Timing circuit composed of PUT lamp

(1) Introduction to circuit principle As shown in Figure 3-36, it is a timing circuit composed of PUT and so on. It is composed of PUT, etc. o. Ss～Imin
time variable timing circuit. The anode and cathode of the PUT are biased by a fixed resistor
Rz and an island voltage divider. The timing time is determined by the capacitor Cl and resistor (RRPl + R,) connected to the door . The base current of the drive transistor VT1 of the relay K is determined by the motor, R4 and R5, so that the PUT
is turned on and the network is connected with the timing. No prizes for setting the resistor . The charge on the capacitor cj
is discharged through VT2 and wind, and the diode vI)1 is used to
compensate the temperature characteristics of the PUT. After reaching the set time of the circuit
, PUT turns on and works. VT1 is also turned on. At the same time,
the charge on cl is instantly discharged and enters the reset state.
After the power is turned on again, the timing work function remains unchanged.
After the timing time is reached, PUT is turned on and relay K acts again. If
∞ is IoOptF and RRI-I is 3Mt-2, then the minimum timing time
is determined by Ri. ~
    (2) Component parameter selection  The selection of components
is as shown in 罔3-36, there are no special requirements. (3) The timing circuit
    composed of PUT, etc. is shown in Figure 3-36 .