Circuit Breakers - SwitcherBasically this is a circuit composed by multivibrator transistor Q1 and Q1, the time required to activate the relay is determined by C1 and C2, of which it gives a fairly broad range microfaradios so you can experiment with the opening and closing times of doing adjustment with R1 and R2 (potentiometers), you can use a potentiometer to double that adjustment is accurate.
List of components
C1, C2: 10 to 1000 µF. electrolytic
C3: 100 µF. electrolytic
Q1, Q2: BC548
R1, R3: 3.9K
R2: 1 K
VR1, VR2: 47 K
RL1: Relay, coil-over should consume no more than 100 mA. and be consistent with the voltage.
pcb expensive components print
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