Two-tone-siren


Posted on Apr 4, 2012

This siren provides a constant audio output, but alternates between two separate tones. The LM13080 is set to oscillate at one basic frequency;


Two-tone-siren
Click here to download the full size of the above Circuit.

this frequency is changed by adding a 200-K!l charging resistor in parallel with the feedback resistor, R2.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Stereo PLL FM transmitter
Electric Heater Thermostat
LED Light Pen
sensors
Low Cost Monolithic Voltage-to-Frequency Converter
Electrical Single Line Diagram-Part One
The 555 Monostable
By the driving capacitive loads MAX4223 ~ MAX4228 circuit diagram



Top