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Sound and oscillator circuit diagrams
December 28, 2010
The two circuits illustrate generating low frequency sinewaves by shifting the phase of the signal through an RC network so that oscillation occurs where the total phase shift is 360 degrees. The transistor circuit on... [more]
December 27, 2010
Here is a simple triangle/squarewave generator using a common 1458 dual op-amp that can be used from very low frequencies to about 10 Khz. The time interval for one half cycle is about R*C and... [more]
December 27, 2010
This is a basic 555 squarewave oscillator used to produce a 1 Khz tone from an 8 ohm speaker. In the circuit on the left, the speaker is isolated from the oscillator by the NPN... [more]
December 10, 2010
Oscilloscope testing module (huntron circuit) [more]
December 8, 2010
This circuit is intended for children fun, and is suitable to be installed on bicycles, battery powered cars and motorcycles, but also in models and other games. [more]
December 3, 2010
This circuit generates a two-tone effect very much alike the cuckoo sound. It can be used for door-bells or other purposes thanks to a built-in audio amplifier and loudspeaker. [more]
December 3, 2010
Built around a single 8038 waveform generator IC, this circuit produces sine, square or triangle waves from 20Hz to 200kHz in four switched ranges. [more]
December 2, 2010
Producing low-distortion sine waves, this oscillator operates over the range 16 to 22000 Hz. [more]
November 30, 2010
This circuit uses a UM3561 IC to produce four different sound effects [more]
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