<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">You need a datasheet, or trace the wiring.<div><br></div><div>Seems to be fasttech have the same board slightly cheaper:</div><div><br></div><div><blockquote style="margin: 0 0 0 40px; border: none; padding: 0px;"><div><a href="http://www.fasttech.com/products/0/10000007/1144100-ac-dc-2-channel-relay-module">http://www.fasttech.com/products/0/10000007/1144100-ac-dc-2-channel-relay-module</a></div></blockquote></div><div><br></div><div>and the reviews there say that the relay side must be powered by 12V. There is a jumper on the board.</div><div><br></div><div>If you don't have datasheet, perhaps best is to trace the circuit (it is not complex). Best would be for you to power the opto-isolator side from 5V OVMS, and the relays from 12V direct.</div><div><br></div><div>Regards, Mark.</div><div><br><div><div>On 26 Jun, 2014, at 8:06 am, Olav A. Antonsen <<a href="mailto:olav@ansit.no">olav@ansit.no</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div lang="NO-BOK" link="blue" vlink="purple" style="font-family: Helvetica; font-size: 24px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div class="WordSection1" style="page: WordSection1;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Found the answer to one of my questions...<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">The relays pins are active low.<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"><a href="http://arduino-info.wikispaces.com/ArduinoPower#OI" style="color: purple; text-decoration: underline;">http://arduino-info.wikispaces.com/ArduinoPower#OI</a><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span></div><div><div style="border-style: solid none none; border-top-color: rgb(181, 196, 223); border-top-width: 1pt; padding: 3pt 0cm 0cm;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><b><span style="font-size: 10pt; font-family: Tahoma, sans-serif;">Fra:</span></b><span style="font-size: 10pt; font-family: Tahoma, sans-serif;"><span class="Apple-converted-space"> </span><a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" style="color: purple; text-decoration: underline;">ovmsdev-bounces@lists.teslaclub.hk</a><span class="Apple-converted-space"> </span>[<a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" style="color: purple; text-decoration: underline;">mailto:ovmsdev-bounces@lists.teslaclub.hk</a>]<span class="Apple-converted-space"> </span><b>På vegne av</b><span class="Apple-converted-space"> </span>Olav A. Antonsen<br><b>Sendt:</b><span class="Apple-converted-space"> </span>26. juni 2014 01:55<br><b>Til:</b><span class="Apple-converted-space"> </span>'OVMS Developers'<br><b>Emne:</b><span class="Apple-converted-space"> </span>Re: [Ovmsdev] OVMS - HW<o:p></o:p></span></div></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><o:p> </o:p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">The 7805 gets too hot to touch when running with only one relay closed, so I definitely need to add an external source to the relay module. I'm assuming I can connect the external power source to the 3-pin connector using the JDVcc and Gnd pins?<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Does anyone know if it needs to be +5V? Can I supply the relay board with 12V?<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Another thing I don't understand is the fact that when the OVMS output port i low (0) the relay closes. When I set the output port to 1 the relay opens.<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Looking at the closeup of the relay module, do I need to supply the Vcc pin with +5V on the 4-pin connector?<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Regards,<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Olav<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span></div><div style="border-style: solid none none; border-top-color: rgb(181, 196, 223); border-top-width: 1pt; padding: 3pt 0cm 0cm;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><b><span style="font-size: 10pt; font-family: Tahoma, sans-serif;">Fra:</span></b><span style="font-size: 10pt; font-family: Tahoma, sans-serif;"><span class="Apple-converted-space"> </span><a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" style="color: purple; text-decoration: underline;">ovmsdev-bounces@lists.teslaclub.hk</a><span class="Apple-converted-space"> </span>[<a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" style="color: purple; text-decoration: underline;">mailto:ovmsdev-bounces@lists.teslaclub.hk</a>]<span class="Apple-converted-space"> </span><b>På vegne av</b><span class="Apple-converted-space"> </span>Thomas Bergo<br><b>Sendt:</b><span class="Apple-converted-space"> </span>18. juni 2014 04:16<br><b>Til:</b><span class="Apple-converted-space"> </span>OVMS Developers<br><b>Emne:</b><span class="Apple-converted-space"> </span>Re: [Ovmsdev] OVMS - HW<o:p></o:p></span></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><o:p> </o:p></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;">Hi Olav <o:p></o:p></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><o:p> </o:p></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;">Why don't do it easy and use a MOSFET and a 12V relay. Then you don't need to worry about heat and 5V power consumption.<o:p></o:p></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;">See attached picture sample circuit. You should probably also add a resistor from the output of the PIC to GND to make sure the relay is turn properly off.