(copied from http://www.photonicsguy.ca/notes on 26Mar2012)

APC Environmental card

AP9512TH
IC1	LM35	Temperature Sensor
IC2	LM358N	Dual Opamp
IC3	LM78L	Vreg, 5V
BP1	TDK CHS-UGR	Humidity Sensor

AP9612
IC1	ADC0834	8-Bit Serial I/O A/D Converter with Multiplexer Option
IC2	MM74HC14N	Hex inverting Schmitt trigger
IC5	P87C521	Controller