<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr"></div><div dir="ltr"><br></div><div dir="ltr">To be 100% clear, you are powering this from the car’s 12V, right? Not usb? The ext12v simply switches the car’s 12v power line, and doesn’t generate anything itself.</div><div dir="ltr"><br></div><div dir="ltr">If that is so, I think the best check is to see that ext12v line and make sure it is being switched correctly.</div><div dir="ltr"><br></div><div dir="ltr">Regards, Mark</div><div dir="ltr"><br><div dir="ltr"></div><blockquote type="cite">On 17 Oct 2022, at 8:32 AM, Michael Geddes <frog@bunyip.wheelycreek.net> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="auto"><div>To be honest, I probably wouldn't trust myself. Might try and get a DA26 through cable or breakout cable so I can make sure I don't break things. </div><div dir="auto"><br></div><div dir="auto">Michael<br><br><div class="gmail_quote" dir="auto"><div dir="ltr" class="gmail_attr">On Sun, 16 Oct 2022, 4:16 pm Michael Balzer, <<a href="mailto:dexter@expeedo.de">dexter@expeedo.de</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
If you're careful, you can measure directly at the voltage switch
BTS452R, which is located in the upper left corner of the board
close to the DA26 connector (label U4).<br>
<br>
See
<a href="https://www.infineon.com/dgdl/Infineon-BTS452R-DS-v01_01-en.pdf?fileId=db3a30431ddc9372011ddd17aba80002" target="_blank" rel="noreferrer">https://www.infineon.com/dgdl/Infineon-BTS452R-DS-v01_01-en.pdf?fileId=db3a30431ddc9372011ddd17aba80002</a><br>
<br>
12V output is the rightmost pin when viewing from the top, pins
down, GND is the leftmost pin. Power input is on the tab.<br>
<br>
Regards,<br>
Michael<br>
<br>
<br>
<div>Am 16.10.22 um 09:58 schrieb Michael
Geddes:<br>
</div>
<blockquote type="cite">
<div dir="auto">
<div>If you mean the 12v output to the HUD, then no. I hadn't
got a way of doing that yet. </div>
<div dir="auto">It had crossed my mind... But was working on the
things I could do. </div>
<div dir="auto"><br>
</div>
<div dir="auto">I haven't got those nice clamp ends on my
multimeter. Just probes. </div>
<div dir="auto"><br>
</div>
<div dir="auto">Michael <br>
<br>
<div class="gmail_quote" dir="auto">
<div dir="ltr" class="gmail_attr">On Sun, 16 Oct 2022, 3:52
pm Michael Balzer, <<a href="mailto:dexter@expeedo.de" target="_blank" rel="noreferrer">dexter@expeedo.de</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div> Michael,<br>
<br>
did you check the SW_12V level with the HUD connected?<br>
<br>
Regards,<br>
Michael<br>
<br>
<br>
<div>Am 16.10.22 um 06:36 schrieb Michael Geddes:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div dir="ltr">Thanks for the response Greg.
<div><br>
</div>
<div>I tried what you suggested and it still
doesn't turn on. (The 'on/off' is a slider
switch rather than a momentary button)</div>
<div><br>
</div>
<div>I also went into Jaycar and tried this simple
HUD: <a href="https://www.jaycar.com.au/gps-speedometer-head-up-display-with-obdii-data/p/LA9036?gclid=CjwKCAjwtKmaBhBMEiwAyINuwAF-ZMXvydGdYsUu--w37CmHr6mf1Emx_o2shbA3IvUNUQ4k-ZWtcBoCwQoQAvD_BwE" rel="noreferrer noreferrer" target="_blank">https://www.jaycar.com.au/gps-speedometer-head-up-display-with-obdii-data/p/LA9036?gclid=CjwKCAjwtKmaBhBMEiwAyINuwAF-ZMXvydGdYsUu--w37CmHr6mf1Emx_o2shbA3IvUNUQ4k-ZWtcBoCwQoQAvD_BwE</a></div>
<div>Results were the same (didn't have time to
find any settings though - as I got permission
to try it before I bought it).</div>
<div><br>
</div>
<div>I also confirmed that the cable is wired
exactly as specified (no more, no less)
including 120ohm resistor.</div>
<div><br>
</div>
<div>I'm starting to think there's an issue with
the OVMS board itself!?</div>
<div><br>
</div>
<div>//.ichael</div>
<div><br>
</div>
</div>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sun, 16 Oct
2022 at 02:09, Greg D. <<a href="mailto:gregd2350@gmail.com" rel="noreferrer noreferrer" target="_blank">gregd2350@gmail.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF"> Hi Michael,<br>
<br>
Yeah, odd. <br>
<br>
I see in the description that there's a power
switch on the side of the unit, so that will
probably interact with the voltage
transition. After turning Ext12v on, and
pushing the on/off button on the HUD unit, I
would expect it would turn on. After that,
transitioning Ext12v on/off should trigger the
unit to turn on/off as well.<br>
<br>
Assuming you do get it running, what I would
suggest is to create a pair of Events to force
Ext12v on and off when the car state
transitions. For my car, the states are
vehicle.on and vehicle.off, but yours might be