<o:p></o:p></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><o:p> </o:p></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;">Regards, Thomas <o:p></o:p></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><o:p> </o:p></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><o:p> </o:p></div></div></div><div><p class="MsoNormal" style="margin: 0cm 0cm 12pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><o:p> </o:p></p><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;">2014-06-17 10:04 GMT+02:00 Olav A. Antonsen <<a href="mailto:olav@ansit.no" target="_blank" style="color: purple; text-decoration: underline;">olav@ansit.no</a>>:<o:p></o:p></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Seems like most car phone chargers uses a MC34063 switchmode-regulator chip that is much more efficient than a 7805. Will strip one out of its casing and give it a try.</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">For stronger currents I was told to use a UBEC.</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">--Olav</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><b><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;">From:</span></b><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;"><span class="Apple-converted-space"> </span><a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank" style="color: purple; text-decoration: underline;">ovmsdev-bounces@lists.teslaclub.hk</a><span class="Apple-converted-space"> </span>[mailto:<a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank" style="color: purple; text-decoration: underline;">ovmsdev-bounces@lists.teslaclub.hk</a>]<span class="Apple-converted-space"> </span><b>On Behalf Of<span class="Apple-converted-space"> </span></b>Mastro Gippo<br><b>Sent:</b><span class="Apple-converted-space"> </span>17. juni 2014 09:38</span><span lang="EN-US"><o:p></o:p></span></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US"><br><b>To:</b><span class="Apple-converted-space"> </span>OVMS Developers<br><b>Subject:</b><span class="Apple-converted-space"> </span>Re: [Ovmsdev] OVMS - HW<o:p></o:p></span></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US"> <o:p></o:p></span></div><div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US">Olav, the temperature should not raise that much, as the PCB is dissipating some of the heat. You can just try it and see if it heats up too much (being careful not to blow the fuse, as Mark said), or use your own 7805 slapped to a small heatsink. If you need more power, a car phone charger may be a better choice as it has a more efficient switching supply.<o:p></o:p></span></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US">MG<o:p></o:p></span></div></div><div><p class="MsoNormal" style="margin: 0cm 0cm 12pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US"> <o:p></o:p></span></p><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US">2014-06-17 8:44 GMT+02:00 Olav A. Antonsen <<a href="mailto:olav@ansit.no" target="_blank" style="color: purple; text-decoration: underline;">olav@ansit.no</a>>:<o:p></o:p></span></div><blockquote style="border-style: none none none solid; border-left-color: rgb(204, 204, 204); border-left-width: 1pt; padding: 0cm 0cm 0cm 6pt; margin: 5pt 0cm 5pt 4.8pt;"><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US">100°C/W! 9V * 0.2A = 1.8W => I need to keep the relays closed for 1 hour so it’s going to overheat!<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US"> <o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US">Need to find another solution for feeding the relay module with +5V.<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US"> <o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US">Mastro, any suggestions?<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US"> <o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US">--Olav<o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US"> <o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US"> <o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><b><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;">From:</span></b><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif;"><span class="Apple-converted-space"> </span><a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank" style="color: purple; text-decoration: underline;">ovmsdev-bounces@lists.teslaclub.hk</a><span class="Apple-converted-space"> </span>[mailto:<a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank" style="color: purple; text-decoration: underline;">ovmsdev-bounces@lists.teslaclub.hk</a>]<span class="Apple-converted-space"> </span><b>On Behalf Of<span class="Apple-converted-space"> </span></b>Mastro Gippo<br><b>Sent:</b><span class="Apple-converted-space"> </span>17. juni 2014 00:33<br><b>To:</b><span class="Apple-converted-space"> </span>OVMS Developers<br><b>Subject:</b><span class="Apple-converted-space"> </span>Re: [Ovmsdev] OVMS - HW</span><span lang="EN-US"><o:p></o:p></span></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US"> <o:p></o:p></span></div><div><div><div><div><div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US">Hi, this is the correct DS:<span class="Apple-converted-space"> </span><a href="http://www.st.com/web/en/resource/technical/document/datasheet/CD00000444.pdf" target="_blank" style="color: purple; text-decoration: underline;">http://www.st.com/web/en/resource/technical/document/datasheet/CD00000444.pdf</a><o:p></o:p></span></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US">for the DPAK package the OVMS is using, you have 8°C/W for the TJ and 100°C/W for TA. (it's a small package!)<o:p></o:p></span></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US">Also, you must calc the dissipation thinking about the "dissipated" voltage, so not 5V but (14V-5V) = 9V (worst case).