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  1. Alec_t

    Working of a JK Flip-Flop. Help needed with the circuit.

    Perfectly possible.
  2. Alec_t

    555 timer to turn on 2nd 555 timer

    You start with 1mS (or less) wide pulses, then change (directly or incrementally) to 2mS (or greater) wide pulses. The interval between pulses stays ~ the same (somewhere in the 20mS to 50mS range, not critical). 'Left' and 'right' may differ from one servo maker to another.
  3. Alec_t

    555 timer to turn on 2nd 555 timer

    Well you could try inreasing R6 further and reducing R8 further, but Ltspice is telling me your pulse width is already changing from more than 2mS to less than 1mS, i.e is exceeding the standard servo pulse width range. So perhaps the less-than-expected angular movement is due to the fact that...
  4. Alec_t

    555 timer to turn on 2nd 555 timer

    Try this: Increase R6 to 22k, and/or reduce R8 to 10k.
  5. Alec_t

    MOSFET Temperature measurements

    Yes, you can chart MOSFET temperature and time. You also need to monitor the motor somehow to ascertain if it is running or not.
  6. Alec_t

    Solar panel no amperage

    What still works? Is your meter functioning correctly as an Ammeter or is its fuse blown? We still don't know what your meter setting and test setup was when you tried measuring current. If the panel is producing a voltage then it must be able to drive a current through a resistive load. If you...
  7. Alec_t

    Solar panel no amperage

    Well that's about what it should be. 12V x 0.125A = 1.5W.
  8. Alec_t

    Solar panel no amperage

    With no diode and no resistor you may have blown the fuse inside your meter. Edit: Did you have the meter probes plugged into the correct sockets of the meter for the 10A current range?
  9. Alec_t

    Solar panel no amperage

    What value load resistor did you use when measuring current? Did you have your meter set to a current range? Post a sketch of your test setup.
  10. Alec_t

    Working of a JK Flip-Flop. Help needed with the circuit.

    Then perhaps this circuit is what you want?
  11. Alec_t

    Working of a JK Flip-Flop. Help needed with the circuit.

    How about this?
  12. Alec_t

    100MHz Schmitt Oscillator

    I doubt it. Have you allowed for capacitor charge time and the pulse edge rise and fall times?
  13. Alec_t

    How do I run a dc motor slowly?

    Even that arrangement would need modest gearing because, as Roman found, "The motor would not run any slower than approx 70 RPM. "
  14. Alec_t

    How do I run a dc motor slowly?

    8rpm is a challenge. Unless you have gearing with a large reduction ratio, I don't see how PWM will do what you want with a standard DC motor.
  15. Alec_t

    need schematic for 110v to 220v built in wall wart

    Eh?
  16. Alec_t

    Black & Decker Kr603 600w Type 2 Drill

    Could be a loose connection? Welcome to EP!
  17. Alec_t

    741 op-amp

    It will struggle to produce much of an output at 20kHz without significant distortion.
  18. Alec_t

    Stupidly Simple Question

    The mains plug needed is a standard 'figure-8' one, like this. The DC plug may be proprietary.
  19. Alec_t

    Consultation

    Welcome to EP! Sounds like a voltage spike could be causing Q2 collector-base breakdown, which would pass a current pulse through the 555. Is Q2 on a heatsink? What peak current does Q2 draw?
  20. Alec_t

    Hi y'all from NW ARKANSAS

    Welcome to EP, Bill!
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