Siren


Posted on Jun 18, 2012

This circuit uses one of the LM389 transistors.to gate the power amplifier on and off by applying the muting technique. The other transistors form a cross-coupled multivibrator circuit that controls the rate of the square-wave oscillator.


Siren
Click here to download the full size of the above Circuit.

The power amplifier is used as the square-wave oscillator with individual frequency adjust provided by potentiometer R2B.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

AIU - Analog Interface Unit
4 MHz Modulated Oscillator (2N4401)
RF Recieving Amplifier for 40MHZ
Digital Volt and Amp Meter
1 KW Watt Meter
Wideband high-frequency amplifier
Voltage - frequency conversion circuit
Imitation AURA-VA50 Amplifier
Accelerate the role of capacitance



Top