 A Passive Ethernet Hub
Make your own Half Duplex Ethernet hub using several diodes and nothing more.
R5000 Computer Interface
This is circuit diagram of a fully isolated interface allowing computer control of the Trio/Kenwood R5000 receiver.
Computer Microphone
This circuit is adapter for PC which enables you to use electret microphones. It's an audio amplifier made of two BC547C.
VGA to TV Scart
This is a circuit converter from VGA in TV SCART connection
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