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  1. dorke

    Newb looking for help: Connecting phone to old speakers [pictures included]

    LaserDisc indeed . What a hype and flop those were. A hint to the age of that system...;)
  2. dorke

    Newb looking for help: Connecting phone to old speakers [pictures included]

    O.k. Any one of the "in"s would do: LD,VCR,DAT just pick one.
  3. dorke

    Newb looking for help: Connecting phone to old speakers [pictures included]

    NO ,you should use an INPUT ("speakers ports" are outputs). Look for AUX input (and not phono if there is one) somewhere.
  4. dorke

    Newb looking for help: Connecting phone to old speakers [pictures included]

    That one is rather expansive. they sell for 1$ or so on ebay Not the best quality, but they do the job.
  5. dorke

    GL850G equivalent

    May be that one could be of help.
  6. dorke

    transistor pairing? or not?

    What made you think you can use anything but a matched pair? To any Hi-Fi audio (class AB complimantry) power amp the Output Stage matched pair is a fundamental MUST requirement !!! That is critical for "ultra high-end " LM4702 type circuit performance . Here is a TI app note(your circuit is...
  7. dorke

    transistor pairing? or not?

    Bob, Not so ,the feedback can't take care of the transistors mismatch! and yes there are paired power Mosfets see here
  8. dorke

    oscillator help

    Here is another example of your miss-information and actually very basic misunderstanding !o_O And you brag about teaching teachers...:eek: Current(of electrons) does infect flow from negative to positive. it is only by convention that we prefer to describe it flowing the other way around from...
  9. dorke

    oscillator help

    Collin, A lot of brag and a lot of miss-information coming from you, and not for the first time ...:mad: In short, to create an oscillator we have to satisfy the barkhausen criteria. It can be done in numerous ways. For the sake of learning something: Here is another (this time C.E) Colpittz...
  10. dorke

    transistor pairing? or not?

    Definitely use paired Mosfets! Unless you totally don't care about distortion :rolleyes:
  11. dorke

    Help finding function generator schematics

    Not much hope without the manufectur name(and that is strangeo_O). Have you looked on the PCBs,transformer etc. for a clue? What is problem with it?some can be solved withot schematics(PS related etc.)
  12. dorke

    Shock Sensors

    Long,Long ago when I was 13, my intrest in Electronics was started in a hobbiest club by... building a very crud wood hendle 80W soldering iron...I still remember how proud I was of that :). Good on you, from your posts, I could have never think you are only 15;)
  13. dorke

    Shock Sensors

    Welcome to our world. I think that this projcet is not at all for beginners. First,you may try activating a LED with a light sensor. Then do that with a transistor. And then go a bit more "advanced"
  14. dorke

    Thermostat

    As I said before,you should not try any changes to this unit!!! I say this for your own good,it is not a childs play. What you are offered here is dangerous for you. Modifieng a mains related safty item should only be done by qualified personal. By your own words you don't even come close to...
  15. dorke

    Questions about UART communication

    not to me. The antenas should be in the same polarization(ie. vertical) From the data sheet: Tx power 10dbm Rx sensitvity -105dbm The channel has to incure 120db loss, shouldn't happen in 5 metres distance. Do you have it in open area or seperating walls?
  16. dorke

    Negative static field detector

    Here is another option for you:
  17. dorke

    Questions about UART communication

    Sounds like a problematic device. Maybe yours only but who knows? It is possible to test the transmitter power level and the receiver sensitivity, but I think you don't have the equipment to do that. You can also try changing the "T/R" channel, sometimes it helps in cases when the cahnnel is...
  18. dorke

    Magnavox - no power

    o.k you have a T (time delay) 2.5A 250V fuse. Get the one with the same parmeters and same dimentions. see here: Little fuse markings
  19. dorke

    Digital Multimeter Problem "-1" !!!

    You probably mean DT-9205 (not 50). These are low end cheap chineese DMMs selling for under 10$. What do you mean by " I worked for 2 weeks to buy this Multimeter" ??? Sorry to say but most likely your DMM is a gonner...:( One Needs to think before one does somthing ...
  20. dorke

    Magnavox - no power

    What is written on the Fuse (all of it)?
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