This circuit turns your air conditioner or other appliance on and off in adjustable cycles to save energy. The circuit is from a 1983 Electronics Experimenter Handbook Special projects.
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...