wide range timing switch circuit

Published:2011/5/19 1:20:00 Author:TaoXi | Keyword: wide range, timing switch | From:SeekIC

The wide range timing switch circuit This circuit uses the monolithic time transmitter circuit XR2242, the timing range is from few milliseconds to few days. This circuit is composed of a time-based oscillator, a 8-bit binary counter and a control trigger. The time-base circuit is composed of the resistor R and capacitor C, there are three kinds of output pulse time: T=RC (pin 8), T=2RC (pins 2) and T=128RC (pin 3). Through the additional voltage, we can make the output automatic reset. By using the positive edge of the trigger input port pulse, we can start the time process.



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