Article View: sci.electronics
Article #20373Re: Bright LEDs, visible infrared? Colored Chips?
From: Bulent Abali
Date: Tue, 10 Jan 1989 17:01
Date: Tue, 10 Jan 1989 17:01
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>>Light does affect many chips creating surface charge carriers. I have even >>seen circuits where the leakage current caused by light in glass encased small >>signal diodes (1N914, 1N4148) caused erratic behavior. I even saw a RAM chip Back in the old times when phototransistors were expensive, I would saw off the top of the metal case of a regular transistor with a file, and that would give me a pretty good phototransistor. -=- Bulent Abali Ohio State Univ., Dept.of Electrical Eng. 2015 Neil Av. Columbus, Ohio 43210 abali@baloo.eng.ohio-state.edu
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!lll-winken!ames!nrl-cmf!mailrus!tut.cis.ohio-state.edu!accelerator.eng.ohio-state.edu!phao.eng.ohio-state.edu!abali From: abali@phao.eng.ohio-state.edu (Bulent Abali) Newsgroups: sci.electronics Subject: Re: Bright LEDs, visible infrared? Colored Chips? Keywords: Colour, Chips, Larry Lippman, Cats Message-ID: <1386@accelerator.eng.ohio-state.edu> Date: 10 Jan 89 17:01:18 GMT References: <743@optilink.UUCP> <888@ubu.warwick.UUCP> <1590@kodak.UUCP> <435@brambo.UUCP> Sender: news@accelerator.eng.ohio-state.edu Reply-To: abali@phao.eng.ohio-state.edu (Bulent Abali) Organization: Ohio State Univ, College of Engineering Lines: 16