DIYEFI.org Forum

Nice. I needed that.

Wow, after seeing your response, I have to actually apologize for wasting your time. I gave NO up front explanation. The source signal is 0 or 12 V digital I want to drive a 12 V signal (actually, it's a switched ground), but at a higher current than the original signal may reliably support. I alrea...

I'd love to, but I already bought that car once.

Actually, I have to say, I really liked it. Want to trade for a 97 sentra?

OMG this is killing me! So, I have a megasquirt II provided switched 12V source. http://abefm.smugmug.com/MegaSquirt-Stuff/NB-MS-Adapterboard/Schematics-and-Issues/darlington12v/719156950_XyHTb-L.png If I don't want to blow the 5V input, I need to clamp the upper voltage. If I put an inline resistor...

http://abefm.smugmug.com/FreeEMS/Build-10 This is the stuff I did for the project, wow, many months ago. Specifically in the second test: http://abefm.smugmug.com/FreeEMS/Build-10/Injector-test-Circuit-2/IMG3887/368888485_5r2Mt-L.jpg It's hard to pick out, but I remember being pretty convinced that ...

I have now ditched the vreg on the TA board and simply jumpered it - turning the unregulated input header into a strictly regulated 5V input (well it was Fred that did this part actually :) ). You have to watch out for Fred. He'll do that. At least I got a bottle of wine out of the deal. It's looki...

That's what I got out of it too - it's length of time to detect various faults. The heat.. Sounds like a lot, but isn't. 1 watt will happily radiate away. And it's not one 100% of the time. If you're that worried, thermal-glue a small heatsink on the chip. It's sold as PWM capable, even without look...

Heh. Hello?

That's pretty amazing. Any idea what they cost?

Certainly the GPIO capability simplifies things. I'd say put two on the board, and 6 or 8 cyl could use both, everyone else could run 8 extra accessories.

See what everyone else says but it's fine by me. Keeping size to a minimum isn't as important in the test board. As I recall, the injector circuits (for instance) were never entirely figured out - this would be a great opportunity to try them... I would say if you lay them out with an eye on getting...