|
Just playing around I programmed the LED on-temperature indication to illuminate at set point +/- 0.2C, and, it remained on and steady. I don't know, but that doesn't seem too bad for a cooled DSLR. I suspect it will do better with aref 3.3v - a bit more accurate than the present 5v.
I have sourced a heatsink to replace the ugly looking thing, that hangs off the coldfinger. Lower profile and will take 2 x 50 or 60mm fans.
Code calculates a target pwm value to maintain setpoint and then drives TEC 100% duty cycle to setpoint. After that pwm value is recalibrated based on any temperature differential from setpoint and dithered either side of setpoint.
Last edited by rcheshire; 04-11-2013 at 08:36 AM.
|