Today, most telephone equipment use a DTMF receiver IC. One common DTMF receiver IC is the Motorola MT8870 that is widely used in electronic communications circuits. The MT8870 is an 18-pin IC. It is ...
The main principle of this circuit is to control appliances like light and fan using DTMF technology. By using this technology, One can control home appliances from anywhere. Generally, appliances ...
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