Garage Door Safety Sensors / How do they work? / Build your own system

This video will describe how the garage door IR beam trip sensors work. A simple interface board using a monostable circuit can be used to build your own stand alone system.

[@noweare1]

I really like that your videos pull me back to the hardware. I am such a microcontroller guy now that I would probably set up a timer to overflow at 8 milliseconds. The timer resets when the pin goes low and not overflow. If an overflow occurs I know the detector isn't seeing the transmitter.

[@ImnotChuck.]

I have a non-functioning system and this will provide the information I needed to troubleshoot it. Thanks.

[@0033mer]

You're welcome! Hope this helps.

[@johncatsoulis]

Very interesting Ken.

[@0033mer]

Hey John .... thanks for the visit!

[@Perspectologist]

Thank you for the explanation.

[@0033mer]

You are welcome!

[@romancharak3675]

Those look like fun components to build interesting projects with.

[@TOMTOM-nh3nl]

Thank You

[@0033mer]

You're welcome

[@JFoxTN]

Very good information and explained well. Thank you. Do you know if the Genie sensors work in the same way? 6.5 ms pulses. I don't have a scope so can't check it.

[@0033mer]

Never owned a Genie door opener but the sensors also have two wires for hook up, so so they probably operate the same way.

[@RandomNullpointer]

Can I request a circuit, please? I have a device that runs automatically intermittently in the basement. I need a wireless transmitter and receiver to see when it's in operation, from, like, 10 meters away. When the device runs it lights a green LED. I can tap to the LED's power or its light, but nothing else. Any ideas for a simple design, please? Perhaps a simple AM or FM signal circuit?

[@PhG1961]

Excellent!! No link to the Amazon devices?

[@PhG1961]

No worries, I found them... ;-)

[@0033mer]

Good .. It was too big: www.amazon.ca/Universal-Replacement-Compatible-Liftmaster-Chamberlain/dp/B0BRKTD7BV/ref=sr_1_1_sspa?crid=37N4SW37Z8V6W&keywords=garage%2Bdoor%2Bsensors&qid=1699727341&sprefix=garage%2Bdoor%2Bsensors%2Caps%2C168&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1

[@aaro_n]

I wanna use these as a parking sensor in the garage I thought about moving mine but that wouldn't be safe for small animals.