Search results

  1. P

    Help in converting a wireless doorbell into a remote gate switch

    Old Steve, and/or anyone else that has knowledge and experience with the PT4303 and/or that"family" of chips. I know this is an old topic, maybe I should start a new thread, but while searching the internet for information on this chip, I found this discussion. Right now I've got a PCB that has...
  2. P

    Capacitor overcharge protection

    There are several ways to limit the voltage. Easiest would be a zener diode. Probably 5.1V. Also could use an LM7805 voltage regulator.
  3. P

    Boeing Lithium Battery Problem

    Probably the wrong root cause, but think outside the box for a second. I've been curious if altitude/pressure is contributing to the problem chemically. Anything else, say software or hardware, that should be reproducible on the ground in a lab. I've been thinking about it too, and I keep...
  4. P

    lighting my canopy

    Take a look at this: http://led.linear1.org/led.wiz and here. http://9circuits.com/blog/2011/09/19/electronics-101-basic-circuit-design/ LEDs are pretty straight forward. You can throw a 470 Ohm 1/2W resistor on a leg and attach....say a 9V battery to it and get a rough idea of how much...
  5. P

    lighting my canopy

    Most limit switches are going to have a NC and NO terminal (connection). So that means that with the switch just as it is, one point will be normally closed, and the other will be normally open. The only reason I mentioned a limit switch is because they are generally used in locations where...
  6. P

    lighting my canopy

    You just want to light up the inside of the unit when you open the rear door, and have a timer to turn it off after a certain amount of time. You could build all this yourself just to learn, but I would suggest buying the stuff "off shelf". For example, the switch you would be interested in...
  7. P

    Microwave question

    Fro what you've posted, the manual states the fan motor MAY stay on for some time after microwave use. It just doesn't say how long. You stated that it does stay on, but I don't recall how long you said it stays on before turning off. Obviously it is temperature related, and once the temp...
  8. P

    Bipolar Caps in audio equipment

    Hi, I have a question pertaining to Bipolar capacitors. Quick history: I recently was given a couple of nice quality speakers my a musician. One speaker no longer functioned. I took it apart and found that a capacitor in the cross over was damaged, typical capacitor swell. Nothing else seems...
Top