This circuit that generates a special sound was found in a Popular Electronics from the 90s. The base is the 555 and the transistors admit equivalents, and a power stage can be added.
This integrated amplifier was found in a non-existent British magazine from 1975. The used...
This multiple cable test sequential circuit was found in Radio Electronics. The connector must be...
A negative pulse applied to the input of the circuit shown in figure bellow turns on the relay....