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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I found the data sheet for the relays, and it seems like they come in 3,5,6,9,12,24,48 V versions. (http://www.hobbytronics.co.uk/datasheets/songle-12v-relay.pdf).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The relay on my module is marked as SRD-05VDC-SL-C meaning the coil should be driven by +5V.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Question1<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>If I get a relay module with 12V coils can I use the +12V pin on the 9X2 header (OVMS) module as a source for 12V? Any fuses I can risk blowing?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Question2<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Instead of soldering wires directly to the 9x2 header on the OVMS, is the any other way to connect wires? I’m thinking about something similar to the connector (pins) used to connect the PIC programmer to the OVMS?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Regards<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Olav <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> ovmsdev-bounces@lists.teslaclub.hk [mailto:ovmsdev-bounces@lists.teslaclub.hk] <b>On Behalf Of </b>Mastro Gippo<br><b>Sent:</b> 26. juni 2014 09:21<br><b>To:</b> OVMS Developers<br><b>Subject:</b> Re: [Ovmsdev] OVMS - HW<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p>Be careful and read the relay code, dx ones seem to be 5v as mine, while fasttech one is 12v. I don't have the relay now, but you should have no problem supplying it from the secondary connector, just don't feed it back to the ovms. The board already provides optocouplers and mosfets to drive the relay, so you should just need to pull signals to ground.<br>Regards<br>MG<o:p></o:p></p><div><p class=MsoNormal>On 26 Jun 2014 02:43, "Mark Webb-Johnson" <<a href="mailto:mark@webb-johnson.net">mark@webb-johnson.net</a>> wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><div><p class=MsoNormal>This may help:<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><a href="http://www.hobbytronics.co.uk/8-channel-relay-board" target="_blank">http://www.hobbytronics.co.uk/8-channel-relay-board</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Seems similar and suggests you put 12V on VCC and that the green jumper is to isolate signal ground from power ground. In OVMS case, the two grounds are the same so it shouldn't matter.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Regards, Mark.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On 26 Jun, 2014, at 8:36 am, Mark Webb-Johnson <<a href="mailto:mark@webb-johnson.net" target="_blank">mark@webb-johnson.net</a>> wrote:<o:p></o:p></p></div><p class=MsoNormal><br><br><o:p></o:p></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal>You need a datasheet, or trace the wiring.<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Seems to be fasttech have the same board slightly cheaper:<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><blockquote style='margin-left:30.0pt;margin-right:0cm'><p class=MsoNormal><a href="http://www.fasttech.com/products/0/10000007/1144100-ac-dc-2-channel-relay-module" target="_blank">http://www.fasttech.com/products/0/10000007/1144100-ac-dc-2-channel-relay-module</a><o:p></o:p></p></blockquote></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>and the reviews there say that the relay side must be powered by 12V. There is a jumper on the board.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>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.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Regards, Mark.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On 26 Jun, 2014, at 8:06 am, Olav A. Antonsen <<a href="mailto:olav@ansit.no" target="_blank">olav@ansit.no</a>> wrote:<o:p></o:p></p></div><p class=MsoNormal><br><br><o:p></o:p></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Found the answer to one of my questions...</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The relays pins are active low.</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="http://arduino-info.wikispaces.com/ArduinoPower#OI" target="_blank"><span style='color:purple'>http://arduino-info.wikispaces.com/ArduinoPower#OI</span></a></span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><div><p class=MsoNormal><b><span lang=NO-BOK style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Fra:</span></b><span lang=NO-BOK style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank"><span style='color:purple'>ovmsdev-bounces@lists.teslaclub.hk</span></a> [<a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank"><span style='color:purple'>mailto:ovmsdev-bounces@lists.teslaclub.hk</span></a>] <b>På vegne av</b> Olav A. Antonsen<br><b>Sendt:</b> 26. juni 2014 01:55<br><b>Til:</b> 'OVMS Developers'<br><b>Emne:</b> Re: [Ovmsdev] OVMS - HW</span><span lang=NO-BOK><o:p></o:p></span></p></div></div></div><div><p class=MsoNormal><span lang=NO-BOK> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>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?</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Does anyone know if it needs to be +5V? Can I supply the relay board with 12V?</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>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.</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Looking at the closeup of the relay module, do I need to supply the Vcc pin with +5V on the 4-pin connector?