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  1. GPG

    Your advice please - Powered speaker blow just resting no music playing ...

    I think its likely a power transistor failure putting DC on the speaker. Replace fuse and turn on with no speaker and measure the voltage across the speaker leads, Sorry not much of a manual. Its Class G amp,
  2. GPG

    Tilt Angle between two LDR

    If you mean a picture,no. If you mean a circuit, that's your job
  3. GPG

    Faint display on Aiwa Tuner

    As far as I can make out (without printing and taping) there are two sources for the filament supply for different units. One is from the Mains transformer and the other from a converter. This is one of the reasons I used to advise against these type of systems, they are not truly separates. The...
  4. GPG

    Tilt Angle between two LDR

    Bipolar supply, connect ldrs in series junction to amp+ set gain using - input. Angle the ldrs to left and right
  5. GPG

    Video Switcher

    Some info on composite https://en.wikipedia.org/wiki/PAL OP: what inputs do your monitors have? Do they correspond with the source signal(s)
  6. GPG

    Tilt Angle between two LDR

    Any power supply restrictions?
  7. GPG

    Your advice please - Powered speaker blow just resting no music playing ...

    Manual. http://www.manualslib.com/manual/772662/Mackie-Srm450.html Its likely the amp has failed and taken out the driver
  8. GPG

    Delayed buzzer for Motorbike

    Have made controllers for various highway marker/tar sprayer vehicles and always buffered all inputs and outputs with transistors. No failures. On the reverse, gear I made to transmit river level info installed in an area that got lightning occasionally would destroy chips regularly in spite of...
  9. GPG

    7-segment display 3-to-8 decoder logic circuit (please help, thank you)

    I think they have.
  10. GPG

    Modifying door bell with switch?

    Link?
  11. GPG

    Modifying door bell with switch?

    Put a led on the board where it says and see if it lights. If it does. swap it for a isolator and use the isolator transistor to trigger
  12. GPG

    B&t Tracer unit, xenon flash not working.

    Got a schematic of your interruptor/trigger circuit? This determines the current available to trigger the SCR. The original SCR is ~50μA
  13. GPG

    B&t Tracer unit, xenon flash not working.

    Links to data?
  14. GPG

    Ground loop filter

    http://www.vishay.com/docs/83622/il300.pdf Google IL300 for more
  15. GPG

    B&t Tracer unit, xenon flash not working.

    http://www.littelfuse.com/~/media/electronics/datasheets/switching_thyristors/littelfuse_thyristor_sxx8xsx_datasheet.pdf.pdf The tab will help with dissipation should you need to trigger often
  16. GPG

    B&t Tracer unit, xenon flash not working.

    https://www.onsemi.com/pub/Collateral/MCR100-D.PDF Seems OK Different package though
  17. GPG

    B&t Tracer unit, xenon flash not working.

    And discharge the flash cap:)
  18. GPG

    B&t Tracer unit, xenon flash not working.

    So finding a sensitive gate SCR replacement is your mission should you choose to accept it.
  19. GPG

    Before I start testing....

    They are bipolar electrolytics (BP label) and I would guess a part of a crossover with the toroidal inductor
  20. GPG

    B&t Tracer unit, xenon flash not working.

    Can you disconnect the SCR? Board leakage is a lesser possibility (just to confirm) but you may have a leaky SCR. Edit: check the value of the cap if your meter is able
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