This 9 V battery eliminator was found in Radio Electronics magazine from June 1966. The transistor is of medium power and must be equipped with a small heat sink.
This variable filter that lets frequencies from 500 Hz to 1500 Hz pass through was found in a...
This low-current control circuit has a lamp as a load, but can have other types of devices, such...
The presented circuit consists of a double phase shift oscillator capable of generating two sine...