</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Regards,</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Olav</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><div><p class=MsoNormal><b><span lang=NO-BOK style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Fra:</span></b><span lang=NO-BOK style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank"><span style='color:purple'>ovmsdev-bounces@lists.teslaclub.hk</span></a> [<a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank"><span style='color:purple'>mailto:ovmsdev-bounces@lists.teslaclub.hk</span></a>] <b>På vegne av</b> Thomas Bergo<br><b>Sendt:</b> 18. juni 2014 04:16<br><b>Til:</b> OVMS Developers<br><b>Emne:</b> Re: [Ovmsdev] OVMS - HW</span><span lang=NO-BOK><o:p></o:p></span></p></div></div><div><p class=MsoNormal><span lang=NO-BOK> <o:p></o:p></span></p></div><div><div><p class=MsoNormal><span lang=NO-BOK>Hi Olav <o:p></o:p></span></p></div><div><div><p class=MsoNormal><span lang=NO-BOK> <o:p></o:p></span></p></div></div><div><div><p class=MsoNormal><span lang=NO-BOK>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></span></p></div></div><div><div><p class=MsoNormal><span lang=NO-BOK>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></span></p></div></div><div><div><p class=MsoNormal><span lang=NO-BOK> <o:p></o:p></span></p></div></div><div><div><p class=MsoNormal><span lang=NO-BOK>Regards, Thomas <o:p></o:p></span></p></div></div><div><div><p class=MsoNormal><span lang=NO-BOK> <o:p></o:p></span></p></div></div><div><div><p class=MsoNormal><span lang=NO-BOK> <o:p></o:p></span></p></div></div></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=NO-BOK> <o:p></o:p></span></p><div><div><p class=MsoNormal><span lang=NO-BOK>2014-06-17 10:04 GMT+02:00 Olav A. Antonsen <<a href="mailto:olav@ansit.no" target="_blank"><span style='color:purple'>olav@ansit.no</span></a>>:<o:p></o:p></span></p></div><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>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=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>For stronger currents I was told to use a UBEC.</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>--Olav</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank"><span style='color:purple'>ovmsdev-bounces@lists.teslaclub.hk</span></a> [mailto:<a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank"><span style='color:purple'>ovmsdev-bounces@lists.teslaclub.hk</span></a>] <b>On Behalf Of </b>Mastro Gippo<br><b>Sent:</b> 17. juni 2014 09:38</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><div><p class=MsoNormal><br><b>To:</b> OVMS Developers<br><b>Subject:</b> Re: [Ovmsdev] OVMS - HW<span lang=NO-BOK><o:p></o:p></span></p></div></div><div><div><p class=MsoNormal> <span lang=NO-BOK><o:p></o:p></span></p></div><div><div><div><p class=MsoNormal>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.<span lang=NO-BOK><o:p></o:p></span></p></div></div><div><p class=MsoNormal>MG<span lang=NO-BOK><o:p></o:p></span></p></div></div><div><p class=MsoNormal style='margin-bottom:12.0pt'> <span lang=NO-BOK><o:p></o:p></span></p><div><div><p class=MsoNormal>2014-06-17 8:44 GMT+02:00 Olav A. Antonsen <<a href="mailto:olav@ansit.no" target="_blank"><span style='color:purple'>olav@ansit.no</span></a>>:<span lang=NO-BOK><o:p></o:p></span></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt'><div><div><p class=MsoNormal>100°C/W! 9V * 0.2A = 1.8W => I need to keep the relays closed for 1 hour so it’s going to overheat!<span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal> <span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal>Need to find another solution for feeding the relay module with +5V.<span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal> <span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal>Mastro, any suggestions?<span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal> <span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal>--Olav<span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal> <span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal> <span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank"><span style='color:purple'>ovmsdev-bounces@lists.teslaclub.hk</span></a> [mailto:<a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank"><span style='color:purple'>ovmsdev-bounces@lists.teslaclub.hk</span></a>] <b>On Behalf Of </b>Mastro Gippo<br><b>Sent:</b> 17. juni 2014 00:33<br><b>To:</b> OVMS Developers<br><b>Subject:</b> Re: [Ovmsdev] OVMS - HW</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><div><p class=MsoNormal> <span lang=NO-BOK><o:p></o:p></span></p></div><div><div><div><div><div><div><div><p class=MsoNormal>Hi, this is the correct DS: <a href="http://www.st.com/web/en/resource/technical/document/datasheet/CD00000444.pdf" target="_blank"><span style='color:purple'>http://www.st.com/web/en/resource/technical/document/datasheet/CD00000444.pdf</span></a><span lang=NO-BOK><o:p></o:p></span></p></div></div><div><p class=MsoNormal>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!)<span lang=NO-BOK><o:p></o:p></span></p></div></div><div><p class=MsoNormal>Also, you must calc the dissipation thinking about the "dissipated" voltage, so not 5V but (14V-5V) = 9V (worst case).<span lang=NO-BOK><o:p></o:p></span></p></div></div><div><p class=MsoNormal>You should also add some margin, e.g. use 100mA instead of 80mA just to be safe.