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  1. Tha fios agaibh

    Need help identifying this part

    looks like a rfid tag.
  2. Tha fios agaibh

    old garage door opener circuit board

    I'm with Alec that the cap leaked out. Only the bottom bracket bracket has paint. R3 probably got so hot it roasted c1? I suspect a shorted component across the power rail. Perhaps a diode?
  3. Tha fios agaibh

    old garage door opener circuit board

    I'm suspicious of that transistor or regulator thing right next to the transformer. It can be seen in second picture with coffee cup. What voltage is across capacitor c1? Checking the diodes is good place to start. Unsolder and lift one lead out of board before testing.
  4. Tha fios agaibh

    Just learning the ropes

    Panasonic, you got it. Always trust the decimal point. (And what side of the road your on)
  5. Tha fios agaibh

    Just learning the ropes

    Thanks Martin. I don't know if it's because of the flag, or because you drive on the wrong side of the road.
  6. Tha fios agaibh

    Just learning the ropes

    1.065k is the same as 1065 ohms. Or, 1 thousand and 65 ohms.
  7. Tha fios agaibh

    Just learning the ropes

    Yes
  8. Tha fios agaibh

    old garage door opener circuit board

    Agreed, Transformer sounds fine. If your lucky it's a fuse or relay contact. Full pictures of the pcb would be helpful. Does it do anything when you hit the button?
  9. Tha fios agaibh

    Watchdog Timers

    Another words, if the timer is executed with software, it's a software watchdog. Bob makes a good point, that (external) hardware should decern wither or not the software is functioning properly. But a (internal) software watchdog is also useful to verify that a program or portion of a program...
  10. Tha fios agaibh

    AC Compressor blowing fuse

    Thank you Alec. I was ignoring the obvious.
  11. Tha fios agaibh

    AC Compressor blowing fuse

    No problem. I'm sure one of our esteemed posters will chime in. I too share your zeal to help, but I'm limited by the resources between my ears.
  12. Tha fios agaibh

    AC Compressor blowing fuse

    Good info Martin. I have heard of the doubling rule of thumb. But I wonder if it's always adequate, given the fact that inductive spikes can reach about 10 times the voltage. Example; a 24v relay coil can release spikes of >300 volts. Wouldn't it prudent to use a PIV closer to 300v, rather than...
  13. Tha fios agaibh

    AC plug for DC purpose?

    Not relevant to your boat, but there's an electrical code that says to make mechanical connections (crimp) before any soldering. This is to prevent solder blowout like you experienced. Not bad advice in your situation. It's also important to use the right crimp tool for the job.
  14. Tha fios agaibh

    AC plug for DC purpose?

  15. Tha fios agaibh

    Hi from Romania!

    Hi Alex. Welcome
  16. Tha fios agaibh

    AC Compressor blowing fuse

    Some good suggestions, but I still think your getting spikes from the highly inductive load when it is switched off. Your plugging and unplugging the clutch does not simulate the actual (reactive) circuit. The best place to have a flyback diode to suppress the inductive spike is right at the...
  17. Tha fios agaibh

    Playing a car audio system at home.

    I built my own 12v ps in high school to power my 8 track tape player. At the time, I really didn't mind the 60 cycle hum along with the music.
  18. Tha fios agaibh

    Playing a car audio system at home.

    If you plan on using the radio portion, you'll want to observe the antenna impedance for best reception.
  19. Tha fios agaibh

    Hi from Northern Ireland

    Welcome Phil, this is a great place to learn and share knowledge. The membership is very friendly and patient. Even with my stupid questions. Regards, John
  20. Tha fios agaibh

    what AWG cable to use for cordless drill + car battery

    I believe it works, I just don't think this is something that will be working years from now. (Unless that is one whimpy gate) Personally, I would opt for a real ac motor powered from household. I pictured your gate being about 50 to 100ft from your garage where you would keep your battery. If...
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