Found in 1980s documentation, this oscillator uses an integrated TTL Schottly. The supply must be made with 5 V.
This circuit can be used as an amplifier for musical instruments or even with your cell phone. The...
This circuit, which can act as a shield, was found in a 1970s American documentation. The...
This timer produces a continuous sound at the end of the timer set in potentiometer RV1. The...