Delay pulling in relay circuit

Published:2011/8/29 2:26:00 Author:Jessie | Keyword: Delay pulling in , relay | From:SeekIC

If you want to get the delay circuit with long time and it iseasy to adjust,you should use the transistor to control relay current, and access RC on the base circuit, and the circuit is shown as the chart. If the supply voltage, capacitor, current amplification coefficient and the required pull-in power are known, you should select the appropriate relay coil resistance and voltage value in order to delay as long as possible. This time can be determined by the constant value of time.



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