Article View: sci.electronics
Article #21403Re: SRAM Battery backup
From: John Purbrick
Date: Tue, 16 May 1989 03:02
Date: Tue, 16 May 1989 03:02
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Recently I've seen huge (electrically, not physically) capacitors in the Digi-Key catalog. A whole farad! They have fairly high internal resistance (~50 ohm) but to keep a trickle going into a memory chip, which is what they're designed for, they should be OK. Whether something like this would do the job depends on how long the system has to be kept alive without being plugged in, which would recharge the cap of course.
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!ucbvax!bloom-beacon!hermes!jpexg From: jpexg@hermes.ai.mit.edu (John Purbrick) Newsgroups: sci.electronics Subject: Re: SRAM Battery backup Summary: How about mega-capacitors? Message-ID: <3363@hermes.ai.mit.edu> Date: 16 May 89 03:02:26 GMT References: <657@serene.UUCP> <1989May15.043845.25572@utzoo.uucp> Organization: MIT AI Lab, Cambridge, MA Lines: 7