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  1. KJ6EAD

    Help w/ Looping a Rec Module

    I'd like to believe that but I want to hear it from him.
  2. KJ6EAD

    Help w/ Looping a Rec Module

    What happens if you just hold the start button down continuously. Does the message play repeatedly or just once? What happens if you push the start button during playback. Does it start again from the beginning or just continue playing?
  3. KJ6EAD

    Help w/ Looping a Rec Module

    If the 20 second period is fixed, not variable then you could just use an astable timer circuit to electronically "push" the button every 21 seconds. Usually the button is just sinking a logic line to ground. Both the timer and the playback module could be powered from the same supply so...
  4. KJ6EAD

    LED Project

    That's pretty thin. It would have to be smd LEDs on a flex circuit to fit. These are about 50% too thick and the LED spacing isn't dense enough but in the ball park. Give these guys a call. They may have a supplier that can work out what you need...
  5. KJ6EAD

    US to AUS power adaptor?

    Isn't Jaycar kind of the Australian version of Radio Shack? They should be able to help you out. Take in the old adapter and if possible the device it's intended to power. http://www.jaycar.com.au/productResults.asp?MID=3&SSUBID=824&SUBCATID=1000&keyform=CAT2#3
  6. KJ6EAD

    Pinball Flipper Logic

    Your understanding of the function of the flippers and switches is correct. Leaf switches in pinball games have to be adjusted correctly so there's a potential problem area. On your schematic there's a "UPF interboard" that could also be a problem. The simplest explanation of the problem would...
  7. KJ6EAD

    Electrolytic capacitors in old car radio

    Car radios are designed for punishing environmental conditions and that one was built by a reputable manufacturer so I would expect them to be fine. The interior of a car can go from well below freezing to over 140°F and the radio will usually survive that year after year so 17 years of...
  8. KJ6EAD

    What 220V AC plug is this?

    There is a hand crimper available for approximately $35 that works quite well for these open barrel contacts. It's best to practice on scrap wire and terminals to determine the correct size tool well for the conductor and insulation before committing to the cordset...
  9. KJ6EAD

    Sony DVP-NS700P DVD Player Turns On Then Turns Off

    Once you've generalized the location of a flaky connection on the board, you can often locate it more precisely by probing with a small plastic rod. Another possible cause for your control system timeout is a read failure caused by a weak laser. The power output of diode lasers drops with age...
  10. KJ6EAD

    What 220V AC plug is this?

    It looks like something from the Molex Mini-Fit Jr. series or Amp Mate-N-Lok series connectors. The back edge of the connector in your unit will have some markings.
  11. KJ6EAD

    How to test capacitors without desoldering/Synth repair

    It's probably flux residue. All of your photos are out of focus so it's hard to tell. ;) Did you shine a light into the jacks to make sure there's no debris inside?
  12. KJ6EAD

    How to test capacitors without desoldering/Synth repair

    IC1–IC3 are on the extreme edge of the power PCB clamped to the chassis for heat sinking. IC38 on the main PCB is a bidirectional switch on the channels that feed outputs 3 and 4 on the jack PCB. There's a good chance that IC38 and/or some of the amplifiers (IC45–IC49–Q4, IC46–IC50–Q5) on one...
  13. KJ6EAD

    Pinball Flipper Logic

    Have you gone through the solenoid and switch tests for the relevant solenoids and switches? Have you checked the adjustment of the end of stroke (EOS) switches?
  14. KJ6EAD

    Help needed in monitor solution

    Pi or T attenuators are made up of three components (usually resistors) on the circuit board feeding the antenna or the antenna base loading inductor. The components can be bypassed or changed. This is really a task for someone with some radio electronic knowledge and experience.
  15. KJ6EAD

    Complete N00b needs some advice

    No, I'm just used to pedantically color coding everything.
  16. KJ6EAD

    Complete N00b needs some advice

    For just two wires of that type and size you could do it with a pair of scissors and a sharp knife or you could buy a cutter/stripper starting around $3. Find a friend with a multimeter to determine polarity for you so you get the red and black correct.
  17. KJ6EAD

    laptop charger testing

    That's what I was afraid of. You've got your probes attached to the power supply in parallel so the current will always read as an overload on the meter. Current measurement must be done with the probes connected to the circuit under test in series. See page 8 in the manual...
  18. KJ6EAD

    laptop charger testing

    :confused: I'm having trouble understanding your meaning since you don't form sentences with correct capitalization and punctuation.
  19. KJ6EAD

    Complete N00b needs some advice

    It's not hard to replace the connector on one of those power supplies but I prefer to leave the original molded connector and make an adapter pigtail. Are you perhaps a non-soldering person? If so, I'd suggest you get this stuff, cut the extension cable in half and put the alligator clips on the...
  20. KJ6EAD

    laptop charger testing

    That sounds like you're overloading the meter. Do you have it connected in series with the load with the leads connected to the correct terminals on the meter?
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