This TTL decoder circuit for PC ports was found in a document from 1992. The power supply can be PC's own circuit.
To turn on the configuration of CIR106E using a “’1" logic level, the circuit is given here. To...
This circuit was found in a Popular Electronics of the 90s. It operates a third brake light that...
This circuit is from a current regulator up to 1 A, ie a constant current source. The LM320...