FridgeFreezer Posted February 25, 2013 Share Posted February 25, 2013 Well spotted on R40 - it can be bridged out if Q19's not fitted, but doesn't make a lot of difference as it's only 1 Ohm. ref. Q19, it becomes obvious if you look at the circuit diagram (which I just had to to double-check!): R40 (or the jumper in its place) throws a short across pin 1 & 2 of Q19. So, no need to worry there! Quote Link to comment Share on other sites More sharing options...
dirtyninety Posted February 25, 2013 Author Share Posted February 25, 2013 Thank God for that! Cheers fridge!! Quote Link to comment Share on other sites More sharing options...
dirtyninety Posted February 26, 2013 Author Share Posted February 26, 2013 Right, I have everything soldered except the TIP122 Looking forward to getting that and see it running! Best start looking at MSA spec cages and start a build thread! Quote Link to comment Share on other sites More sharing options...
dirtyninety Posted February 26, 2013 Author Share Posted February 26, 2013 RIGHT! I now have everything fully soldered and even installed into the case. Brilliant. Plug in Stim... no lights on Megasquirt Thats the DB9 cable awaiting to be plugged into the PC Is there something im missing?! Quote Link to comment Share on other sites More sharing options...
cosecon Posted February 27, 2013 Share Posted February 27, 2013 Sorry if I say something stupid, but it looks you have not plugged the stim to the ms board???? Do you connect via cable, or directly the stim to the ms? Quote Link to comment Share on other sites More sharing options...
dirtyninety Posted February 27, 2013 Author Share Posted February 27, 2013 Connected via a DB37 cable. The DB9 cable you can see is for computer to Megasquirt Quote Link to comment Share on other sites More sharing options...
cosecon Posted February 27, 2013 Share Posted February 27, 2013 Did you check to see the 12v (9v with battery) and 5v on the ms board? I did not use a cable, I just removed the small securing nuts on the stim db37 and plugged directly to the ms. If you have the correct voltages, check the RPM switch on the stim, maybe you have no rpm signal. No rpm signal, no injection. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted February 27, 2013 Share Posted February 27, 2013 Have you got the mods installed: TSEL->OPTO_OUT and TACHSELECT->OPTO_IN Without those, no RPM = no action. Also, is your stim set up for EDIS mode? (some need to be) Quote Link to comment Share on other sites More sharing options...
dirtyninety Posted February 27, 2013 Author Share Posted February 27, 2013 BOOM, made a very silly mistake!! Quote Link to comment Share on other sites More sharing options...
cosecon Posted February 27, 2013 Share Posted February 27, 2013 What was it??? Quote Link to comment Share on other sites More sharing options...
dirtyninety Posted February 27, 2013 Author Share Posted February 27, 2013 Not sure i want to say...... plugged the megasquirt chip in the wrong way round doh! Got it plugged into my PC now running tunerstudio, all looks to be working Quote Link to comment Share on other sites More sharing options...
cosecon Posted February 27, 2013 Share Posted February 27, 2013 Lucky you did not fry it!!! I guess the 9v battery saved the day.... I am not sure a 12v power supply would be so forgiving. Quote Link to comment Share on other sites More sharing options...
dirtyninety Posted February 27, 2013 Author Share Posted February 27, 2013 Yeah very lucky! I've actually got the 12v power supply but decided to use the a battery! Quote Link to comment Share on other sites More sharing options...
cosecon Posted February 27, 2013 Share Posted February 27, 2013 I used a 12volt power supply, but with current limit, so I set it very low to be sure. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted February 27, 2013 Share Posted February 27, 2013 I expect even at 12V the ECU owuld have been fine, they are very well protected, PCB and chip nowadays, after all it is only a diode required Quote Link to comment Share on other sites More sharing options...
AncientGeek Posted February 28, 2013 Share Posted February 28, 2013 I connected 12v power to the stim the wrong way round... the there was a sharp crack and flash from the ms board followed by the sound of a facepalm. It still worked afterwards.. it continues to work. Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted February 28, 2013 Share Posted February 28, 2013 followed by the sound of a facepalm Quote Link to comment Share on other sites More sharing options...
Laptom Posted March 22, 2013 Share Posted March 22, 2013 The finishing stages... I also build mine, but have not finish it properly. The car is run like a mad man though... Cleaning the board with 90% alcohol I think? How to protect the PCB from humidity/moisture? What can the best used for first protection (will also put the complete system in a water tight box)? I heard stuff like Flux SK10... Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted March 22, 2013 Share Posted March 22, 2013 Cleaning with Isopropyl Alcohol (IPA) is fine, there are dedicated PCB cleaners but I've tried about 5 or 6 and none do much better than IPA & a stiff brush. For coating, use acrylic conformal coating, most electronics suppliers will have some, even maplins. Just be careful of getting it on connector pins or in the MAP sensor. Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted March 22, 2013 Share Posted March 22, 2013 I found the same. Coupled with a cheap Tesco's toothbrush it only takes a minute to clean a board. Quote Link to comment Share on other sites More sharing options...
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