Timer switch circuit diagram

Published:2014/4/15 22:48:00 Author:lynne | Keyword: Timer switch circuit diagram, XR2242 | From:SeekIC

Monolithic circuit shown in FIG time transmitter circuit XR2242, timing time from a few milliseconds to a few days. The circuit comprises a time base oscillator, a binary counter 8 and a control trigger. Time base circuit by the resistor R and the capacitor C form, can have T = RC (pin 8). T = 2RC (pin 2) and T = 128RC (pin 3) three output pulse time by the applied voltage, the output can be reset automatically, use the flip-flop positive edge of the input pulse time can start the process. circuit output terminal (pin 6) voltage UA is low, so that the external action relays and other components. 6 may also be connected to the foot end of the R or S, the electric set or reset (switch S2 together). using the switch S1 can select the delay time. Timer switch circuit diagram shown in Figure:



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