This circuit is suggested by American documentation from 1970. It makes use of transistors of the time but can be implemented with modern equivalent transistors.
This indicator circuit used and game machines (arcades) to indicate that the machine is being...
We found this configuration in a 1974 technical documentation. It can test both TTL logic circuits and...
We found this circuit in a 1997 documentation. Its purpose is to turn a load on or off using...