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Please help on DTMF Generator Design

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Weis Guy

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Anyone knows how to create DTMF generator without using a package IC for tone generation..using only basic components!
 

aldevan

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you can genenaton using microcontroller, I have exemplo with at89s8252 (8051)
and 2 resistor, if you want it tell me a send you
 

fredsm

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Easy. Use the components from an old 2500-type touchtone pad.
Two inductors, a couple of transistors,. and a few caps and resistors.
<als>
 

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