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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: 10,569
    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: 20,401
    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: 23,770
    pranam77
    21st August 2009, 09:14 Go to last post

  1. Open collector output arduino with led with PLC inputs problem

    Started by Big_Joe2, 11th February 2019 23:52
    2 Attachment(s)
    • Replies: 5
    • Views: 276
    betwixt
    Yesterday, 09:49 Go to last post

  2. Circuit for NPP-301A 100PSI IC (Pressure sensor) combined with MAX1472 RF Transmitter

    Started by NairVI, 17th February 2019 16:30
    4 Attachment(s)
    • Replies: 3
    • Views: 201
    NairVI
    19th February 2019, 19:15 Go to last post

  3. Can anyone help with this Tesla coil?

    Started by Aidan5566, 18th February 2019 17:37
    2 Attachment(s)
    • Replies: 3
    • Views: 149
    betwixt
    18th February 2019, 23:04 Go to last post

  4. nRF24L01 and ESP8266 in Arduino UNO

    Started by anneshabaruah, 11th February 2019 12:49
    • Replies: 9
    • Views: 508
    andre_teprom
    12th February 2019, 13:32 Go to last post

  5. replacing speaker with aux cable??

    Started by Javid.zare.s, 5th February 2019 10:10
    5 Attachment(s)
    • Replies: 7
    • Views: 629
    Audioguru
    7th February 2019, 19:07 Go to last post

  6. IR photo transistor replacement, help needed

    Started by Javid.zare.s, 6th February 2019 12:04
    2 Attachment(s)
    • Replies: 3
    • Views: 422
    betwixt
    6th February 2019, 21:04 Go to last post

  7. How do you trigger a triac?

    Started by boylesg, 6th February 2019 02:33
    1 Attachment(s)
    • Replies: 3
    • Views: 218
    schmitt trigger
    6th February 2019, 17:00 Go to last post

  8. Proteus 8.8 Through-hole library problem

    Started by stoykus, 5th February 2019 12:35
    • Replies: 0
    • Views: 118
    stoykus
    5th February 2019, 12:35 Go to last post

  9. Help re-creating a replica movie prop

    Started by skarkowtsky, 9th October 2018 20:30
    10 Pages •
    1 2 3 ... 10
    43 Attachment(s)
    • Replies: 181
    • Views: 8,360
    betwixt
    27th January 2019, 15:40 Go to last post

  10. USB differential pair on 2 layer board

    Started by Jester, 16th January 2019 22:03
    1 Attachment(s)
    • Replies: 3
    • Views: 649
    KlausST
    17th January 2019, 00:32 Go to last post

  11. "IR based" relay driving problem

    Started by Javid.zare.s, 16th January 2019 06:49
    3 Attachment(s)
    • Replies: 6
    • Views: 373
    d123
    16th January 2019, 15:15 Go to last post

  12. Short circuit protection in PCB design

    Started by Veketti, 27th December 2018 10:46
    2 Attachment(s)
    • Replies: 11
    • Views: 1,060
    d123
    11th January 2019, 19:32 Go to last post

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

    Started by theUltimateSource, 17th December 2018 11:12
    • Replies: 0
    • Views: 283
    theUltimateSource
    17th December 2018, 12:20 Go to last post

  14. Attaching Aerial to Case

    Started by cosmarchy, 12th December 2018 22:19
    • Replies: 3
    • Views: 396
    volker@muehlhaus
    14th December 2018, 08:09 Go to last post

  15. Zener diode protection on MCU digital pins

    Started by boylesg, 4th December 2018 23:45
    • Replies: 7
    • Views: 614
    schmitt trigger
    5th December 2018, 16:06 Go to last post

  16. Swapping Tx+ Tx- wires in Ethernet communication

    Started by jimmykk, 4th December 2018 13:48
    • Replies: 4
    • Views: 443
    FvM
    4th December 2018, 23:09 Go to last post

  17. Wiring RGB LED FAN/strip

    Started by cyberctrl, 29th November 2018 10:33
    3 Attachment(s)
    • Replies: 3
    • Views: 470
    d123
    29th November 2018, 21:32 Go to last post

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

    Started by neazoi, 29th November 2018 12:32
    2 Attachment(s)
    • Replies: 3
    • Views: 347
    betwixt
    29th November 2018, 14:49 Go to last post

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

    Started by kangyunmei, 23rd November 2018 02:54
    • Replies: 1
    • Views: 473
    BradtheRad
    23rd November 2018, 04:23 Go to last post

  20. 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: 1,200
    Akanimo
    21st November 2018, 06:44 Go to last post

  21. Is this circuit a constant current source circuit?

    Started by kangyunmei, 20th November 2018 09:16
    1 Attachment(s)
    • Replies: 5
    • Views: 531
    CataM
    21st November 2018, 02:02 Go to last post

  22. role of 1N4007 and reverse current

    Started by kangyunmei, 20th November 2018 09:09
    1 Attachment(s)
    • Replies: 2
    • Views: 291
    nikhilmahasvar
    20th November 2018, 11:17 Go to last post

  23. schematic diagram on RS485 MAX13487 chip

    Started by kangyunmei, 20th November 2018 09:02
    • Replies: 1
    • Views: 246
    KlausST
    20th November 2018, 09:44 Go to last post

  24. 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: 821
    d123
    17th November 2018, 08:02 Go to last post

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

    Started by Dustbuster, 24th September 2018 09:48
    • Replies: 18
    • Views: 2,005
    Dustbuster
    15th November 2018, 09:56 Go to last post

  26. Laoding and Off-Loading Inquiry

    Started by Qasim1991, 14th November 2018 03:59
    1 Attachment(s)
    • Replies: 3
    • Views: 437
    Qasim1991
    15th November 2018, 05:35 Go to last post

  27. iR based circuit help needed

    Started by Javid.zare.s, 13th November 2018 13:38
    • Replies: 4
    • Views: 477
    Javid.zare.s
    13th November 2018, 22:28 Go to last post

  28. Very low frequency sine wave generation

    Started by doncarlosalbatros, 10th November 2018 22:17
    1 Attachment(s)
    • Replies: 8
    • Views: 831
    LvW
    13th November 2018, 11:34 Go to last post

  29. Help with understanding wiring requirements of a transducer

    Started by doncarlosalbatros, 13th November 2018 00:50
    2 Attachment(s)
    • Replies: 1
    • Views: 568
    FvM
    13th November 2018, 09:44 Go to last post

  30. Load Management System

    Started by Qasim1991, 12th November 2018 23:19
    3 Attachment(s)
    • Replies: 0
    • Views: 235
    Qasim1991
    12th November 2018, 23:19 Go to last post
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