johnhlee@cory.Berkeley.EDU (John Lee) (05/12/89)
Okay, to those who read my warnings and still feel the urge to build the
SD0809 digitizer, yet don't have the pinouts for the LM3900, here they are:
Pin 1 - IN1+ 14 - V+
2 - IN2+ 13 - IN3+
3 - IN2- 12 - IN4+
4 - OUT2 11 - IN4-
5 - OUT1 10 - OUT4
6 - IN1- 9 - OUT3
7 - GND 8 - IN3-
This is a QUAD Norton Operational-Amplifier part, and the '1', '2', etc.
designate the particular amp in the package the pins go to. There's no
particular choice for the first and second stage of the digitizer amp
circuit, just use whatever is most convenient to wire. 'V+' goes to +5
and GND goes to GND.
Remember: keep leads as short as possible, ground inputs of unused amps
and use shielding. Good luck!
---John Lee
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