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  1. KTW

    Testing/troubleshooting my RF transmitter and receiver pair

    If the battery is good I would be using my GY560 frequency counter to test the transmitter.
  2. KTW

    Beginning electronics, understanding whats actually happening

    Build something simple you have an interest in. Find a schematic on line or ask for help building the one you want. Post your questions and someone will usually respond.
  3. KTW

    Deaf Alarm Clock Rubber Button Issues

    That's what it's designed to do, stick to rubber. There are different brands, do a search on it. You can do a continuity test with a meter to check the back of the rubber buttons. They may have used a conductive grease.
  4. KTW

    Deaf Alarm Clock Rubber Button Issues

    You might have to replace the carbon. https://www.amazon.com/Keypad-Restore-Conductivity-Carbon-Copper/dp/B0026PRMVM
  5. KTW

    Vibrating Butterflies how make them flutter?

    Check this out,
  6. KTW

    Canon Copier PC720 Clangy Noise

    Sounds like a mechanical failure, unplug it and give it a good cleaning but at 19 years of age I'd say you were due a new machine.
  7. KTW

    Auto switching polarity reversing switch

    Have a look at this... http://www.bpesolutions.com/bpemanuals/LinearSlideInfo.pdf
  8. KTW

    Auto switching polarity reversing switch

    Are you looking for a manual switch? https://www.firgelliauto.com/products/rocker-switches-for-linear-actuators-momentary-and-sustaining
  9. KTW

    LED Christmas lights gone dim

    Are they a different wattage?
  10. KTW

    Need help !! LDR night light

    I built a night light using an LDR enabled PIR sensor so it only operates when activated. It has to be quite dark to work.
  11. KTW

    Cant get a voltage reading off an working AC/AC Adaptor with a multi meter ?

    You are testing for 12 volts AC so set your meter to the next number above 12 on the AC voltage scale. It could be 40 or what ever is greater than 12 on your specific meter.
  12. KTW

    Cant get a voltage reading off an working AC/AC Adaptor with a multi meter ?

    Take the black lead from your meter and place it on something that is known to be grounded like an electrical box or cold water pipe then probe the inside and outside of the barrel plug with the red lead.
  13. KTW

    Cant get a voltage reading off an working AC/AC Adaptor with a multi meter ?

    Have you tried testing with the negative meter lead to a known ground?
  14. KTW

    Christmas Light Problem

    Check this out ... https://www.electronicspoint.com/threads/mini-christmas-lights.276762/#post-1676042
  15. KTW

    sunbeam electric blanket no heat

    Just letting you know it could be something else that's causing the problem, something within the blanket that you can't see.
  16. KTW

    sunbeam electric blanket no heat

    I just read it on multiple reviews, same unit. http://www.complaintsboard.com/complaints/sunbeam-westerly-rhode-island-c134216.html
  17. KTW

    sunbeam electric blanket no heat

    This is what I read ... We bought 2 throws and a blanket, all of which have drastically dropped off in temperature. I called Walmart and they won't take them back after 1 month. being the electronics technologist that I am, I cut open the blanket to see what could have failed. There is a...
  18. KTW

    sunbeam electric blanket no heat

    From what I've read this is common with these Sunbeam blankets. There might be a microcontroller in the blanket causing the problem.
  19. KTW

    Getting USB power from car's fuse box

    You can test all the 10 amp fuses in the picture with a 12 volt test light to see if there is 12 volts across both sides of the fuse when the key is off. If you find one then you can use a piggy back to replace that fuse,reinstall the 10 amp fuse in the piggy back and add a 2 amp fuse to your...
  20. KTW

    Getting USB power from car's fuse box

    If that's the 50 amp fuse it's way too much for what you are adding to it. This requires a 10 gauge wire, too heavy for what you need.
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