[Open_electroporator] Culture Shock yardboard testing

[John Griessen]

On 06/21/2016 11:53 PM, Nathan McCorkle wrote:
> More time between pulses of the same pulse-width you're showing being used. So the coil voltage would return to a steady 0V.

That waveform shows a negative going pulse, then ringing around zero volts for about 5X the neg pulse time for
a duty cycle of 20% with full recovery by the transformer.   The horizontal lines in green are the zero levels.


> I am excited to see pulses being composed of PWM too, once you get an MCU connected to the transistor, for trying to reduce
> high-side voltage. Can you recommend a code compatible MCU I can buy to program pulse generation stuff here on my end (I know it's
> micropython but better to be as close to your setup, and those ST boards are often only $13, right)? I can look into the hardware
> timers that connect (via internal muxes) to GPIO for PWM... unless you've got that covered (I have plenty to do here otherwise as
> far as projects go).

Will that matter so much for just a 2 week delay?  I'll get a rev 1.0 board ready that soon possibly.
I will be using one of those $13 ST eval boards very soon and we can get one and send you a 2nd yardboard
version to test if you want that speed, but I'd rather test only one yardboard, (maybe send it to 2nd tester after first is 
done?), to confirm volts needed by real bugs, then go to all rev1.0 boards out there testing away in multiple locations.