Article View: sci.electronics
Article #5705Re: Has anyone made any homemade valves (tubes), semiconductors ...
From: Myron A. Calhoun
Date: Sat, 11 Aug 1990 16:27
Date: Sat, 11 Aug 1990 16:27
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1365 bytes
In article <872@massey.ac.nz> GMoretti@massey.ac.nz (Giovanni Moretti) writes:
>And how about batteries with household chemicals (ie not sulphuric)
Almost 30 years ago my senior electronics lab project included a
one-transistor amplifier powered by what my write-up called a "P"
cell. I recall that it used a silver dime (yep, this was pre 1965),
a copper penny, a piece of ink blotter, and a couple drops of urine
(hence the name "P" or "Pee" cell!) Worked like a charm.
--Myron.
--
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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!news-server.csri.toronto.edu!rutgers!maverick.ksu.ksu.edu!harris.cis.ksu.edu!mac From: mac@harris.cis.ksu.edu (Myron A. Calhoun) Newsgroups: sci.electronics Subject: Re: Has anyone made any homemade valves (tubes), semiconductors ... Summary: "P" Cell Keywords: urine Message-ID: <1990Aug11.162721.8034@maverick.ksu.ksu.edu> Date: 11 Aug 90 16:27:21 GMT References: <872@massey.ac.nz> <1205@gold.GVG.TEK.COM> Sender: news@maverick.ksu.ksu.edu (The News Guru) Distribution: na Organization: Kansas State University, Dept. of Computing and Information Sciences Lines: 14