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 uses indicator lamps, as it was obtained from an American publication of the 90s. The...
This small unregulated power supply can supply voltages from 0 to approximately 9 V under a...
This circuit is from a 90s documentation. It has a hysteresis and uses a light sensing bridge. The...