Ward call device circuit diagram
Source: InternetPublisher:念慈菴 Keywords: Circuit diagram device circuit ward call light emitting diode Updated: 2021/10/27
This circuit is made of two ICs, and its characteristic is that a pair of wires can replace the call connections of 10 rooms. Each room number is indicated by a light-emitting diode . When the call switch is pressed, the light-emitting diode displays the room number accordingly and emits a sound.
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