<span lang=NO-BOK><o:p></o:p></span></p></div></div><div><p class=MsoNormal>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.<span lang=NO-BOK><o:p></o:p></span></p></div></div><div><div><p class=MsoNormal> <span lang=NO-BOK><o:p></o:p></span></p></div></div><div><p class=MsoNormal>MG<span lang=NO-BOK><o:p></o:p></span></p></div></div><div><p class=MsoNormal style='margin-bottom:12.0pt'> <span lang=NO-BOK><o:p></o:p></span></p><div><div><p class=MsoNormal>2014-06-17 0:14 GMT+02:00 Olav A. Antonsen <<a href="mailto:olav@ansit.no" target="_blank"><span style='color:purple'>olav@ansit.no</span></a>>:<span lang=NO-BOK><o:p></o:p></span></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt'><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Great video thermal design.</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>My knowledge on thermal design is only 30 minutes old, but my interpretation of the datasheet gives med</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The regulator will reach 23°C/W above ambient.</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Running at max 1.5A @ 5V = 7.5W.</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>23C/W => 172.5°C -> To hot to handle</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>2 relays @ 80mA each ~ 0.16A @ 5V ~ 0,8W ~ 18.4°C above ambient.</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>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=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>)</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Is this correct?</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Regards</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Olav</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><div><p class=MsoNormal><b><span lang=NO-BOK style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Fra:</span></b><span lang=NO-BOK style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank"><span style='color:purple'>ovmsdev-bounces@lists.teslaclub.hk</span></a> [mailto:<a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank"><span style='color:purple'>ovmsdev-bounces@lists.teslaclub.hk</span></a>] <b>På vegne av</b> Mastro Gippo<br><b>Sendt:</b> 16. juni 2014 23:38</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><div><p class=MsoNormal><span lang=NO-BOK><br><b>Til:</b> OVMS Developers<br><b>Emne:</b> Re: [Ovmsdev] OVMS - HW<o:p></o:p></span></p></div></div></div><div><div><p class=MsoNormal><span lang=NO-BOK> <o:p></o:p></span></p></div><div><div><div><div><div><div><div><p class=MsoNormal><span lang=NO-BOK>The 1.5A is not the whole story; you can watch this: <a href="https://www.youtube.com/watch?v=8ruFVmxf0zs" target="_blank"><span style='color:purple'>https://www.youtube.com/watch?v=8ruFVmxf0zs</span></a><o:p></o:p></span></p></div></div><div><p class=MsoNormal><span lang=NO-BOK>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.<o:p></o:p></span></p></div></div><div><p class=MsoNormal><span lang=NO-BOK>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.<o:p></o:p></span></p></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=NO-BOK>You should take care of the increased ripple too, but a small cap should do the trick there.<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=NO-BOK>Regards<o:p></o:p></span></p></div></div><div><p class=MsoNormal><span lang=NO-BOK>MG<o:p></o:p></span></p></div></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=NO-BOK> <o:p></o:p></span></p><div><div><p class=MsoNormal><span lang=NO-BOK>2014-06-16 23:09 GMT+02:00 Olav A. Antonsen <<a href="mailto:olav@ansit.no" target="_blank"><span style='color:purple'>olav@ansit.no</span></a>>:<o:p></o:p></span></p></div><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I got some help from a user on a Norwegian forum who pointed me to</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="https://raw.githubusercontent.com/openvehicles/Open-Vehicle-Monitoring-System/master/vehicle/Car%20Module/v2-base/OVMS_V6A.pdf" target="_blank"><span style='color:#1F497D;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=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Looks like a 7805-regulator is supplying the OVMS module with +5V @ 1.5A max.</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="https://www.sparkfun.com/datasheets/Components/LM7805.pdf" target="_blank"><span style='color:purple'>https://www.sparkfun.com/datasheets/Components/LM7805.pdf</span></a></span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>80mA won't be a problem then.</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>--Olav</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><div><p class=MsoNormal><b><span lang=NO-BOK style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Fra:</span></b><span lang=NO-BOK style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank"><span style='color:purple'>ovmsdev-bounces@lists.teslaclub.hk</span></a> [mailto:<a href="mailto:ovmsdev-bounces@lists.teslaclub.hk" target="_blank"><span style='color:purple'>ovmsdev-bounces@lists.teslaclub.hk</span></a>] <b>På vegne av</b> Mastro Gippo<br><b>Sendt:</b> 16. juni 2014 23:03<br><b>Til:</b> OVMS Developers<br><b>Emne:</b> Re: [Ovmsdev] OVMS - HW</span><span lang=NO-BOK><o:p></o:p></span></p></div></div><div><div><p class=MsoNormal><span lang=NO-BOK> <o:p></o:p></span></p></div><div><div><div><p class=MsoNormal><span lang=NO-BOK>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).