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  1. B

    Identify unknown ic

    No help there but it looks like K401 has been shot at also.
  2. B

    Unable to eliminate ground loop interference (car audio)

    I would have thought a filter would be a perfectly acceptable solution to noise.
  3. B

    Digital piano won't power ON

    Good to see you stuck with it. Good job. Now don't go annoying the neighbours......:p
  4. B

    Unable to eliminate ground loop interference (car audio)

    Cars are a noisy environment, many times difficult to isolate. Perhaps think about using one of these....... http://vi.raptor.ebaydesc.com/ws/eBayISAPI.dll?ViewItemDescV4&item=282440904980&category=73836&pm=1&ds=0&t=1520241995000&ver=0
  5. B

    Kitchen Aid Stand Mixer redesign

    I doubt any cheap unit replacement will have everyday use and long life in the same sentence.
  6. B

    Kitchen Aid Stand Mixer redesign

    Usually pick up a cheap Chinese drill at about 750w for around $40, speed control included.
  7. B

    Need a circuit for HK 19f 24v dc

    Google "using relays".
  8. B

    replacement charger

    Charging Lipo cells requires a charger designed for the job.
  9. B

    Kirchoff's law for volts

    Wiring colours in autos, very rarely, if ever, follow the McGyver colour code.
  10. B

    MOSFET Circuit Help

    Sounds like a supply problem however, without a lot more detail, not possible to say just what.
  11. B

    Loud Bell/Ringer for Mobile/Cell Phone

    Most mobiles have a buzzer/motor vibrator. One on my Iphone is difficult to ignore.
  12. B

    DIY Electric Shocking Mouse/Rat Trap

    Ratsak...??
  13. B

    555 pwm controller.

    Yes, but not a convict decendant, plumber calls me the Viking
  14. B

    Please help me... FM Bug transmitter

    Just when you think you've seen everything..........
  15. B

    555 pwm controller.

    Beats me why you don't simply replace the original crook chip.
  16. B

    Need help determining orientation of FET package in drawing

    You know I could have sworn I answered that in post #2
  17. B

    Need help determining orientation of FET package in drawing

    Was this a statement or a question? You have the data sheet. You have the drawings. You have the pcb. What more could you need?
  18. B

    Need help determining orientation of FET package in drawing

    Data sheet will show which pin is which. One would expect drain would be the top pins. Usual reason for common encasing is to match the device characterists more closely. Others will confirm positioning.
  19. B

    Hall effect controlled fuel injector

    Yes, I am very conversant with engines and technology. I build both here for many years. Certainly. Use a crank position sensor and a cam position sensor. Feed relevant data into a uC, fire the injector control at appropriate time and, depending on the nitro content, either hold on to your...
  20. B

    Digital piano won't power ON

    One way of getting a high voltage (when not connected) is having a bad connection somewhere, say a resistor gone high or a bad solder joint. Unloaded, you measure high, when current starts to flow it pulls the level low. Can't think why your metal film resistor would not work.
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