This oscillator version is from an RCA documentation from the 1970s. Transistors support modern equivalents and the power can be supplied in a voltage range of 5 to 12 V. For Q2 we suggest the BD136.
Using LM3909 integrated circuits, this circuit was found in an American documentation from the...
This circuit was found in Popular Electronics. Its purpose is to warn the visually impaired when a glass...
Found in a 70’s documentation, this circuit can operate with signals up to 10 MHz. The operational...