MC34011 ringing circuit diagram
Source: InternetPublisher:天天都吃好吃的 Keywords: Power supply other power circuits Updated: 2020/04/12
The MC34011 ringing circuit is shown in the figure below. The carrier ringing signal sent from L1 and L2 is sent to the MC3401 ringing signal processing circuit (threshold detection, comparison frequency division, output amplification, etc.) after bridge rectification. Send a ringing signal to the buzzer from pin 39. The loudness of the buzzer is controlled by the K1 bell switch. When K1 is set to "1", it will sound; when it is set to "2", it will be quiet.
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