AVR-Chat

Hi  MoreOrLess 

  its better to use an AND gate to check such things with a LED output....

  Some switches are designed to be make before break, and moving the switch fast may not allow the fuse enough time to heat up and burn through......but if the AND gate gets a high from both legs of the switch, it will flash the LED, especially easily seen if a cap is placed to store some energy each time the AND gate switches....

  I have not discussed the circuit at great length, a resistor will also be needed to reduce current to the LED.....but from my head all you need is a 5 volts supply, a single two input AND gate, a small cap, a resistor and a LED......and a plug board to mount things on!!

  regards

  Andy
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  I have taken switches like that apart and all have had an arm with contacts on both sides goes back and forth, to and fro, with the movement of the bat handle. Not being able to be two places at the same time... You get the picture.

  That said, if you took a low current fuse, say 1/10 or 1/100 amp job and connected a battery post through the fuse and to one of the outside terminals of the switch, then the other outside terminal of the switch back to the other post of the battery.

  Now flipped the switch back and forth, how many times, pick a number, 1, 10 or 100, the fuse will still be good. Two possibilities. One, its break before make. Two, the switch never makes long enough to blow the fuse but that I think is unlikely. The make before break would never be long enough to do any good, so what would be the use.

  Good luck and don't burn the house down,
  Mike


  



Greetings from

Andy Mathison

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