Delay circuit with NE555 timer

Published:2012/9/13 21:43:00 Author:Ecco | Keyword: Delay circuit , timer | From:SeekIC

This circuit design was used to switch on device via a LED photocell arrangement (optocoupler) using components R1, C1, D1 and Q1. It produces a delay on powering up to ensure correct sequencing of certain equipment. A very simple delay timer using a single transistor and an R-C timing circuit.



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