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8-channel DTMF Link: Encoder

(Summer Circuits 2010 article)

Published in issue 403, July/August 2010

The DTMF encoder circuit shown here is based on the HT9200B tone generator device produced by Holtek and distributed by Futurlec among others. The encoder is complemented by a decoder elsewhere in this publication.

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Magazine July/August 2010
UK403 (USD 11.30)
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