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Threads 1 to 30 of 11034

Forum: Hobby Circuits and Small Projects Problems

Hobby Electronics Circuits, circuits samples, electronics in house and in cars, amplifiers, subwoofers, trasmitters, receivers, generators, meters.

  1. Sticky Thread Sticky: Read this before posting.

    Started by pranam77, 21st August 2009 09:14
    • Replies: 0
    • Views: 25,339
    21st August 2009, 09:14 Go to last post
  1. Closed: Digital oscilloscope Project

    Started by ze_dib, 18th February 2003 13:33
    25 Pages
    1 2 3 ... 25
    • Replies: 490
    • Views: 423,068
    14th December 2011, 14:51 Go to last post
  2. Closed: Help re-creating a replica movie prop

    Started by skarkowtsky, 9th October 2018 20:30
    10 Pages
    1 2 3 ... 10
    • Replies: 184
    • Views: 12,781
    10th April 2019, 09:25 Go to last post
  3. Closed: TIP31 feeding about 25 leds (audiorhytm circuit)

    Started by Johanx2, 15th July 2016 04:07
    9 Pages
    1 2 3 ... 9
    • Replies: 160
    • Views: 11,041
    8th August 2016, 22:54 Go to last post
  4. Closed: Transistor tester schematic IC

    Started by snaper, 12th April 2004 23:53
    8 Pages
    1 2 3 ... 8
    • Replies: 153
    • Views: 88,578
    1st May 2010, 19:56 Go to last post
  5. Closed: i need 12V DC to 220V AC inverter circuit

    Started by ehsanelahimirza, 10th October 2006 22:28
    8 Pages
    1 2 3 ... 8
    • Replies: 142
    • Views: 143,295
    3rd May 2012, 18:25 Go to last post
  6. Closed: Help with 24 led light powered by 12 Volt car battery

    Started by campus189, 14th May 2011 00:14
    7 Pages
    1 2 3 ... 7
    • Replies: 135
    • Views: 34,075
    20th January 2013, 08:49 Go to last post
  7. Closed: LRC meter software???

    Started by Borber, 2nd February 2004 11:18
    7 Pages
    1 2 3 ... 7
    • Replies: 120
    • Views: 61,908
    30th May 2013, 04:33 Go to last post
  8. Closed: Problem with a heartbeat monitor circuit

    Started by aredhel, 22nd June 2008 05:12
    6 Pages
    1 2 3 ... 6
    • Replies: 119
    • Views: 25,532
    30th June 2010, 16:35 Go to last post
  9. [SOLVED]Closed: How many LEDS Off a 555

    Started by Englewood, 17th July 2015 23:08
    6 Pages
    1 2 3 ... 6
    • Replies: 119
    • Views: 10,329
    9th August 2015, 21:35 Go to last post
  10. Closed: SWITCH MODE ARC INVERTER WELDER SCHEMATIC

    Started by cae20452, 1st March 2006 22:18
    6 Pages
    1 2 3 ... 6
    • Replies: 103
    • Views: 284,514
    9th June 2015, 21:09 Go to last post
  11. Closed: How can i make a PCB at home ?????

    Started by ahmad_abdulghany, 7th April 2006 07:33
    5 Pages
    1 2 3 ... 5
    • Replies: 96
    • Views: 30,863
    12th July 2009, 20:53 Go to last post
  12. Closed: frequency meter pic led display

    Started by megamicro, 24th January 2003 16:05
    5 Pages
    1 2 3 ... 5
    • Replies: 92
    • Views: 89,456
    13th October 2010, 01:46 Go to last post
  13. Closed: 12VDC / 220VAC 100Watt inverter

    Started by sipa, 23rd September 2004 23:04
    5 Pages
    1 2 3 ... 5
    • Replies: 90
    • Views: 122,540
    20th July 2012, 18:15 Go to last post
  14. Closed: Need a short beep circuit

    Started by Kolero, 14th December 2010 18:36
    5 Pages
    1 2 3 ... 5
    • Replies: 90
    • Views: 10,908
    7th January 2011, 07:45 Go to last post
  15. Closed: 1000 watt pure sine wave inverter

