Color TV main power protection circuit

This variable-frequency audio bandpass filter is constructed using two 741 operational amplifiers connected in cascade. The two 741 op amps are configured as identical RC active filters and are cascaded to enhance selectivity. The filter's tuning range spans from...

An AC to DC circuit converts sinusoidal alternating current into direct current. If the input signal is not sinusoidal, such as a triangular wave, the distortion is significant. The relationship between the average value and the RMS value is...

Efforts were made to minimize the number of wire jumpers on this board, but space constraints arose due to the integration of the microcontroller and motor driver on a single board. The design would have been cleaner without the...

This topic continues the coverage of audio tone controls. The first entry started with a passive tone control circuit using different RC filter configurations and introduced an active filter. The second entry showed a fully designed 2-band active tone...

The purpose of this circuit is for research and education. Assistance is sought in acquiring components for simple RF circuits, as well as tutorials or schematics. The requester is facing challenges in locating quality resources for beginner-level RF circuit...

This dual-polarity, multivoltage power supply can be constructed with a minimal investment. The circuit utilizes 78XX and 79XX series voltage regulators, four 3-A diodes, a 24-30 V, 2-6 A transformer, and eight filter capacitors. The described dual-polarity, multivoltage power supply...