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Two Tone Generator
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may not be copied, reproduced, distributed or displayed without his express written permission.

This two-tone generator includes 3 ICs NE555 Astable Multivibrators. You can vary the duration of each tone by changing the 10k resistor or 100MF capacitor at IC1 or changing resistors and capacitors at IC1/2 for higher or lower tone.

More:  Timer Circuits;   Audio Tone CircuitsBeepers;   DoorBell Circuits
Click on Schematic to view PDF

Got Designs?
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if you want me to link to and/or post your original design Thanks.


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