Phase-shift oscillator


Posted on Jul 25, 2012

Circuit uses a simple RC network to produce an exceptionally shrill tone from a miniature speaker. With the parts values shown, the circuit oscillates at a frequency of 3 kHz and drives a miniature 2W speaker with ear-piercing volume. The output waveform is a square wave with a width of 150 µ$, sloping rise and fall times, and a peak-to-peak amplitude of 4 volts (when powered by 9 volts)


Phase-shift oscillator
Click here to download the full size of the above Circuit.

Current drain of the oscillator is 90 mA at 9 volts, and total power dissipation at this voltage is 01 watt, which is well below the 15 watts the 14-pin version will absorb (at room temperature) before shutting down.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Flyer
Intelligent trailing switch
Fender rhodes peterson vibrato preamp
Simple Electronic bell circuit using transistors
Electronic Head or Tail Circuit
Optional delay schematic division factor
Forklift battery circuit



Top