Simple 6 or 9 V power supply (CB24317E)

This 1-transistor circuit for currents up to 50 mA was found in the August 1974 Radio Electronics magazine. The transformer is 50 to 200 mA.

| Clique na imagem para ampliar |

FET 300 mW transmitter (CB19444E)
This small FM transmitter for clandestine listening has a good range and should be powered by a 9...
Stereo-Three Input Mixer (CB14903E)
This circuit has a high input impedance and provides a good signal at its output. The power must...
Metronome (CB15081E)
This traditional metronome configuration uses unusual transistors in the original version, but it...