Search found 98 matches
- Sun Jun 01, 2003 9:52 pm
- Forum: General Discussion
- Topic: Novel high voltage source
- Replies: 20
- Views: 9648
Re: Novel high voltage source
I've heard about the microwave clothes drier; 30% less time and 50% less power. (Or was it 50% time and 30% less power???) Always wondered how they would handle snaps & zippers grommets. (Maybe Grommit from "Wallace and Grommit" would know about grommets...)<p>Anything wire-like in a m...
- Fri May 30, 2003 11:57 pm
- Forum: General Discussion
- Topic: Battery charger
- Replies: 21
- Views: 9660
Re: Battery charger
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by Rodney: Gadgeteer, you are quite a bit off in your statements, especially on NiCads. Don't take my word for it, consult the experts such as one of the manufactureres or rcbatter...
- Fri May 30, 2003 12:20 am
- Forum: General Discussion
- Topic: Battery charger
- Replies: 21
- Views: 9660
Re: Battery charger
I neglected to mention HYSTERESIS; sorry 'bout that. Generally there is a tiny bit of feedback, so that once the control switches ON, it feeds back a little voltage to your "sense circuit" --- so that (on a car battery anyway) it charges to 13.8-15 volts, then remains off until the battery...
- Tue May 27, 2003 4:10 am
- Forum: General Discussion
- Topic: Hold reading on LCD meter readout
- Replies: 7
- Views: 4111
Re: Hold reading on LCD meter readout
Electronic Goldmine is currently selling WHITE SURFACE-MOUNT LED's for 49¢ each...<p> www.goldmine-elec.com <p>To add a HOLD button, we would need to know the circuit of your meter; you can't simply kill the CLOCK on the voltmeter chip, 'cause the display is almost certainly MUTLIPLEXED (so only cer...
- Tue May 27, 2003 4:02 am
- Forum: General Discussion
- Topic: Battery charger
- Replies: 21
- Views: 9660
Re: Battery charger
Gee, Will, you'll ruin your eyes! (Didn't your mom ever tell you that???)<p>You can also use an SCR to auto-charge batteries. If you full-wave-bridge-rectify the output of a transformer, you can connect it to the battery through the SCR; and simply power the GATE through a resistor, and have a zener...
- Tue May 27, 2003 3:49 am
- Forum: General Discussion
- Topic: Fuse for Fluke 8000A meter
- Replies: 7
- Views: 3863
Re: Fuse for Fluke 8000A meter
THe hard part is getting a good solder connection between the fuse-wire and the endcap. Easy to do on ONE end, but harder when you're re-assembling the SECOND end. Any "compromise" you might do, would be to LOWER the max current; besides, fuses almost always pop in the MIDDLE --- and deffi...
- Mon May 26, 2003 5:53 pm
- Forum: General Discussion
- Topic: Fuse for Fluke 8000A meter
- Replies: 7
- Views: 3863
Re: Fuse for Fluke 8000A meter
If you touch a hot soldering iron to a glass "littlefuse" for a few seconds, the metal end will just pop right off. You can then install a new fuse wire, either copper magnet wire (current subject to experimentation) or buy a cheap new fuse and cannibalize. That will get you a quick and ch...
- Mon May 26, 2003 5:39 pm
- Forum: General Discussion
- Topic: Battery charger
- Replies: 21
- Views: 9660
Re: Battery charger
NiThe general rule of thumb is to charge batteries at 1/10 their amp-hour-rate. Car batteries are usually in the 80-amp-hour range, so 6-10 amps is fine. Certain batteries DO take "quick-charge", but regardless of the battery type that will shorten the life . You can charge batteries eithe...
- Wed May 21, 2003 8:04 pm
- Forum: General Discussion
- Topic: led display
- Replies: 6
- Views: 4026
Re: led display
One or two might be fun to play with. Want a SASE?
- Tue May 20, 2003 11:51 pm
- Forum: General Discussion
- Topic: Rear View Mirror
- Replies: 12
- Views: 6356
Re: Rear View Mirror
How long do you have to pour alcohol (we assume isporopy 70%?) after you glue your fingers together?
- Mon May 19, 2003 11:58 pm
- Forum: General Discussion
- Topic: Equalizer
- Replies: 8
- Views: 4420
Re: Equalizer
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Are you sure? I should open the case, ignoring the huge lightning bolt and warning of high voltage on the back? <hr></blockquote>Heh heh --- it's never stopped me. They do that to avoid LEGAL stuff....
- Mon May 19, 2003 11:35 pm
- Forum: General Discussion
- Topic: Rear View Mirror
- Replies: 12
- Views: 6356
Re: Rear View Mirror
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>They cost $275 in 1980.<hr></blockquote>Holy cow! That's what the new electrochromic ones cost! I was aware of the "wedge-shaped-mirrors", but only the ones with the MANUAL lever; didn't k...
- Mon May 19, 2003 1:55 pm
- Forum: General Discussion
- Topic: Rear View Mirror
- Replies: 12
- Views: 6356
Re: Rear View Mirror
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Thanks for introducing a topic that was a step beyond dead<hr></blockquote>He he he! Hopefully it WAS a "step-beyond-dead"... ;) <p>The new Chryselors have the "electrochromic" m...
- Sun May 18, 2003 9:47 pm
- Forum: General Discussion
- Topic: Pager Application
- Replies: 14
- Views: 9226
Re: Pager Application
That would seem easy to "fry it" with a direct wired connection. And you would need "inside information" (IE schematic) for the connection... What kind of pager are we talking about --- maybe one that passes DTMF digits to a speaker? Perhaps a microphone (acoustic-modem-style) dr...
- Sun May 18, 2003 4:48 pm
- Forum: General Discussion
- Topic: 555 output in m.a
- Replies: 6
- Views: 3605
Re: 555 output in m.a
Having been on the "seeking end" of information quests, and so many times wishing that a gifted person would jump in with an appreciated answer, I suspect that most magazine and forum contributers simply enjoy lending a hand. This and the prospect of discussing electronics, which is genera...