Liftmaster 3800 electric eye bypass

[LLONG]

I have no children and wish to disable my electric eyes. The unit does still have an auto reversing mode anyway. So i know many folks have simply taped the sensors together although that is not working on my one year old unit. One fellow said it was a current sensing circuit and would require a resister in the circuit although i believe his comment was a guess. Anyone done this on a recent unit? TIA

 

[pattenp]

So what's the reason to bypass the sensors?

 

[LLONG]

I did search on this and came up dry, but googling this has gotten me back to old threads on this forum. Whether this should or should not be done gets folks fired up for no purposefull intent. I'm a retired mechanical designer/design engineer that has thought this out well and feel these eyes do little for safety and want them gone for convenience and simplicity. They are right down where they get kicked and get out of alignment. But mostly i simply want to be able to hit the button IN the garage and walk out the door like i've done for the last 40 years. I understand 90% of you will disagree and thats fine. I don't recommend to anyone to disable anything. Call me a thrill seeker or simply one who still believes in free will, but please don't preach to us 10% wasting thread space(not that PP was). I should have stated this first so not to start a moral discussion about the neighbors cat.

 

[pattenp]

I wasn't going to preach safety to you. I was just curious as to what the problem is that you are trying to solve by removing the sensors. I've got the 3800 and have heard about the resistor trick but have no reason to do it. My garage door eyes have given me no problems over many years. The eyes in my head... well that's a different story.

The neighbor's cat can easily be taken care of.

 

[specmiata]

One idea is to simply mount them up above head height? Unlikely to get knocked about and easy enough to put back down where they belong if you need to.

 

[AndyL]

C'mon you're an engineer... 2 wires - provides both power and signal... You should be able to figure this out...

There is a circuit that's posted on GJ, stolen from somewhere else... But I'll tell you now - it's wrong, and you'll be buying a logic board if you use it as is... I know one of my local GJ members found out the hard way - as I was the tech sent out to fix it - and I saw the breadboard still sitting on his bench (and confirmed it was built correctly).

Engineer or not, litigious society or not... it's not worth it...

 

[Cryptic1911]

The resistor trick only works on the cable tension sensors, and as far as I know, the only way to "get rid" of the eyes is to mount them up on the rail pointing at each other. Apparently there's a bit more smarts to it than it just creating an open or closed circuit. Our tension sensors are bypasses, and the eyes are facing each other up on the track.

much easier to not have to deal with them stupid things getting knocked around all the time