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Groups > sci.electronics.misc > #4666
| From | Michael Black <et472@ncf.ca> |
|---|---|
| Newsgroups | sci.electronics.repair, sci.electronics.misc, sci.electronics.components, sci.electronics.basics, aus.electronics |
| Subject | Re: Ahmed Mohamed |
| Date | 2015-09-25 23:15 -0400 |
| Organization | National Capital Freenet, Ottawa, Ontario, Canada |
| Message-ID | <alpine.LNX.2.02.1509252309590.22814@darkstar.example.org> (permalink) |
| References | <fpib0b1ruh4p5k9i424lqbq7oq1ksssrj4@4ax.com> |
Cross-posted to 5 groups.
On Fri, 25 Sep 2015, Seymore4Head wrote: > I assume everyone has heard of this kid and his clock. > http://truthuncensored.net/wp-content/uploads/2015/09/ahmed-mohamed-clock.jpg > > The picture of the clock shows a 9V battery hookup but no battery. > That means the kid either had to plug the clock in or it does have > batteries that are not shown. > First, all he did was take the innards out of a commercial clock and transplant them into his own box. People actually built digital clocks in the late sixties and early seventies, wiring up all that TTL and readouts. Then National and some other companies came out with LSI that put most of the circuitry in one large IC, and that caused more building, though it was simpler. After a while, endless companies were selling "clock kits" with the ICs and readouts and other few needed parts. Then by the late seventies, nobody did it that way, National (at least) had clock modules that one just had to wire to a transformer and switches, and put in a box. Godbout probably sold a lot of those. Then virtually nobody built clocks, it was easier if you needed the function to either get one of those modules, or buy a clock radio at a garage sale and use the clock from that. Gee, in the early seventies one could buy digital watch kits, that was just following instructions, but more work needed than this kid and his clock. The 9v battery was surely there to keep the time when the power went off. The clock doesn't run from that battery. (And thinking about it now, if the photo came from the cops, maybe they detached the battery "to be safe"). > If we assume that there are no batteries, can this clock store it's > alarm time? I say no, but I don't know. > If the clock has no power whatever, then of course it can't keep time. > If not, that means that the kid had to plug the clock in during class > and also program it to alarm. The clock can not accidentally go off > without battery back up. Right? > > If it's plugged into the wall, it doesn't need the battery. Michael
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Ahmed Mohamed Seymore4Head <Seymore4Head@Hotmail.invalid> - 2015-09-25 18:41 -0400
Re: Ahmed Mohamed Cursitor Doom <curd@notformail.com> - 2015-09-25 23:53 +0000
Re: Ahmed Mohamed "Tom Del Rosso" <fizzbintuesday@that-google-mail-domain.com> - 2015-10-14 16:08 -0400
Re: Ahmed Mohamed BuckyBalls <"The Pres"@yahoo.com> - 2015-10-16 14:25 +0200
Re: Ahmed Mohamed Michael Black <et472@ncf.ca> - 2015-09-25 23:15 -0400
Re: Ahmed Mohamed "Ian Field" <gangprobing.alien@ntlworld.com> - 2015-09-27 18:23 +0100
Re: Ahmed Mohamed Oltimer <nup@nup.com> - 2015-09-26 19:08 +0800
Re: Ahmed Mohamed Michael Black <et472@ncf.ca> - 2015-09-27 13:33 -0400
Re: Ahmed Mohamed Oltimer <nup@nup.com> - 2015-09-28 21:00 +0800
Re: Ahmed Mohamed mjb@signal11.invalid (Mike) - 2015-09-28 15:14 +0100
Re: Ahmed Mohamed keithr0 <user@account.invalid> - 2015-09-29 17:43 +1000
Re: Ahmed Mohamed Seymore4Head <Seymore4Head@Hotmail.invalid> - 2015-09-29 12:32 -0400
Re: Ahmed Mohamed N_Cook <diverse@tcp.co.uk> - 2015-09-26 16:23 +0100
Re: Ahmed Mohamed Don Bruder <dakidd@sonic.net> - 2015-09-26 09:07 -0700
Re: Ahmed Mohamed amdx <nojunk@knology.net> - 2015-09-27 06:33 -0500
Re: Ahmed Mohamed Oltimer <nup@nup.com> - 2015-09-27 22:18 +0800
Re: Ahmed Mohamed colonel_hack@yahoo.com - 2015-09-28 10:26 -0700
Re: Ahmed Mohamed "Ian Field" <gangprobing.alien@ntlworld.com> - 2015-10-25 19:34 +0000
Re: Ahmed Mohamed Michael Black <et472@ncf.ca> - 2015-10-30 17:14 -0400
Re: Ahmed Mohamed Seymore4Head <Seymore4Head@Hotmail.invalid> - 2015-11-01 22:05 -0500
Re: Ahmed Mohamed news13 <newsthirteenspam-spam@woa.com.au> - 2015-11-02 11:52 +0000
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