Path: 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

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