This circuit allows you to adjust the balance between channels of a stereo amplifier. The circuit makes use of an analog indicator with zero in the center of the scale.
This circuit can be used as a shield for microcontrollers such as the Arduino. Frequency is given...
This PWM circuit was found in an American publication in 1978. It consists of a simple control that...
This circuit was found in 1968 General Electric documentation. The circuit uses components from the era...