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  1. Martaine2005

    HOME THEATER AUDIO CUTS OFF

    Hi Dave, not really sure either. But assume CD, TAPE, AUX, PHONO for us old guys!!!!! So swittching between inputs has not shorted. Sound for a second before interrupts. O/P sounds fine. Just some interrupt protection before all outputs. May be?
  2. Martaine2005

    I require help repairing a Kitchenaid Water Kettle

    Wow, you are superb.. I wish everybody was like you. We need to stay on the AC side of the circuit board. I notice on the under-side is four black small components. These are called diodes and make up a bridge rectifier. This turns AC to DC and gives DC voltage to the other boards. Next...
  3. Martaine2005

    Night vision camera boards

    Oops, sorry. Misread your post. Harold is 100% correct. There are assembled camera and IR systems for fishing etc. Around £80. Martin
  4. Martaine2005

    I require help repairing a Kitchenaid Water Kettle

    Thank you. There really is not much to go wrong. However, checking may be a little more difficult and CARE must be taken at all times.. You seem to be very good at tracing what is connected to what!! That is very helpful. So well done. We need to know that voltage is present to the board that...
  5. Martaine2005

    Night vision camera boards

    Hi, The item you are looking for is 'infrared' leds. You can buy these on the Bay very cheap for cctv cameras and adapt them for being truly waterproof and submersible. They are usually 9-12volt DC and already in a housing. Select the type, shape, amount of leds etc and improvise. Possibly a...
  6. Martaine2005

    I require help repairing a Kitchenaid Water Kettle

    OK, sorry. On the board where the fuse is. There are two rectangular white boxes. They are relays... If you plug the base of the kettle in and turn the switch on, can you here either of those click? Better still, can you give a better pic of the relay? I don't think they are the problem though...
  7. Martaine2005

    HOME THEATER AUDIO CUTS OFF

    Hi Renwick, Have you checked the obvious first? Like speaker connections tight and in some cases polarity. Especially no loose wire strands shorting either terminals? Check and double check these. A loose strand can almost be hair strand size (wire dependant). Take your time and undo each...
  8. Martaine2005

    I require help repairing a Kitchenaid Water Kettle

    Yes, looks to be fine. There are two big white boxes. They are relays, can you here either click when you apply power and turn the kettle on? Martin
  9. Martaine2005

    I require help repairing a Kitchenaid Water Kettle

    I can't really say for sure by the picture. But you need to unplug it and check your purple again and the other side of the fuse. Not for voltage but for continuity. Martin
  10. Martaine2005

    Bass Amplifier troubleshooting

    Hey Joe, I shouldn't have said EARTH!! It isn't spiked to EARTH!! It's kind of frowned upon around here. I should have said 'Ground' or 'common' or 'neutral'. Anyway, yes check all the 'common connections' especially the input jack. There are large capacitors on the board too which can vibrate...
  11. Martaine2005

    Bass Amplifier troubleshooting

    Hi Joe, sounds like an EARTH issue initially. Is this amp new to you? Or used by you before with no problem? Reason I say this is because possible interference from flourescent lights etc can cause this kind of issue. Is it a similar buzz to when you plug a jack in and touch the terminals? I...
  12. Martaine2005

    Looking for 8051 PCB for projects

    This could be the thread 'steve' is talking about here Martin
  13. Martaine2005

    Flip-Flop Circuit Using BJT's, OP Amps, and Cap Timer

    Sounds like a simple multivibrator circuit would eliminate the 555.' EDIT: AK already mentioned a multivibrator. Martin
  14. Martaine2005

    Where to get a 4017 chip

    http://www.ebay.co.uk/sch/i.html?_nkw=cd4017&clk_rvr_id=860692384580&adpos=1o1&MT_ID=11&crlp=66222455575_2113181&device=c&geo_id=32251&keyword=cd4017&crdt=0
  15. Martaine2005

    How does an op-Amp make the inputs the same?

    This should clear a few things up. Here
  16. Martaine2005

    Electronic distance learning course and maintenance of radio and tv

    http://learn.org/articles/Free_Online_TV_Repair_Courses_Where_Can_I_Find_Them.html http://learn.org/articles/How_Do_I_Become_an_Electronics_Repair_Technician.html
  17. Martaine2005

    Electronic distance learning course and maintenance of radio and tv

    http://www.electronicstheory.com/ http://www.computerworlduk.com/news/it-vendors/mit-offers-free-online-electronics-course-3338095/
  18. Martaine2005

    Electronic distance learning course and maintenance of radio and tv

    http://study.com/articles/List_of_Free_Online_Computer_Repair_Courses_and_Classes.html http://study.com/articles/List_of_Free_Online_TV_Repair_Courses_and_Learning_Materials.html
  19. Martaine2005

    Electronic distance learning course and maintenance of radio and tv

    Are you paying?
  20. Martaine2005

    Electronic distance learning course and maintenance of radio and tv

    What course? Are you paying?
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