Two-way intercom doorbell circuit
Source: InternetPublisher:闪电杰克 Keywords: Intercom doorbell circuit BSP Updated: 2021/05/07
In rural areas, the courtyards are generally larger and it is inconvenient to call people outside the door. It is very useful to install a multi-functional intercom doorbell. When a guest of this kind of doorbell comes to visit,
as long as the button is pressed, the host can send out a music call signal . The host can pick up the receiver and the two parties can talk to each other. intercom doorbell
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