Dual tone telephone dialing display circuit diagram
Source: InternetPublisher:赔钱虎 Keywords: power display power supply Updated: 2021/06/09
The dual-tone telephone dialing display circuit is shown in the figure below. This dual-tone telephone dialing display circuit consists of a fixed-pole circuit (D1~D4, R1, R2, DW), a dual-tone decoding circuit (MC145436), and a BCD code conversion circuit (inverter A, B, two-input gate C, D), shift display circuit (IC4, IC5, IC3, IC2, IC6~IC21) and other parts.
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