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Re: Mosfet and HV coil burning µC

PostPosted: Mon Jun 17, 2019 9:06 pm
by rudy
What parts did you use? Mosfets and diodes? Do you have access to a scope? It's kind of hard to troubleshoot without one.

I would have a scope on it. See what happens at low rpm. The gradually increase. One concern I had about this project was timing. Not affecting the timing when communications happens. The ESP8266 is a great chip. Just not great for real time work.

Re: Mosfet and HV coil burning µC

PostPosted: Mon Jun 17, 2019 11:34 pm
by Pablo2048
If you need such fast and realtime response, then you need some special techniques - you are in (some sort of) multitasking environment in ESP8266. Show us your code first so we can take a look and suggest next steps...

Re: Mosfet and HV coil burning µC

PostPosted: Wed Sep 18, 2019 4:47 am
by BillM
Hi guys

I'm sorry I did not answer because I couldn't find the time these last months and I have not seen that there was answers

I want to try to figure out what's the issue with this project.

You asked me to see the code.

Image

As you can see I removed all my spark advance... code just to try if it worked fine and I did this.

I just make a 3ms high and a 7ms low power so that it makes 10ms pwm to simulate 6000 rpm
3 ms is enough to make a beautiful spark, when I added more time the MOSFET was hot but like this I remember it was almost ambient temp.

(low and high are reverted due to the driver)

If I remember right the last time I tried it it worked continuously for 10 minutes before it died.