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Ø Required materials of DTMF DECODER:- Ø Chasis(1) Ø Breadboard(2) Ø IC L293D(1) Ø IC MT8870 Ø Ic 7805 regulator(1) Ø Simple LED(as indicator)(6) Ø Capacitor(6) Ø Carbon resistance of 10k ohm(4) Ø Carbon resistance of 1k ohm(6) Ø Carbon resistance of 100k ohm(3) Ø Oscillator(1) Ø Connecting wires Ø Four pin connector(6) Ø Battery of 9v with battery cap(1) Ø Mobile connector jack Ø Multi meter Ø Wire cutter |
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