<o:p></o:p></span></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US">You should also add some margin, e.g. use 100mA instead of 80mA just to be safe.<o:p></o:p></span></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US">Just try it and keep a finger on the IC for a few minutes to see if it overheats, it shouldn't hurt the board.<o:p></o:p></span></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US"> <o:p></o:p></span></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US">MG<o:p></o:p></span></div></div><div><p class="MsoNormal" style="margin: 0cm 0cm 12pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US"> <o:p></o:p></span></p><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US">2014-06-17 0:14 GMT+02:00 Olav A. Antonsen <<a href="mailto:olav@ansit.no" target="_blank" style="color: purple; text-decoration: underline;">olav@ansit.no</a>>:<o:p></o:p></span></div><blockquote style="border-style: none none none solid; border-left-color: rgb(204, 204, 204); border-left-width: 1pt; padding: 0cm 0cm 0cm 6pt; margin: 5pt 0cm 5pt 4.8pt;"><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Great video thermal design.</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">My knowledge on thermal design is only 30 minutes old, but my interpretation of the datasheet gives med</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">The regulator will reach 23°C/W above ambient.</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Running at max 1.5A @ 5V = 7.5W.</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">23C/W => 172.5°C -> To hot to handle</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">2 relays @ 80mA each ~ 0.16A @ 5V ~ 0,8W ~ 18.4°C above ambient.</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">My conclusion is that adding a consumption of 160mA will raise the temperature 18.4°C above ambient. (This comes in addition to the current the OVMS module consumes.</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">)</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Is this correct?</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Regards</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Olav</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="border-style: solid none none; border-top-color: rgb(181, 196, 223); border-top-width: 1pt; padding: 3pt 0cm 0cm;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><b><span style="font-size: 10pt; font-family: Tahoma, sans-serif;">Fra:</span></b><span style="font-size: 10pt; font-family: Tahoma, sans-serif;"><span class="Apple-converted-space"> </span><a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank" style="color: purple; text-decoration: underline;">ovmsdev-bounces@lists.teslaclub.hk</a><span class="Apple-converted-space"> </span>[mailto:<a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank" style="color: purple; text-decoration: underline;">ovmsdev-bounces@lists.teslaclub.hk</a>]<span class="Apple-converted-space"> </span><b>På vegne av</b><span class="Apple-converted-space"> </span>Mastro Gippo<br><b>Sendt:</b><span class="Apple-converted-space"> </span>16. juni 2014 23:38</span><span lang="EN-US"><o:p></o:p></span></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><br><b>Til:</b><span class="Apple-converted-space"> </span>OVMS Developers<br><b>Emne:</b><span class="Apple-converted-space"> </span>Re: [Ovmsdev] OVMS - HW<span lang="EN-US"><o:p></o:p></span></div></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"> <span lang="EN-US"><o:p></o:p></span></div><div><div><div><div><div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;">The 1.5A is not the whole story; you can watch this:<span class="Apple-converted-space"> </span><a href="https://www.youtube.com/watch?v=8ruFVmxf0zs" target="_blank" style="color: purple; text-decoration: underline;">https://www.youtube.com/watch?v=8ruFVmxf0zs</a><span lang="EN-US"><o:p></o:p></span></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;">Basically, if you had that 7805 on free air powering your two relays, it would (try to) reach about 170°C above ambient temperature. The PCB is a nice heatsink, but it is shared with the big GSM regulator, and that rises the temperature too.<span lang="EN-US"><o:p></o:p></span></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;">By all means, experiment!! The 7805 has thermal protection, and you should test your circuit on the bench keeping a finger on the IC to feel if it gets too hot.<span lang="EN-US"><o:p></o:p></span></div></div><p class="MsoNormal" style="margin: 0cm 0cm 12pt; font-size: 12pt; font-family: 'Times New Roman', serif;">You should take care of the increased ripple too, but a small cap should do the trick there.<span lang="EN-US"><o:p></o:p></span></p></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;">Regards<span lang="EN-US"><o:p></o:p></span></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;">MG<span lang="EN-US"><o:p></o:p></span></div></div><div><p class="MsoNormal" style="margin: 0cm 0cm 12pt; font-size: 12pt; font-family: 'Times New Roman', serif;"> <span lang="EN-US"><o:p></o:p></span></p><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;">2014-06-16 23:09 GMT+02:00 Olav A. Antonsen <<a href="mailto:olav@ansit.no" target="_blank" style="color: purple; text-decoration: underline;">olav@ansit.no</a>>:<span lang="EN-US"><o:p></o:p></span></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">I got some help from a user on a Norwegian forum who pointed me to</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"><a href="https://raw.githubusercontent.com/openvehicles/Open-Vehicle-Monitoring-System/master/vehicle/Car%20Module/v2-base/OVMS_V6A.pdf" target="_blank" style="color: purple; text-decoration: underline;"><span style="color: rgb(31, 73, 125); text-decoration: none;">https://raw.githubusercontent.com/openvehicles/Open-Vehicle-Monitoring-System/master/vehicle/Car%20Module/v2-base/OVMS_V6A.pdf</span></a></span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Looks like a 7805-regulator is supplying the OVMS module with +5V @ 1.5A max.