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  • Category: Electronics
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Messages 1792 - 1821 of 1821   Oldest  |  < Older  |  Newer >  |  Newest
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1792 CharlesW
charleswenzel Offline Send Email
May 13, 2012
2:24 am
Yes, the PNP will give you the full 5 volts, so you have a little voltage to drop with the resistors....
1793 Looney
flyingby77 Offline Send Email
May 13, 2012
7:15 am
I have the questions, no shortage of that. From JB: "Currently, I am getting up to speed on Atmel microprocessors, including how they are programmed from the...
1794 CharlesW
charleswenzel Offline Send Email
May 13, 2012
8:49 pm
I prefer LTSpice simply for the easy interface. I like the GUI with as few "directive" lines needed as possible. Some people seriously pursue Spice and do some...
1795 JOS C
joeprice... Offline Send Email
May 13, 2012
9:44 pm
All, Anyone have a source for Soft Iron Wire about 3/16in/dia? I built up the oscillator circuit shown on the Techlib.com site under Circuits, Ray's wide band...
1796 jbrookes40 Offline Send Email May 13, 2012
11:07 pm
I have some caps - marked .032 100v on bag - they are shiny oblong chiclets of brown color - wires come out parallel to the long sides... Any ideas? Is there...
1797 onionman51 Offline May 14, 2012
1:50 am
Hi, There is a nice site that calculates the resistors needed for an LED array and shows you circuit diagrams for the various possibilities. ...
1798 jbrookes40 Offline Send Email May 14, 2012
2:22 am
Hi I believe you can also use Ohm's law to figure it out...If an led drops say 3 volt and needs 20 ma to light, then it has an effective resistance of 3/.020 =...
1799 onionman51 Offline May 14, 2012
2:31 am
18 ga black iron wire "Dead-soft annealed so bends easily, holds firmly. Not plated" A bit thinner than you requested, nice price? ...
1800 onionman51 Offline May 14, 2012
2:37 am
Maybe this is not the right material? Metallurgy was not my major! Lee...
1801 jbrookes40 Offline Send Email May 14, 2012
10:12 am
softness a pretty good determiner of iron vs. steel. Iron has a very high mp (3000 ?), and the temptation of smelters is to convert it into steel asap for that...
1802 alysson_demerel Offline Send Email May 15, 2012
7:24 pm
Soft iron wire should be less than 0.01 percent carbon, but for most electrical/electronic/magnetic purposes you can use mild steel that has been heated to...
1803 onionman51 Offline May 18, 2012
2:50 am
Thanks, I don't think the time in the shop has been wasted! I've learned a new term to throw around at heavy metal parties... "reverbatory furnace" ;-)...
1804 CharlesW
charleswenzel Offline Send Email
May 18, 2012
4:06 pm
That's an odd value. Can you snap a picture?...
1805 JOS C
joeprice... Offline Send Email
May 18, 2012
11:33 pm
All, I posted the same message on the ULF Group does anyone here have any thoughts on this subject. I need some help understanding E-Field probe (antenna)...
1806 Brooke Clarke
brookeclarke... Offline Send Email
May 19, 2012
1:07 am
Hi Joe: When talking about antennas it's important to look at the size of the antenna in relation to the wavelength of the signal. Ham antennas are typically...
1807 Steve
lauriecam2002 Offline Send Email
May 19, 2012
1:34 am
Brooke: The AMRAD links in your page are dead, but the antenna details can be found at http://www.arrl.org/files/file/Technology/tis/info/pdf/0109031.pdf ...
1808 Brooke Clarke
brookeclarke... Offline Send Email
May 19, 2012
2:07 am
Hi Steve: Thanks, I've added a link to the QST article. Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/Clarke4Congress.html...
1809 CharlesW
charleswenzel Offline Send Email
May 19, 2012
3:44 am
The E-field antenna just measures the electric field, like a non-contacting voltmeter. The trick is to stick some metal where the field is the one you want,...
1810 JOS C
joeprice... Offline Send Email
May 19, 2012
2:29 pm
Charles, Thank you for you explanation it provides valuable in-sight on improvements. While mechanical issues could be the problem because the dipole has three...
1811 Looney
flyingby77 Offline Send Email
May 24, 2012
12:31 am
Hi folks, Thanks for the help but I'm a little lost. If I may ask for a wee more help. I've been testing the circuit with just one red led and this led stays...
1812 CharlesW
charleswenzel Offline Send Email
May 24, 2012
2:45 pm
I would expect the 10 mH choke to have an orange band. Typically there's a fat silver band followed by brown, black, orange, and maybe a tolerance band of...
1813 onionman51 Offline May 24, 2012
3:49 pm
I'll take a first "stab" at your question, although others on this board have far greater experience with this circuit, and electronics in general. On your...
1814 onionman51 Offline May 24, 2012
3:50 pm
Make that a second stab ;-)...
1815 Looney
flyingby77 Offline Send Email
May 24, 2012
10:12 pm
Thanks for the quick replies! After reading your posts I searched again and found a different site telling me that it is a 10uh and not mH. Earlier search...
1816 Craig
siliconhillb... Offline Send Email
May 26, 2012
4:15 pm
I just bought a cheap Chinese digital manometer for use in the lab. It measures differential pressure in the 0 to 55 inch/water range. Also has units of psi,...
1817 Craig
siliconhillb... Offline Send Email
May 26, 2012
5:22 pm
... Another choice with maybe better latches that might resist "popping open" better. http://www.cheaperthandirt.com/47991-1.html...
1818 Jim
w4jbm Offline Send Email
May 26, 2012
6:02 pm
I'll second the idea. Although I seem to have no time for any hobbies these days, I am a bit of an amateur gunsmith also. If you browse Cheaper Than Dirt...
1819 CharlesW
charleswenzel Offline Send Email
May 26, 2012
10:40 pm
Those are really good prices!...
1820 CharlesW
charleswenzel Offline Send Email
12:17 am
I'm doing some housekeeping, so there might be some broken links here and there - let me know. I'm also "re-purposing" Area 50 into something more worthy of my...
1821 onionman51 Offline 1:35 am
Thanks, I'm sure generating and maintaining this site is a lot of work. I, for one, really appreciate access to all this information (and humor!). I'm sure...
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