different. In the "on" event script I also
stop and restart the obd2ecu process, as that
will clear the CAN3 bus hang that I've
experienced. It's a long shot, but perhaps
the HUD isn't turning on because it's not
seeing CAN traffic. You might try the 12v off
/ ecu stop / ecu start / 12v on sequence
manually and see if that wakes the HUD up.<br>
<blockquote>OVMS# vfs cat
/store/events/vehicle.on/myevent<br>
power ext12v off<br>
obdii ecu stop<br>
obdii ecu start can3<br>
power ext12v on<br>
<br>
OVMS# vfs cat
/store/events/vehicle.off/myevent<br>
power ext12v off<br>
</blockquote>
Good luck!<br>
<br>
Greg<br>
<br>
<br>
<div>Michael Geddes wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">More information:
<div><br>
<div>I'm definitely getting power on the
OVMS -> OBDII cable. 11 volts when
the car is off, and 12.6 volts when
the car is on. I'm assuming this is
quite deliberate. (And like 0.2 volts
when the power to the ext12v is off).</div>
<div><br>
</div>
<div>By default, the HUD was needing
(according to docs - probably) 13.2v
to trigger it to turn on.. so I
connected it directly to the car OBD
and changed that setting to 11.5
volts.</div>
<div><br>
</div>
<div>When I turned the car off (still
connected directly).. the HUD remained
on as it was still getting > 12V..
so the setting definitely worked.</div>
<div><br>
</div>
<div>Unfortunately when I then connected
the OVMS to the OBDII and the OVMS
-> OBDII cable to the HUD - it
still didn't turn on. :( (oh and yes
- "power ext12v on". </div>
<div><br>
</div>
<div>Any thoughts on this would be
welcome.</div>
<div><br>
</div>
<div>//.ichael</div>
<div><br>
</div>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sat,
15 Oct 2022 at 07:15, Michael Geddes
<<a href="mailto:frog@bunyip.wheelycreek.net" rel="noreferrer noreferrer" target="_blank">frog@bunyip.wheelycreek.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="ltr">Hi all,<br>
<div>Anybody got any experience with
HUDs?</div>
<div><br>
</div>
<div>I bought this simple HUD from
FastTech:</div>
<div><a href="https://www.fasttech.com/products/9686283" rel="noreferrer noreferrer" target="_blank">https://www.fasttech.com/products/9686283</a></div>
<div>When connected direct to the
OBDII port, it powers on and seems
to function. When I connect it to
the OVMS module with the standard <a href="https://www.fasttech.com/products/9652027" rel="noreferrer noreferrer" target="_blank">https://www.fasttech.com/products/9652027</a>
the HUD doesn't even power on.</div>
<div><br>
</div>
<div>It's stated draw is 200ma which
afaict should be fine. I'm pretty
sure the 12V power is getting to PIN
16... though I will try again to
make sure. I only have a crappy
little Multimeter.</div>
<div><br>
</div>
<div>On the Troubleshooting it states:</div>
<div> "HUD only available for cars
with OBD2 and EU-OBD agreements ...
HUD Products don't support JOBD and
OBDI protocol."</div>
<div><br>
</div>
<div>The OBD HUD connector has the
following pins:</div>
<div>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">4*
Chassis</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">5*
Signal Ground</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">6
CAN High</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">7
<b>ISO9141 K Line</b></p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">14
CAN Low</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">15
<b>ISO9141 L Line</b></p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">16
Vehicle Battery +ve</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">*
Long pins</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent"><br>
</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">These
are the standard OVMS supplied
pins:</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">4
Chassis Ground</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">5
Chassis Ground</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">6
CAN H (Primary)</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">14
CAN L (Primary)</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">16
+12V</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">So
obviously the main difference is
the lack of K / L lines in the
OVMS ... but I wouldn't have
thought that would have prevented
it from powering up.</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">Does
anybody have any thoughts on this?</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent">//.ichael</p>
<p style="line-height:100%;margin-bottom:0cm;background:transparent"><br>
</p>
</div>
</div>
</blockquote>
</div>
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