+5V 0V 0V +12V +12V 0V +5V 220 220 2N2222 1N4148 0V +5V PCB 1:1 Component layout Parallel (LPT) port switching interface U1 U1 - 12V twin relay opto - optocoupler opto to parallel port

Parallel (LPT) port switching interface - SH · +12V 0V +5V +12V 0V 0V +5V 220 220 1N4148 2N2222 0V +5V PCB 1:1 Component layout Parallel (LPT) port switching interface U1 U1 - 12V

Oct 25, 2020

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Page 1: Parallel (LPT) port switching interface - SH · +12V 0V +5V +12V 0V 0V +5V 220 220 1N4148 2N2222 0V +5V PCB 1:1 Component layout Parallel (LPT) port switching interface U1 U1 - 12V

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

220

2N2222

4148

+5V

PCB 1:1 Component layout

Parallel (LPT) port switching interface

U1 - 12V twin relayopto - optocoupler

opto

to parallel port