3-tons audiooscillator

3 Tone Audio Oscillator is a simple circuit which will generate audio tone on the press of a button. This circuit can be very useful as test equipment for audio equipments or as a signal source for an audio input.

* Input - 12 VDC @ 100 mA

* Output - Speaker, 8 ? / 0.25 W

* Three switches produce 1.2 KHz, 725 KHz and 325 Hz

* Terminal pins for supply voltage and speaker connection

* Power-On LED indicator

* Four mounting holes of 3.2 mm each

* PCB dimensions 42 mm x 48 mm