Found in old documentation, this oscillator with the LM380 produces an audio tone in a speaker. Frequency is set in VR1.
Found in a Popular Elecronics from the 90s, this circuit appears in other versions in this section and...
This is one of many versions of the double T oscillator that the reader can find on this site...
This sensitive circuit was found in old documentation. The SCR can be any of the 106 series and...