Rechargeable time relay circuit 2
Source: InternetPublisher:小胖友 Keywords: Time relay relay circuit BSP transistor Updated: 2020/11/27
Rechargeable time relay circuit 2
It is a long delay
circuit. When the capacitor C is 5000yF, the delay can
reach 1. 3h.
The transistor VTi and the voltage regulator tubes VS2 and VS3
form a constant current source to improve the delay accuracy. Press button SB, relay KA is closed, VTz is cut off, and VT3 is turned on. After
a delay, VTz is turned on, VT3 is turned off, and KA is released. Adjust the potentiometer RP to adjust the delay time.
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