Simple answering machine circuit
Source: InternetPublisher:奥特man123 Keywords: buzzer circuit register binary Updated: 2020/10/14
The working principle of the circuit: when a certain button is pressed, the binary digital code
is input into the 5-bit register IC 2 through the parallel input/output port , and then the parallel input port of the register is "locked" through the parallel enable terminal
(pin 8) of IC
2, so that No other data is allowed to be entered into the
register. Only after pressing the reset switch S can the stored numbers be deleted from the register
and other data can be received.
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