Cumulative timer circuit diagram

Published:2011/8/10 22:13:00 Author:Ecco | Keyword: Cumulative timer | From:SeekIC

The cumulative timer circuit consists of resistor R1 and spreadsheet internal crystal oscillator BC, and it is shown as the chart. R1 and R2 choose the metal film resistors: R3 ~ R5 select the 1/8W metal film resistors. C select the aluminum electrolytic capacitor with voltage being above 10V. VD1 ~ VD4 use the 1N4007 silicon rectifier diodes; VD5 uses the 1N4l48 or 2CK44A silicon switching diode. V1 and V2 use S9013 or 3DG6 silicon NPN transistors. Digital watchesse use the multi-function LCD digital watches.



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