Hero-1 Sonar Transmitter Board

P102

Pin	Signal	Connected To	Notes
1		P101-3
2			No Connect
3	Start Timer	U105-2
4	SW-GND	Q102-E	Connected to Logic GND via trace
5		R101	Anode of opto-iolator
6	+12V Logic	Q101-E
7	Logic GND
8	Logic GND