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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: Everything you wanted to know about soldering and desoldering but were afraid to ask

    Started by E-design, 2nd July 2013 08:01
    • Replies: 4
    • Views: 22,894
    Rattanee
    2nd August 2014, 19:26 Go to last post

  2. Sticky Thread Sticky: Read this before posting.

    Started by pranam77, 21st August 2009 09:14
    • Replies: 0
    • Views: 25,546
    pranam77
    21st August 2009, 09:14 Go to last post

  1. [moved] Video transmitter for TV

    Started by bodzio_stawski, 12th November 2019 19:11
    • Replies: 2
    • Views: 186
    bodzio_stawski
    Yesterday, 22:26 Go to last post

  2. Rectifier diodes with bypass capīs & gounding speaker basketīs

    Started by mikaelmark, 16th November 2019 12:31
    2 Attachment(s)
    • Replies: 12
    • Views: 461
    prairiedog
    18th November 2019, 13:40 Go to last post

  3. Solar Monitor Box PCB fix

    Started by Aussie_Brewster, 14th November 2019 08:42
    1 Attachment(s)
    • Replies: 1
    • Views: 178
    betwixt
    14th November 2019, 10:02 Go to last post

  4. Suggestions for Intercom Gateway

    Started by victorjohn9211, 14th November 2019 05:57
    • Replies: 0
    • Views: 73
    victorjohn9211
    14th November 2019, 05:57 Go to last post

  5. Heating a cuvette which is placed in a box.

    Started by Prem Arjun, 13th November 2019 17:47
    • Replies: 1
    • Views: 142
    wwfeldman
    13th November 2019, 18:04 Go to last post

  6. Help to build my auto disconnecting circuit.

    Started by mariah1902, 10th November 2019 18:33
    • Replies: 10
    • Views: 504
    mariah1902
    12th November 2019, 10:26 Go to last post

  7. Advice please making PCBs using Press n Peel film

    Started by ljcox, 5th November 2019 04:13
    • Replies: 6
    • Views: 578
    RushPCBUSA
    10th November 2019, 21:34 Go to last post

  8. Symmetric Source + 10V and -10V - help me !!

    Started by enfotec, 6th November 2019 01:15
    1 Attachment(s)
    • Replies: 4
    • Views: 476
    BradtheRad
    8th November 2019, 07:19 Go to last post

  9. Small Project archery aiming assist

    Started by dalep, 6th November 2019 17:59
    1 Attachment(s)
    • Replies: 3
    • Views: 319
    dalep
    7th November 2019, 22:08 Go to last post

  10. Automatic light control circuit (On-Off)

    Started by sareehy, 30th October 2019 18:48
    3 Attachment(s)
    • Replies: 11
    • Views: 771
    sareehy
    6th November 2019, 21:00 Go to last post

  11. [SOLVED] Protect FPGA Pin from negative voltage

    Started by clros, 1st November 2019 11:37
    3 Attachment(s)
    • Replies: 18
    • Views: 651
    KlausST
    5th November 2019, 08:50 Go to last post

  12. Relay substitution and other help with Solar powered plant watering machine

    Started by Tryptamine, 3rd November 2019 18:18
    1 Attachment(s)
    • Replies: 2
    • Views: 290
    KlausST
    4th November 2019, 01:59 Go to last post

  13. PCB Christmas tree Ornaments

    Started by hobbyProgrammer, 29th October 2019 16:40
    • Replies: 1
    • Views: 287
    ads-ee
    29th October 2019, 17:08 Go to last post

  14. PC based Oscilloscopes

    Started by electronicsman, 30th June 2019 12:31
    • Replies: 11
    • Views: 1,015
    Kiriakos-GR
    29th October 2019, 13:47 Go to last post

  15. 2nd order Butter LPF is required with ,modules of multiplier, adder, D flip flop

    Started by Delta14, 28th October 2019 06:45
    • Replies: 3
    • Views: 268
    FvM
    28th October 2019, 22:48 Go to last post

  16. [WILL IT WORK?] Custom ATMEGA2560

    Started by mdo131, 28th October 2019 18:17
    2 Attachment(s)
    • Replies: 1
    • Views: 182
    KlausST
    28th October 2019, 19:11 Go to last post

  17. L293d - Input Voltage (motor operation)

    Started by utsavp1417, 15th October 2019 23:15
    1 Attachment(s)
    • Replies: 3
    • Views: 1,065
    KlausST
    16th October 2019, 22:34 Go to last post

  18. Desperate for help (computer fan control) or this could cost huge $$$

    Started by 1stFalloutBoy, 13th October 2019 04:37
    • Replies: 7
    • Views: 716
    KlausST
    14th October 2019, 07:09 Go to last post

  19. Instrumentation AMP Virtual short.

    Started by mrblueblue1234, 9th October 2019 17:41
    2 Attachment(s)
    • Replies: 5
    • Views: 926
    asdf44
    10th October 2019, 00:46 Go to last post

  20. Impedance Calculation

    Started by mrblueblue1234, 9th October 2019 01:09
    3 Attachment(s)
    • Replies: 5
    • Views: 667
    KlausST
    9th October 2019, 22:48 Go to last post

  21. "Self-Healing" 12V 30A Circuit

    Started by Nabors, 2nd October 2019 00:37
    1 Attachment(s)
    • Replies: 6
    • Views: 1,200
    FvM
    3rd October 2019, 11:29 Go to last post

  22. SD card - pull-ups required?

    Started by gmorfeus, 1st October 2019 10:16
    • Replies: 6
    • Views: 588
    gmorfeus
    3rd October 2019, 09:29 Go to last post

  23. Current Measure using Current Transducer

    Started by adimon, 27th September 2019 19:11
    • Replies: 2
    • Views: 368
    Easy peasy
    28th September 2019, 01:55 Go to last post

  24. problem with pcb etching

    Started by ArakelTheDragon, 25th September 2019 06:53
    • Replies: 16
    • Views: 1,041
    c_mitra
    27th September 2019, 23:49 Go to last post

  25. li-ion voltage reducer to 3volt - help needed

    Started by Javid.zare.s, 15th September 2019 01:20
    1 Attachment(s)
    • Replies: 8
    • Views: 928
    Pjdd
    27th September 2019, 09:32 Go to last post

  26. Another question about Holtek HT12E/HT12D pair

    Started by Mapuia, 27th September 2019 08:57
    • Replies: 0
    • Views: 190
    Mapuia
    27th September 2019, 08:57 Go to last post

  27. Change colors of liquid crystal display

    Started by RevDNS, 9th September 2019 08:51
    4 Attachment(s)
    • Replies: 7
    • Views: 997
    betwixt
    23rd September 2019, 23:14 Go to last post

  28. Portable headphone amp w. batteries

    Started by mikaelmark, 21st September 2019 14:13
    3 Attachment(s)
    • Replies: 14
    • Views: 1,173
    lggrover
    23rd September 2019, 06:07 Go to last post

  29. Li-ion Battery charger need help

    Started by maxim10373, 16th September 2019 06:15
    1 Attachment(s)
    • Replies: 4
    • Views: 545
    Easy peasy
    16th September 2019, 08:48 Go to last post

  30. Operating four Tx-Rx pairs in close proximity

    Started by Mapuia, 12th September 2019 16:43
    • Replies: 7
    • Views: 666
    Mapuia
    12th September 2019, 20:58 Go to last post
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