This circuit was found in an Elektor from the 90s. It is a circuit that generates different types of sound effects. The components are still common today.
This circuit is from European documentation from the 1980s. The circuit consists of an R-S...
Found in the documentation on PCs, this circuit excites LEDs whose current is determined by R3....
This simple SCR relaxation oscillator was indicated by a 90s Popular Electronics. The frequency is...