Transistor time relay circuit 2
Source: InternetPublisher:containsmachine Keywords: Transistor time relay relay circuit power circuit Updated: 2020/09/16
Transistor time relay circuit 2
The power supply circuit of the stereo low-frequency amplifier is connected with a large-capacity filter capacitor. When this type of power supply is connected to the power grid,
the rectifier diode and transformer may be overloaded due to the large capacitor charging current. In order to avoid this accident, a time delay relay composed of a triode can be connected to the low
discharge power supply circuit .
The delayed power-on time is determined by Ri and cl. Usually there is a 1-2s delay.
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