Results tagged #Audio Oscillator in Circuits

Generating variable audio frequencies with crystal precision is not often done because it isn`t easy to make. Low frequency quartz crystals ...

This circuit is designed as a pocket sized high performance audio oscillator. This circuit can operated using battery operated version was p...

The output of this circuit should be fed into a high-impedance load, say >100K, remembering that the impedance of C4 is around 3K. A PNP tr...

Audio test oscillator audio test oscillator circuit, This generally results in a square wave if the frequency of oscillation is low enough r...

I am continuing to add DIY equipment to my home workshop. Audio oscillator is a very useful tool that is needed when we test audio projects....

This is a simple low-level noise maker that`s ideally suited to certain alarm applications. When the sounder is located in another part of ...

For use with low-power transmitters with a positive keying voltage. Q1/Q2/Q3 form a switching amplifier. When the key is pressed, the colle...

Two gates, U1A and U1B O/3 of a 4049 hex inveter), are connected in a VFO circuit. Components Rl, R3, and CI set the frequ...

This circuit mimics the dual-tone drone sound that"s produced by the unusual wind instrument. Urnjunction transistors Ql and Q2 are connect...

To obtain a 1000:1 Sweep Range, the voltage across external resistors Ra and Rb must decrease to nearly zero. This requires that the highest...

As a piece of test equipment, an audio oscillator has to be considered essential for anyone working in with hi-fi gear. Together with an aud...

As a piece of test equipment, an audio oscillator has to be considered essential for anyone working in with hi-fi gear. Together with an aud...