Corridor lighting circuit controlled by counter delay

Corridor lighting circuit controlled by counter delay

Circuit working principle: When the circuit is powered on, the 555 time base oscillator starts to oscillate, and CC40161 is cleared by the integrating circuit
composed of R3 and C5 , and enters the counting state. Relay K is powered on, K-1 is closed, lighting lamp H is on, and K-2 normally closed contact is disconnected, and the E terminal of C C40161 becomes high level.