Parallel (LPT) port switching interface - SH · +12V 0V +5V +12V 0V 0V +5V 220 220 1N4148 2N2222 0V...

Preview:

Citation preview

+5V0V0V+12V+12V 0V +5V

220

220

2N2222

1N

4148

0V

+5V

PCB 1:1 Component layout

Parallel (LPT) port switching interface

U1

U1 - 12V twin relayopto - optocoupler

opto

to parallel port

Recommended