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  1. 73's de Edd

    Beginner circuit problem

    Initially use a DC voltmeter , to read the voltage between the number 1 ground and pin 3 of the 555 to thereby see if you are getting a timely on off switching of that voltage . If so , then use a proper value of dropping resistor in series with your LED. The series wiring sequence is pin 3...
  2. 73's de Edd

    LG RX8 S-PROTECTION PROBLEM

    Sir vincent mutale . . . . . Here is the extreme left copy of one power output stage, all of the other ones are over to the right, being duplicated, just as this one is There is the Class D processor and driver as the YELLOW rectangle IC. There are two FET POWER AMPS as the YELLOW CIRCLES...
  3. 73's de Edd

    Help me understand this combination lock circuit (4017)

    Sir Appy1 . . . . . It's a MIRACLE ! Back at your initial query time . . . I had prepped an explanatory illustration for your question. Thereby, being ready to post it the next morn . . . . then . . . I coundn't find that PNG anywhere . . .was it trashed ? Just now FOUND it, stored in...
  4. 73's de Edd

    Hartung amplifier project

    Sir Ian Mason . . . . . Looking at the NEW photo #2, where the terminals can now be seen . It looks like the BLACK taped connections would be like . . .either start or finish sets of the two windings. That would mean that you need to take out the twists and end up with straight wires again...
  5. 73's de Edd

    LED Dimmer suited for task?

    Sir bushtech . . . . . You say . . . Left and centre pin (as per above photo): 0Ω Right and centre pin: 0.8MΩ from off click right through to max Whereas, you are able to get much lower ohmmage at the other Left limit . . .akin to . . . . Making one wonder if your pot has an end of limit...
  6. 73's de Edd

    Hartung amplifier project

    Sir Ian Mason . . . . . I had to go get an extra photo of your "Chicken Kit " so that I could then fully see ALL of its feathers . . . . .a la . . . . https://i.ebayimg.com/images/g/LdwAAOSwCJxaEyJX/s-l1600.jpg O.K. initially . . . . you have 4 white wires as the primary of that units...
  7. 73's de Edd

    LED Dimmer suited for task?

    The 0.1 ufd seems about right for being one element of a timing network + its companion resistor(s). Plus I do see at least one resistor and the BLUE diode is probably the Diac. BT137 . . . . . https://alltransistors.com/pdfview-s.php?doc=bt137f&dire=05 APPLICATION . . . . ...
  8. 73's de Edd

    General capacitor question.

    Digi Key or Mouser Electronics. AND you can also use the wire leaded versions of that radial type of electrolytic capacitor ( s ).
  9. 73's de Edd

    I dont know what is this component in my circuit

    Sir natdawg . . . . Take the " teacher. . .teecher ?" this copy and make him take note of his shorted out lamps and ask why he wants to trip the labs breaker and blow out all of your TRIACS + ? Lack of help on a situation / error of this magnitude is absolute and sheer IGNORANCE on his part...
  10. 73's de Edd

    AIWA-AV97HR volume control not working

    Sir Sunnysat Confirmation: Is the proper and full ID being . . . .AIWA AV-D97 and this being your unit ? If so . . . that is being a digital potentiometer on the front and NOT like your fathers old analog volume pot. It feeds in to two Bitsumishi M6249 audio processors for controlling...
  11. 73's de Edd

    FYI . . . . .circa 1948

  12. 73's de Edd

    Current sensing circuit help

    With R4 at 14.4 MILLION ohms of constriction of your primary input power loop. Believing that and not seeing the error, one should also believe in a gnat on a hamster wheel , as being the power source of a Corvette dragster.
  13. 73's de Edd

    MCS 3847 Integrated Amp Noisy Left Channel

    Gentlemen . . . . . On my # 45 almost to the end . . . .correctly amend . . . .. " with that mere lifting of the C201 electrolytic coupling capacitor." Change C201 to being C203 electrolytic . Ref au #34 Sir Dorke sez . . . . . In order to verify which board is the source of the noise, I...
  14. 73's de Edd

    Automata clock. Running a motor for 30 second each hour.

    Sir bunchofapes . . . . . Could you designate where within that sites massive amount of info , WHERE your particular application was ? I was also pulling for the simple and cheap plug in with its pop in -or out setting tabs, but wasn't sure if it could be set for 24 settings per day or...
  15. 73's de Edd

    MCS 3847 Integrated Amp Noisy Left Channel

    Sir KilgoreCemetery . . . . . A good read . . . . . In my delving into and absolutely peeking into the minds of the N.E.C. design team at about the time frame of your units concept. There were three shifts in different phases of developments. There is your unit which is using discrete...
  16. 73's de Edd

    Thyristor question

    If the thyristor was successfully able to dump its charge into the coil, it has done, and held up under its most critical job. With the capacitor then discharged, there is then being no steady DC power across the thyristor to hold it latched on .
  17. 73's de Edd

    Makita polisher not working

    Sir VTI_16V . . . (Beta version) Since that cord probably does get a kajillion flexes, place an Ohmmeter in its lowest range, then touch probes to confirm what a short reading produces on the display . . . and its alternate display . . . when the probes are apart.. Take some bare copper wire...
  18. 73's de Edd

    Dryer motor wiring have diagram

    Sir John Roberts . . . When you just done what you did, you bypassed the switch inside the timer from its B to C terminals that normally activates the machine, with the timer knob, but you also bypassed the protective thermal limiter. Here is the present wiring flow . . . You have HOT AC...
  19. 73's de Edd

    Sony vcr /dvd player

    Mme Betty S . . . . Wht not try and see if this "Blast from the Past" resetting might just relate to your Sony also . . . . Partie 6 du . . . https://www.electronicspoint.com/threads/auto-blinking-light-on-jvc-vcr.64885/ 73's de Edd
  20. 73's de Edd

    Dryer motor wiring have diagram

    Sir John Roberts . . . If this is an otherwise fully functioning unit, why not start with looking at that shown cluster of wires at the motor and then pulling the YELLOW wire that feeds 220 down to the heater element, and tape up its connector and lash and set safely aside. That seems like...
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