Portable DTMF electronic dialer circuit diagram
Source: InternetPublisher:消失的歌 Keywords: Power supply other power circuits Updated: 2021/04/01
The circuit of the portable DTMF electronic dialer is shown in the figure below. This portable electronic DTMF dialer consists of two special dial circuits C1C9148 and other digital circuits. The electronic dialer mainly uses two dedicated dial circuits CIC9148. Each dial circuit can store 19 16-digit phone numbers, and two dial circuits can store 38 numbers.
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