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PC related electronic circuits

Extend your PC using these circuits

A Passive Ethernet Hub

Make your own Half Duplex Ethernet hub using several diodes and nothing more.... [read]

Computer Microphone

This circuit is adapter for PC which enables you to use electret microphones. It's an audio amplifier made of two BC547C.... [read]

R5000 Computer Interface

This is circuit diagram of a fully isolated interface allowing computer control of the Trio/Kenwood R5000 receiver.... [read]

RJ45 Network card to IR communication

This system, composed of two opto-insulated circuits, allows the data transmission per infra-red network device between two computers. For example, someone... [read]

VGA to TV Scart

This is a circuit converter from VGA in TV SCART connection... [read]