This circuit activates an old cassette recorder when the phone is being used, thus making it possible to record the conversation. The circuit is from a Hands On Electronics from the 90s.
This 20 MHz bandwidth circuit was suggested by the National Semiconductor in 1970 documentation. Modern...
Found in a 1967 General Electric documentation, this circuit generates a ladder signal from...
September 2017 - Mouser Electronics is now offering Microchip MTD6508 engine drivers. These...