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Electronics_101 · Electronics Learning Group
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Group Information

  • Members: 5298
  • Category: Electronics
  • Founded: Mar 6, 2001
  • Language: English
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Activity within 7 days:

17 New Members - 208 New Messages - 2 New Files - New Questions

Description

Discussion of electronics for beginners and experienced alike. Hopefully we can all exchange ideas, circuits, schematics, and pictures of all disciplines of electronics including both analog and digital.

Also visit the Homebrew_PCBs list for information on making printed circuit boards: Homebrew_PCBs

Please note, this is -not- a job posting board.

Most Recent Messages

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Re: Red LED on the end of a wire
Many thanks, yep it sounds like using a 555 timer to make a PWM signal is a better option per battery life. I'll do some searching for an exact circuit that
Posted - Fri Dec 5, 2008 5:32 am
 tony8fs
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Diode and its mount
I'm building this microwave detector: <http://www.atvinderby.co.uk/2.4Ghz_SWR_Meter.htm> Note the anode end of the diode: it is not soldered to the antenna
Posted - Fri Dec 5, 2008 5:04 am
 davec
davec2468
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Re: Red LED on the end of a wire
Calculate the series resister as per normal as if the LED is connected directly to the power supply (which is what will happen when the pot is turned to 0
Posted - Fri Dec 5, 2008 3:24 am
 James Bishop
jim124816
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Re: Specs on input signal to PC sound card
If the sampling frequency of your sound card is 44.1 kHz than the maximum frequency you can recover from your sampled data is 22.05 kHz, 1/2 of your sampling
Posted - Thu Dec 4, 2008 11:25 pm
 Howard Hansen
hrh1818
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Re: Red LED on the end of a wire
... This is getting *way* too complicated... Look at this circuit here: http://www.dprg.org/tutorials/2005-11a/index.html which is shown driving a motor, but
Posted - Thu Dec 4, 2008 7:03 pm
 Roy J. Tellason
rtellason
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Message History

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2008 647 665 810 457 564 686 624 713 573 452 471 109
2007 681 500 640 342 338 392 401 379 348 485 398 575
2006 808 1018 1290 1027 710 1119 1255 1380 919 1353 649 964
2005 556 370 556 854 663 856 1409 1198 813 543 689 894
2004 732 340 509 663 769 859 524 674 401 605 442 553
2003 183 137 213 213 153 184 242 176 418 331 332 633
2002 199 138 152 269 168 198 154 311 238 209 277 157
2001 17 21 27 19 56 104 35 874 799 190
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