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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: Can anyone ID these chips?

    Started by lteschler, 22nd November 2016 15:08
    2 Attachment(s)
    • Replies: 1
    • Views: 10,351
    d123
    22nd November 2016, 22:02 Go to last post

  2. 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: 20,213
    Rattanee
    2nd August 2014, 19:26 Go to last post

  3. Sticky Thread Sticky: Read this before posting.

    Started by pranam77, 21st August 2009 09:14
    • Replies: 0
    • Views: 23,668
    pranam77
    21st August 2009, 09:14 Go to last post

  1. "IR based" relay driving problem

    Started by Javid.zare.s, Today 06:49
    3 Attachment(s)
    • Replies: 1
    • Views: 5
    KlausST
    Today, 07:33 Go to last post

  2. Short circuit protection in PCB design

    Started by Veketti, 27th December 2018 10:46
    2 Attachment(s)
    • Replies: 11
    • Views: 778
    d123
    11th January 2019, 19:32 Go to last post

  3. Help re-creating a replica movie prop

    Started by skarkowtsky, 9th October 2018 20:30
    9 Pages •
    1 2 3 ... 9
    43 Attachment(s)
    • Replies: 179
    • Views: 7,330
    d123
    6th January 2019, 17:16 Go to last post

  4. [SOLVED] How are these called? - protection tubes for a single pin header

    Started by theUltimateSource, 17th December 2018 11:12
    • Replies: 0
    • Views: 218
    theUltimateSource
    17th December 2018, 12:20 Go to last post

  5. Attaching Aerial to Case

    Started by cosmarchy, 12th December 2018 22:19
    • Replies: 3
    • Views: 307
    volker@muehlhaus
    14th December 2018, 08:09 Go to last post

  6. Zener diode protection on MCU digital pins

    Started by boylesg, 4th December 2018 23:45
    • Replies: 7
    • Views: 438
    schmitt trigger
    5th December 2018, 16:06 Go to last post

  7. Swapping Tx+ Tx- wires in Ethernet communication

    Started by jimmykk, 4th December 2018 13:48
    • Replies: 4
    • Views: 307
    FvM
    4th December 2018, 23:09 Go to last post

  8. Wiring RGB LED FAN/strip

    Started by cyberctrl, 29th November 2018 10:33
    3 Attachment(s)
    • Replies: 3
    • Views: 378
    d123
    29th November 2018, 21:32 Go to last post

  9. Should I care about lead-free solder impurities?

    Started by neazoi, 29th November 2018 12:32
    2 Attachment(s)
    • Replies: 3
    • Views: 261
    betwixt
    29th November 2018, 14:49 Go to last post

  10. [Moved] Do you know sth about Remote LED sensor

    Started by kangyunmei, 23rd November 2018 02:54
    • Replies: 1
    • Views: 400
    BradtheRad
    23rd November 2018, 04:23 Go to last post

  11. a chip which do the same as the mux/demux When they are put together

    Started by erfanbas, 19th November 2018 22:39
    2 Attachment(s)
    • Replies: 16
    • Views: 927
    Akanimo
    21st November 2018, 06:44 Go to last post

  12. Is this circuit a constant current source circuit?

    Started by kangyunmei, 20th November 2018 09:16
    1 Attachment(s)
    • Replies: 5
    • Views: 404
    CataM
    21st November 2018, 02:02 Go to last post

  13. role of 1N4007 and reverse current

    Started by kangyunmei, 20th November 2018 09:09
    1 Attachment(s)
    • Replies: 2
    • Views: 213
    nikhilmahasvar
    20th November 2018, 11:17 Go to last post

  14. schematic diagram on RS485 MAX13487 chip

    Started by kangyunmei, 20th November 2018 09:02
    • Replies: 1
    • Views: 172
    KlausST
    20th November 2018, 09:44 Go to last post

  15. How to indicate overflow of 4017 counters? How to stop counter?

    Started by truffaldino, 16th November 2018 03:38
    3 Attachment(s)
    • Replies: 7
    • Views: 632
    d123
    17th November 2018, 08:02 Go to last post

  16. Replacing an AC Ni-Cad battery charger with a DC battery charger

    Started by Dustbuster, 24th September 2018 09:48
    • Replies: 18
    • Views: 1,694
    Dustbuster
    15th November 2018, 09:56 Go to last post

  17. Laoding and Off-Loading Inquiry

    Started by Qasim1991, 14th November 2018 03:59
    1 Attachment(s)
    • Replies: 3
    • Views: 347
    Qasim1991
    15th November 2018, 05:35 Go to last post

  18. iR based circuit help needed

    Started by Javid.zare.s, 13th November 2018 13:38
    • Replies: 4
    • Views: 371
    Javid.zare.s
    13th November 2018, 22:28 Go to last post

  19. Very low frequency sine wave generation

    Started by doncarlosalbatros, 10th November 2018 22:17
    1 Attachment(s)
    • Replies: 8
    • Views: 650
    LvW
    13th November 2018, 11:34 Go to last post

  20. Help with understanding wiring requirements of a transducer

    Started by doncarlosalbatros, 13th November 2018 00:50
    2 Attachment(s)
    • Replies: 1
    • Views: 497
    FvM
    13th November 2018, 09:44 Go to last post

  21. Load Management System

    Started by Qasim1991, 12th November 2018 23:19
    3 Attachment(s)
    • Replies: 0
    • Views: 182
    Qasim1991
    12th November 2018, 23:19 Go to last post

  22. Digital tv signal amplifier schematic

    Started by boylesg, 11th November 2018 07:41
    • Replies: 1
    • Views: 267
    betwixt
    11th November 2018, 10:00 Go to last post

  23. 230V 40A relay contact material

    Started by hemnath, 2nd November 2018 11:16
    • Replies: 7
    • Views: 649
    hemnath
    10th November 2018, 11:41 Go to last post

  24. [SOLVED] Voltage Comparator Design

    Started by Qasim1991, 5th November 2018 00:41
    2 Attachment(s)
    • Replies: 17
    • Views: 1,224
    d123
    9th November 2018, 22:15 Go to last post

  25. UART transmission rate

    Started by joniengr, 8th November 2018 10:47
    • Replies: 2
    • Views: 301
    andre_teprom
    8th November 2018, 14:39 Go to last post

  26. Non Dimming Touch On / Off Control

    Started by cosmarchy, 1st November 2018 23:00
    • Replies: 5
    • Views: 499
    cosmarchy
    3rd November 2018, 21:13 Go to last post

  27. Two OpAmp connected in series

    Started by joniengr, 3rd November 2018 15:56
    • Replies: 4
    • Views: 368
    BradtheRad
    3rd November 2018, 19:35 Go to last post

  28. LM741 Bass/Treble & Volume Control

    Started by Thayne, 2nd November 2018 15:46
    4 Attachment(s)
    • Replies: 11
    • Views: 754
    Audioguru
    3rd November 2018, 17:18 Go to last post

  29. DIY for the first time - Struggling with a Bench PSU

    Started by gregoryt, 30th October 2018 12:40
    1 Attachment(s)
    • Replies: 0
    • Views: 315
    gregoryt
    30th October 2018, 12:40 Go to last post

  30. Control switching regulator output using an MCU

    Started by dansteinb, 26th October 2018 16:08
    • Replies: 1
    • Views: 397
    KlausST
    26th October 2018, 16:48 Go to last post
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