    Started by reynier1223, 19th June 2012 06:17
    5 Pages
    1 2 3 ... 5
    • Replies: 81
    • Views: 29,147
    31st August 2012, 11:47 Go to last post
  16. Closed: 1500W Inverter Full Schematics And Pcb

    Started by cae20452, 28th February 2006 17:19
    4 Pages
    1 2 3 ... 4
    • Replies: 79
    • Views: 145,871
    30th August 2012, 07:44 Go to last post
  17. Closed: Active audio filter doesn't work

    Started by David Kosman, 8th November 2015 17:42
    4 Pages
    1 2 3 ... 4
    • Replies: 77
    • Views: 6,742
    22nd April 2016, 01:34 Go to last post
  18. Closed: Requirements for GSM jammer design

    Started by arunragavan, 15th January 2005 08:34
    4 Pages
    1 2 3 ... 4
    • Replies: 70
    • Views: 70,392
    6th September 2010, 17:38 Go to last post
  19. Closed: Transformer 230/12V and buzzer

    Started by kokosz, 17th July 2012 12:46
    4 Pages
    1 2 3 ... 4
    • Replies: 70
    • Views: 7,062
    24th July 2012, 18:41 Go to last post
  20. Poll: Closed: My 1 transistor FM Super-Regen Receiver!

    Started by transistor495, 6th January 2009 12:06
    4 Pages
    1 2 3 ... 4
    • Replies: 69
    • Views: 44,045
    18th March 2015, 22:02 Go to last post
  21. Closed: Super LED Light 60LEDs@3.2V & 20mA on 9Volts

    Started by Dulimir, 27th October 2011 19:00
    4 Pages
    1 2 3 ... 4
    • Replies: 69
    • Views: 6,366
    22nd November 2011, 17:21 Go to last post
  22. Closed: Velleman K7200 or simular

    Started by kyndal, 4th September 2003 01:07
    4 Pages
    1 2 3 ... 4
    • Replies: 68
    • Views: 36,522
    19th June 2014, 23:08 Go to last post
  23. Closed: Problem with wireless serial transmisson

    Started by gaurav_sharma132, 22nd May 2009 09:06
    4 Pages
    1 2 3 ... 4
    • Replies: 66
    • Views: 13,751
    7th October 2011, 20:46 Go to last post
  24. Closed: Design of a 10kW Inverter for a fuel cell

    Started by Mr.Cool, 19th September 2004 18:36
    4 Pages
    1 2 3 ... 4
    • Replies: 65
    • Views: 37,304
    22nd June 2012, 05:50 Go to last post
  25. Closed: Communication based Project

    Started by CMOS, 3rd July 2004 18:36
    4 Pages
    1 2 3 ... 4
    • Replies: 64
    • Views: 41,446
    7th May 2013, 11:21 Go to last post
  26. Closed: Radio Shack sound level meter

    Started by Kekkaishi, 10th July 2008 00:11
    4 Pages
    1 2 3 ... 4
    • Replies: 62
    • Views: 15,028
    6th April 2009, 16:30 Go to last post
  27. Closed: how the china made handhold light items run on coin or on even button cells ?

    Started by rajaram04, 15th March 2013 22:41
    3 Pages
    1 2 3
    • Replies: 57
    • Views: 3,817
    21st March 2013, 03:06 Go to last post
  28. Closed: Remove AC hum from FM transmitter power supply

    Started by boylesg, 25th April 2018 15:13
    3 Pages
    1 2 3
    • Replies: 54
    • Views: 6,588
    5th May 2018, 20:12 Go to last post
  29. Closed: Help me build FM receiver with sharp frequency adjustments

    Started by gupta, 12th December 2004 08:03
    3 Pages
    1 2 3
    • Replies: 51
    • Views: 33,906
    28th September 2010, 01:41 Go to last post
  30. [SOLVED]Closed: Circuit for testing a x-tal

    Started by hafrse, 22nd June 2013 10:41
    3 Pages
    1 2 3
    • Replies: 51
    • Views: 3,964
    3rd July 2013, 19:28 Go to last post