PDA-100 Photodiode Array Spectrometer Hack
Deuterium and Tungsten Lamp Power Supply ASSY 062800
VOUT-A (Pin 2): High Voltage Level VOUT-B (Pin 1): D2 Fil Voltage (Preheat Current) VOUT-C (Pin 16): Thungsten Lamp Intensity VOUT-D (Pin 15): Set Teperature
20 Pin connector: (probably mostly feedback, no details yet): Pin 1 Pin 2: DAC Pin 3 Pin 4 Pin 5 Pin 6: R52 Pin 7: (5V?) Pin 8: GND Pin 9: Pin 10: goes to many resistors Pin 11: (5V?) Pin 12: Clock for HV Pin 13: Pin 14: DAC Pin 15: R? Pin 16: R? Temp something Pin 17: Pin 18: Pin 19: Pin 20: R54
To power the lamps: Pin 12 needs to powered with a CLOCK signal for the High Voltage transformer. Don't know the exact frequency (can someone measure, please?). Works for me with 20KHz.
Sequence to power the Deuterium: Set high voltage to about 25% (4V), LED NO/F lights up. Then turn "D2 Fil" up until NO/F light goes off, ignition flash, D/OK should light green. Then turn D2 Fil down to zero again.