MicroSquirt.com read only forum (Jan.15,2018)

just for completeness for anyone reading this later. They are 4 wire COPs and trigger just fine with the 5v logic level output of the microsquirt v3.
Dwell seems happy at 2.5ms. runs fine without any significant heating of the coils.

Thanks, now running perfectly on COPs. Going high is correct for these packs.
Now running up to 20psi without any sign of flame outs. Pretty scarey in a Miata!

Just a quick check with the community before I make an expensive mistake. I'm going to drive 2 pairs of Toyota COPs and not sure if I should use spark output going high or going low. Seen a few contradictory answers with a google search. Anyone able to give me a definitive answer?

The COPs are from ...

Did some more thinking about my timing weirdness.

MX5 crank sensor, 12-1 wheel, The OE MX5 sensor is not true VR it has a straight square wave output. Normally sits at 5V and drops to 0v when a tooth passes.

How should I configure this in Microsquirt V3? It runs OK as it is with ignition inout ...

Now working perfectly. I replaced the Mazda coils with the built in ignitors with a ford coil pack and a bosch dual ignitor. It is now running very well. Using FIdle to control the standard PWN idle valve. Had to make a mod here, added a flyback diode. The idle control had very little span until I ...

thanks Grippo

Update

My coil packs are fried..

I scoped the ign out of the microsquirt and it does seem to be TTL. Tuner studio is set at ign out going low (normal) and with the engine not running and no pull ups the outputs are sat a 5v. Surely this is wrong? If the V3 does not have an extra transistor ...

Confused about v3 (plastic case) ign outs

Read this in the docs

"Spark Output (spkout_hi_lo) 0 equals spark when low (ground). V3 MicroSquirt®'s do not have a transistor for ignition control on the daughter card. As a result, if you are using a V3 MicroSquirt-II®, the Coil Charging Scheme may need ...

Thanks, I'll add that to my list of things to try tonight. I already split the comms leads out of the harness to keep them as far away as possible from noise and added suppression capacitors on the coil pack but right now I'll give anything a try.

It appears that the current release version and beta are the same version, V1.10 & 4.58Mb. Or am I being dumb after a day of snorting carbon monoxide?