<o:p></o:p></span></p></div></div><div><p class=MsoNormal><span lang=NO-BOK>MG<o:p></o:p></span></p></div></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=NO-BOK> <o:p></o:p></span></p><div><div><p class=MsoNormal><span lang=NO-BOK>2014-06-16 22:37 GMT+02:00 Olav A. Antonsen <<a href="mailto:olav@ansit.no" target="_blank"><span style='color:purple'>olav@ansit.no</span></a>>:<o:p></o:p></span></p></div><div><div><p class=MsoNormal><span lang=NO-BOK style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hello</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=NO-BOK style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>My knowledge of electronics is limited.</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>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=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="https://github.com/openvehicles/Open-Vehicle-Monitoring-System/blob/master/vehicle/Car%20Module/v2-base/20120814-boarddesign.pdf" target="_blank"><span style='color:purple'>https://github.com/openvehicles/Open-Vehicle-Monitoring-System/blob/master/vehicle/Car%20Module/v2-base/20120814-boarddesign.pdf</span></a></span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>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=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="http://www.dx.com/p/arduino-2-channel-relay-shield-module-red-144140#.U59Qavl_t8E" target="_blank"><span style='color:purple'>http://www.dx.com/p/arduino-2-channel-relay-shield-module-red-144140#.U59Qavl_t8E</span></a>.</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>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=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>But I'm afraid I might blow something on the OVMS module if the relay module draws to many mA.</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Any advice would be appreciated.</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>--Olav</span><span lang=NO-BOK><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><span lang=NO-BOK><o:p></o:p></span></p></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=NO-BOK><br>_______________________________________________<br>OvmsDev mailing list<br><a href="mailto:OvmsDev@lists.teslaclub.hk" target="_blank"><span style='color:purple'>OvmsDev@lists.teslaclub.hk</span></a><br><a href="http://lists.teslaclub.hk/mailman/listinfo/ovmsdev" target="_blank"><span style='color:purple'>http://lists.teslaclub.hk/mailman/listinfo/ovmsdev</span></a><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=NO-BOK> <o:p></o:p></span></p></div></div></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=NO-BOK><br>_______________________________________________<br>OvmsDev mailing list<br><a href="mailto:OvmsDev@lists.teslaclub.hk" target="_blank"><span style='color:purple'>OvmsDev@lists.teslaclub.hk</span></a><br><a href="http://lists.teslaclub.hk/mailman/listinfo/ovmsdev" target="_blank"><span style='color:purple'>http://lists.teslaclub.hk/mailman/listinfo/ovmsdev</span></a><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=NO-BOK> <o:p></o:p></span></p></div></div></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><br>_______________________________________________<br>OvmsDev mailing list<br><a href="mailto:OvmsDev@lists.teslaclub.hk" target="_blank"><span style='color:purple'>OvmsDev@lists.teslaclub.hk</span></a><br><a href="http://lists.teslaclub.hk/mailman/listinfo/ovmsdev" target="_blank"><span style='color:purple'>http://lists.teslaclub.hk/mailman/listinfo/ovmsdev</span></a><span lang=NO-BOK><o:p></o:p></span></p></blockquote></div><div><p class=MsoNormal> <span lang=NO-BOK><o:p></o:p></span></p></div></div></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><br>_______________________________________________<br>OvmsDev mailing list<br><a href="mailto:OvmsDev@lists.teslaclub.hk" target="_blank"><span style='color:purple'>OvmsDev@lists.teslaclub.hk</span></a><br><a href="http://lists.teslaclub.hk/mailman/listinfo/ovmsdev" target="_blank"><span style='color:purple'>http://lists.teslaclub.hk/mailman/listinfo/ovmsdev</span></a><span lang=NO-BOK><o:p></o:p></span></p></blockquote></div><div><p class=MsoNormal> <span lang=NO-BOK><o:p></o:p></span></p></div></div></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=NO-BOK><br>_______________________________________________<br>OvmsDev mailing list<br><a href="mailto:OvmsDev@lists.teslaclub.hk" target="_blank"><span style='color:purple'>OvmsDev@lists.teslaclub.hk</span></a><br><a href="http://lists.teslaclub.hk/mailman/listinfo/ovmsdev" target="_blank"><span style='color:purple'>http://lists.teslaclub.hk/mailman/listinfo/ovmsdev</span></a><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=NO-BOK> <o:p></o:p></span></p></div></div></div><p class=MsoNormal><span lang=NO-BOK style='font-size:18.0pt;font-family:"Helvetica","sans-serif"'>_______________________________________________<br>OvmsDev mailing list<br><a href="mailto:OvmsDev@lists.teslaclub.hk" target="_blank"><span style='color:purple'>OvmsDev@lists.teslaclub.hk</span></a><br><a href="http://lists.teslaclub.hk/mailman/listinfo/ovmsdev" target="_blank"><span style='color:purple'>http://lists.teslaclub.hk/mailman/listinfo/ovmsdev</span></a><o:p></o:p></span></p></div></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div></div><p class=MsoNormal>_______________________________________________<br>OvmsDev 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