Article View: sci.electronics
Article #19663Re: Build a "simple" timing device.
From: Christopher E. Piggott
Date: Tue, 06 Sep 1988 00:11
Date: Tue, 06 Sep 1988 00:11
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Would you explain to me how the delay function works on the 555? I have a few of them, as well as a few of the dual packages (did not know they make a quad version), and have been wanting to use one as a burglar alarm entry delay, but I don't understand the cooncept of R.C. components and how they work (question 1: what are the units, ohms and microfarads?) and how come it requires three pins to set the delay? /Christopher
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!husc6!uwvax!rutgers!mailrus!cornell!rochester!ritcv!cep4478 From: cep4478@ritcv.UUCP (Christopher E. Piggott) Newsgroups: sci.electronics Subject: Re: Build a "simple" timing device. Summary: How does the 555 work? Message-ID: <809@ritcv.UUCP> Date: 6 Sep 88 00:11:48 GMT References: <2283@m2-net.UUCP> <16629@apple.Apple.COM> Reply-To: cep4478@ritcv.UUCP (Christopher E. Piggott) Organization: Rochester Institute of Technology, Rochester, NY Lines: 8