Highly reliable universal timer circuit composed of CD4060B

(1) Introduction to the circuit principle As shown in Figure 3-19, the CD4n60B structure is used. Highly reliable universal timing circuit. The timing time of this circuit is
ls-lh, controlled by switch S2 in three levels, that is, when the target is set to l, the timing time is 1-20si. When S2 is set to 2, the timing time is l5-320s*
When S2 is set to 3, the timing time is 4 ~85nun. The circuit can use RP to calibrate the timing time. The timing method is counting type. CD4060B is a binary
14-level counter. When sl turns from 1 to 2, the circuit is automatically cleared, the timer starts, J does not move, the normally closed contact Jl is connected, and
there is voltage on the socket cz to supply power to the outside world. After the timing time expires, CD406013 outputs high level. The transistor vr is turned on, J is energized, the Jl contact is disconnected,
the cz power supply is cut off, and the timer ends.
    (2) Component parameter selection The selection of components is shown in Figure 3-19, and there are no special requirements.
    (3) The high-reliability universal timer circuit composed of CD4060 B is shown in Figure 3-19.