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Old 11th May 2018, 2:33 am   #8
Join Date: Apr 2018
Location: Newbury, Berkshire, UK.
Posts: 367
Default Re: Tesla MH74S571 programming.

That design is indeed the SOC programmer grafted onto an arduino! When I drew that up I was assuming the Tesla chip was the same as the NS one. If the programming voltage is 21v the 4000 series logic will have a very short, eventful life!

I will have to rethink it, probably using discrete transistors or mosfets to do the voltage level conversions, and while I'm at it I might as well do all the timings in the microcontroller rather than relying on RC circuits. This will make it simpler and allow the timings to be easily tuned.
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