Wien-Bridge Audio Oscillator Circuit

The first BC109C transistor (on the left side) functions as a buffer, offering the circuit a high input impedance of approximately 250k ohms and a voltage gain slightly less than unity. As the Baxandall tone control circuit is a...

This circuit gradually illuminates a 120VAC lamp over an approximate 20-minute period. A bridge rectifier converts the AC voltage to 120V DC, supplying power to the MOSFET and the 60-watt lamp. A 6.2K, 5-watt resistor along with a Zener...

It is the essential continuity of circuits Sel 8 Sources and Up/Down Sel 8 Sources, but can work and autonomously, collaborating with any suitable circuit of control. The Relay 1-8 can be 6-24v DC. For current of collector of...

Here are some utility circuits for use with the Ramsey FM10a, and other small FM stereo transmitter kits. This information may be helpful for setting up a micro powered FM radio station. The FM10a and similar kits tend to...

This document discusses a voltage stabilizer circuit utilizing the ICs 7815 and 7915, which requires an input voltage range of 17.5V to 50V. The output of this circuit consistently provides a regulated 15V output voltage. The stabilizer is further...

There are various configurations for crystal oscillators, with the most common being discrete and integrated circuits like the Pierce and RLC Bridge. The discrete Pierce oscillator is a suitable choice when good frequency stability and a relatively simple circuit...