</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"><a href="https://www.sparkfun.com/datasheets/Components/LM7805.pdf" target="_blank" style="color: purple; text-decoration: underline;">https://www.sparkfun.com/datasheets/Components/LM7805.pdf</a></span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">80mA won't be a problem then.</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">--Olav</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="border-style: solid none none; border-top-color: rgb(181, 196, 223); border-top-width: 1pt; padding: 3pt 0cm 0cm;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><b><span style="font-size: 10pt; font-family: Tahoma, sans-serif;">Fra:</span></b><span style="font-size: 10pt; font-family: Tahoma, sans-serif;"><span class="Apple-converted-space"> </span><a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank" style="color: purple; text-decoration: underline;">ovmsdev-bounces@lists.teslaclub.hk</a><span class="Apple-converted-space"> </span>[mailto:<a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank" style="color: purple; text-decoration: underline;">ovmsdev-bounces@lists.teslaclub.hk</a>]<span class="Apple-converted-space"> </span><b>På vegne av</b><span class="Apple-converted-space"> </span>Mastro Gippo<br><b>Sendt:</b><span class="Apple-converted-space"> </span>16. juni 2014 23:03<br><b>Til:</b><span class="Apple-converted-space"> </span>OVMS Developers<br><b>Emne:</b><span class="Apple-converted-space"> </span>Re: [Ovmsdev] OVMS - HW</span><span lang="EN-US"><o:p></o:p></span></div></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"> <span lang="EN-US"><o:p></o:p></span></div><div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;">It may be a problem to get the 5V from the output of the regulator, but the nice thing about that module is that it is isolated; you can connect your own power supply and be 100% safe. These relays draw about 80mA each (just tested them, I have the same product at home), so if you turn them on one at a time and for short periods of time it should be ok (I don't know a lot about the termal design of the OVMS).<span lang="EN-US"><o:p></o:p></span></div></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;">MG<span lang="EN-US"><o:p></o:p></span></div></div><div><p class="MsoNormal" style="margin: 0cm 0cm 12pt; font-size: 12pt; font-family: 'Times New Roman', serif;"> <span lang="EN-US"><o:p></o:p></span></p><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;">2014-06-16 22:37 GMT+02:00 Olav A. Antonsen <<a href="mailto:olav@ansit.no" target="_blank" style="color: purple; text-decoration: underline;">olav@ansit.no</a>>:<span lang="EN-US"><o:p></o:p></span></div><div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Hello</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">My knowledge of electronics is limited.</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">As far as I understand the OVMS module is supplied with +12V via the OBD connector. What I don't understand is where the +5V comes from?</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"><a href="https://github.com/openvehicles/Open-Vehicle-Monitoring-System/blob/master/vehicle/Car%20Module/v2-base/20120814-boarddesign.pdf" target="_blank" style="color: purple; text-decoration: underline;">https://github.com/openvehicles/Open-Vehicle-Monitoring-System/blob/master/vehicle/Car%20Module/v2-base/20120814-boarddesign.pdf</a></span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">I'm currently trying to control a relay using the RC3 output on the PIC18F2580 as a control signal to a rely on a relay module</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"><a href="http://www.dx.com/p/arduino-2-channel-relay-shield-module-red-144140#.U59Qavl_t8E" target="_blank" style="color: purple; text-decoration: underline;">http://www.dx.com/p/arduino-2-channel-relay-shield-module-red-144140#.U59Qavl_t8E</a>.</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">The relay module needs to be supplied with +5V to drive the relays, and my plan was to get the +5V from the OVMS module using pin 13 on the HEADER 9X2.</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">But I'm afraid I might blow something on the OVMS module if the relay module draws to many mA.</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">Any advice would be appreciated.</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);">--Olav</span><span lang="EN-US"><o:p></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><span lang="EN-US" style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);"> </span><span lang="EN-US"><o:p></o:p></span></div></div><p class="MsoNormal" style="margin: 0cm 0cm 12pt; font-size: 12pt; font-family: 'Times New Roman', serif;"><br>_______________________________________________<br>OvmsDev mailing list<br><a href="mailto:OvmsDev@lists.teslaclub.hk" target="_blank" style="color: purple; text-decoration: underline;">OvmsDev@lists.teslaclub.hk</a><br><a href="http://lists.teslaclub.hk/mailman/listinfo/ovmsdev" target="_blank" style="color: purple; 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