Figure shows the general timing circuits with high reliability. The circuit regular time from 0.1 minutes to 99.9 minutes. Regular way for BCD counting type. Control state can plug regular power supply or CZ time. IC2 and IC3 for the cascade of the BCD counter / divider, K1 ~ K3 BCD decoding for the time selected by DIP switch, IC1 RS flip-flop and timing for the time base oscillator, AN timing control for the state selection. Connected to DC power supply, the circuit automatically cleared, the regular starting time, the relay J AN preset by the state work. If the regular time, A1 ~ A3 output high, R-S flip-flop to change state, J has changed state, the oscillator stops oscillating, LED is off, the end of regular time.