Primary timing controller 4

Published:2011/7/26 3:07:00 Author:Ecco | Keyword: Primary timing controller | From:SeekIC

The primary timing controller circuit is composed of the power regulator circuit, timing time selection circuit, Schmitt trigger control circuit and delay circuit, and it is shown in Figure 3-86. Power supply regulator circuit consists of the start button Sl, power transformer T, bridge rectifier UR, filter capacitor Cl and three-terminal voltage regulator integrated circuit ICl. Timing time selection circuit is composed of selector switch S2 and resistors Rl-R7. Delay circuit consists of capacitors C2, C3, resistors R9, RlO, normally closed contacts K3, K4 of relay K and NOT gate integrated circuit IC2 (Dl-D4).



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