This circuit is from 1964 documentation but can be easily implemented based on current components. Input waveforms and detection are shown next to the diagram.
This indicator circuit used and game machines (arcades) to indicate that the machine is being...
This circuit fires at the touch of a sensor, passing its output from high to low in a time given by...
This circuit is from an English magazine from 1978. The circuit can be assembled with BC557, BC547...