Once timer controller 5

Published:2011/8/8 21:10:00 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 3-87. Power supply circuit is composed of the power switch Sl, fuse FU, power transformer T, rectifier diodes VDl-VD4, filter capacitors C4, C5, and three-terminal voltage regulator integrated circuit ICl. Timing control circuit is composed of the time-base circuits IC2, 1C3, resistors Rl-RlO, capacitors Cl-C3, potentiometers RPl, RP2, transistors Vl-V4, light-emitting diodes VLl, VL2, diode VD5, manual discharge button S2, function selector switch S3 and the relay K.



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