This simple continuity tester consists of an oscillator found in the 1983 Electronics Experimenter Special projects magazine. The circuit is powered by a single battery.
This circuit works with small 5 V incandescent lamps but can be modified to operate with LEDs. The...
This low power bass booster is from the 1977 National Semiconductor Audio Handbook. The circuit is...
This circuit is from an old documentation. Integrated circuit 723 is not common today. The power...