Once timer controller 6

Published:2011/8/8 21:13:00 Author:Ecco | Keyword: Once timer controller | From:SeekIC

The once timer controller circuit is composed of the power supply circuit and timing control circuit, and it is shown in Figure 3-88. Power supply circuit is composed of the power control button Sl, normally open contact Kl of relay K, buck capacitor Cl, discharge resistor Rl, rectifier diodes VDl-VD4, filter capacitor C2 and zener diode V. Timing control circuit consists of the time-base integrated circuit IC, time delay selection switch S2, resistors R2-R5, capacitors C3, C4, light-emitting diode VL, relay K and diode VD5. Rl select the 1/2W metal film resistor.



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