Yes but how to do thisOK, the systems that I have used were to keep machines from running when hands or fingers were near moving parts. The TS has given no clue as to what this is for, or how important reliability and performance would be.
For home fabrication and applications I suggest small cheap lasers and phototransistors as detectors. Narrow beam LEDs are not available to most folks, and the logic to make the wider beam ones work gets large. With LEDs the beams need to come on in sequence and the opposite detector needs to be checked only at that time. And they do it a few times per second. Lasers could all flash at the same time, a few times per second, and all of the sensors could be checked at once. Much simpler.
Aiming to detect any object passing through beam as low as 1 cm from ground to 2.75 feetWhat kind of resolution are you aiming for? In other words, what is the size of the smallest device you want to detect. That will define what you will need.
Regards,
Keith
Can be horizontal, but I need full details including components and circuitSome ramblings:
Keep beam width narrower than spaces , may need short focus lens on Tx., conical concentrator on Rx. Non modulated is simpler.
Can the beams be horizontal, less apt to collect trash?
What is your electronic knowledge level and experience? I doubt whether anyone on the forum is prepared to invest their precious time in designing and developing a complete custom system for you, especially when you can by a ready built and tested unit. If you insist on building your own, I would suggest you start doing some research on the subject so that you can design it yourself.Can be horizontal, but I need full details including components and circuit
It's funny how often this type of request comes up here. That's not how it works, buddy!but I need full details including components and circuit
A good light curtain is not simple, no matter what. How far apart can the light beams be? That is what the question about resolution means. Will you be able to produce the mounting arrangement to accurately point each light source at the detector it is going to work with? Is the purpose of this system to provide safety by stopping a machine when it is triggered, or is it for security, to send an alarm when something breaks a beam? The application matters a whole lot. We need to understand a lot more about this potential application.What is your electronic knowledge level and experience? I doubt whether anyone on the forum is prepared to invest their precious time in designing and developing a complete custom system for you, especially when you can by a ready built and tested unit. If you insist on building your own, I would suggest you start doing some research on the subject so that you can design it yourself.
Regards,
Keith
Yes am sureA one cm. object might need about 84 beams. Are you sure you want " any object " .
Always more information needed.
Then here is what I suggest you do. Purely for a home project and nothing industrial where life or limb may figure into things. I would go buy some of these or maybe some of these. All you need is a starter pack for a proof of concept and that takes care of the transmitter side. Then while you are at it buy some of these also so that takes care of the receiver end. Actually the plain sensors can also be bought so you don't need a few parts on the modules I linked. A Google of LASER Sensors or photo transistors should find some. I have played with some of those I linked to but have never really looked at the LASER dispersion over any distances so that is why I suggest buy a few and do a proof of concept. Get a few boards and drill mounting holes for the transmitters and receivers at precise intervals.Yes am sure
We have a bunch of light curtains at work, and I'm pretty sure they are all LED, not Laser. It cycles through each LED on the transmitter side, while reading *all* the sensors on the receiver side each time. This gives a sort of mesh of sensing lines, instead of just the individual rows. The LEDs need to have a wide enough angle to reach all of the sensors. The good ones in my experience are from Omron, formerly STI. I have also used Banner and Keyence. These all follow serious safety requirements, and they are not cheap. But I have never considered building my own. This is one I'll leave to the experts!OK, so the system needs to trigger on a 1CM object. That means that beam spread could easily be a problem unless lasers are used.
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