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Bypass garage door safety sensor.wmv

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Uploaded by on Jul 24, 2011

How garage door safety sensor works.

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Education

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Standard YouTube License

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  • Nicely done video.....helps explain in a very straight forward manner.

  • Gracias

  • It still works, just type it manually.

  • @MotesTV Is there any way that you could send me a diagram. It seems that you ISP changed your IP because I can't bring that bmp up and I trying to help out a co-worker with his eye. Thanks

  • Thanks for the o-scope readings MrEnergyFree, I leant my o-scope to a friend in another town and it will probably be a couple weeks before I see him again and retrieve it. My garage doors sensor stopped working, and I was able to use this information to create a bypassing circuit.

    For others, the circuit diagram can be found seen at 206.255.233.35/garagedoorsafet­yeyeshack.bmp, until my ISP changes my IP.

  • The o-scope around 8:15 shows the inverse of the signal that is really being transmitted. The ground is hooked to 2 and the probe to 3. So every .5ms out of 6.5 ms the connection between 2 and 3 is closed, effectively grounding 3. When the beams are open there is no connection between 2 and 3, and the o-scope shows the full potential between them.

  • thankyou for your time to show me how this works. I would have liked to see how this could be bypassed if I wanted to, but at least I know what is going on with my garage door.-----Jim P. Matthews

  • Very good video. That's a very high duty cycle on that pulse. About 95% duty cycle.

    What's strange is how the supply voltage and signals are super imposed upon each other. May a 555 timer PWM or astable circuit can be used. The is some one on You Tube that has successful bypassed the safety sensors already.

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