Jimmy, the two you are sending me are from first batch, correct? I also have the AVRISP MkII coming. Once I figure this much out (including what you said abut gate drive voltage and FET driver), I'm sure I would want more. Is it the similar cheaper price for quantity of 10?
After talking to Jimmy, I can start testing actual lux with various bulbs using my former destructive testing setup, vs. PS delivered voltage to PhD, vs. battery power to PhD.
Alan, is the file on your site "HotwireRegulatorAlpha.c" the most current version you are all using with AVR?
There isn't a second batch yet. Just the ones I have and am sending out. Lux, you are getting one fully populated baord with all the chips/bits, etc. The second board is just the empty board with the standard parts kit.
The populated board has the 47K resistor for the upper half of the sampling divider that Alan is using now. As well as a 1 Ohm resistor for the Gate current sence resistor. Before assembly was complete, I measured the resistance of the gate sense resistor (compensating for leads) and wrote it on the board. (0.98 Ohm). The only thing I didn't do on your board was the main current sense shunt. You have a shunt that you can solder in wires for.
PS. The board you have is completely reconfigurable for 5V gate drive or 12V (actuaqlly 11.2V) gate drive. You have all but the 100K versus 47K option and the 3014B/7812 option. But the One board already has the 3014B installed. So you don't need the 3014B. If you choose to enable the 12V regulator and set the 5V source to 12V instead of Vbat, you set up can do 40V with the FET installed. Be carefull near 40V though.
The 6mm wide, 2oz tracks should be good for ~15A with a 10 deg C rise.
Lux should be able to test the crap out of several bulbs.
One great interest of mine is the life of a bulb that survives 10 hours at 15VDC versus the life of a bulb driven at 15VRMS (25V, etc peak)