logo elektroda
logo elektroda
X
logo elektroda
Advanced Search
logo elektroda
Build faster with M5Stack »
Build faster with M5Stack » Stick • Unit • Cardputer
ADVERTISEMENT
Dostępna jest polska wersja

Czy wolisz polską wersję strony elektroda?

Nie, dziękuję Przekieruj mnie tam

A device that turns the room light on and off when you enter/exit the room

makar42 1803 13
ADVERTISEMENT
Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
Report a violation of the law
Reply | New topic
  • #1 19513577
    makar42
    Level 16  
    I've looked through the posts on this topic but haven't found one - I'm concerned with a device that will turn the light on in a room when you enter it and turn the light off when you leave.
  • ADVERTISEMENT
  • #2 19513613
    adwlodar
    Level 28  
    1. a normal lighting motion sensor - unless necessarily there must be no time delay after exit
    2. the cheapest photo line connected to a bistable relay - but what if two people enter and only one of them leaves? The other stays in the room with the lights off.
    3 - How about reed switches? Then the door must remain open.
    4. all of the above connected at the same time - full blast 🤭
  • #3 19513620
    Mobali
    Level 43  
    There are several solutions to this problem. The simplest is a limit switch mounted in the door. Unfortunately, inaccurate closing or opening can cause the system to malfunction. "Ordinary" motion sensors are not very precise and it can happen that the light goes out when there is not much movement.

    However, a special presence sensor , equipped with much more accurate detection systems (often several), will work much more precisely, also detecting micro-movements of the object. An example of this type of device could be the STEINEL IR Quattro HD or the KANLUX SENTO, but also many others. Of course, the detector (or detectors) must be selected according to the dimensions and shape of the room, also taking into account the optimum place for their installation.
    Helpful post? Buy me a coffee.
  • ADVERTISEMENT
  • #4 19513627
    adwlodar
    Level 28  
    Mobali wrote:
    STEINEL IR Quattro HD


    These sensors are some kind of cosmos.
    Can detect finger movement when typing on the computer keyboard.
  • #5 19514276
    Anonymous
    Level 1  
  • #6 19514536
    Mobali
    Level 43  
    adwlodar wrote:
    These sensors are some kind of cosmos. They can detect finger movement when typing on a computer keyboard.
    Maybe not "cosmos", but they work very well in this role. The disadvantage of any 'ordinary' PIR sensor is precisely the low sensitivity and the light switching off despite the presence of a person in the room.
    Erbit wrote:
    You can build a people counter in a room....
    It is certainly possible and would certainly work very well. However, I think it is a more complicated solution.
    Helpful post? Buy me a coffee.
  • ADVERTISEMENT
  • #7 19515879
    makar42
    Level 16  
    Unfortunately, none of the solutions proposed by colleagues fit my particular situation, namely, the room is entered from the corridor through an opening not equipped with a door, so reed switches are out. This is a room equipped with bookcases, behind which the person there may be "invisible" to the sensor's eye.
    I thought that there were ready-made solutions in which - on entry - the actuator is put into a "high state" (lighting up) and on exit into a "low state" (extinguishing ). So this is a task for electronic engineers....
  • ADVERTISEMENT
  • #8 19515971
    misiek1111
    Level 37  
    You could try a microwave detector, or use more detectors, covering the right areas.
  • #9 19516318
    adwlodar
    Level 28  
    makar42 wrote:
    This is a room equipped with shelving,
    .
    It is a question of the correct positioning of the sensors as well as the number of sensors.
    Large warehouse halls are also controlled by this solution with a sensor in each aisle, for example.
    There are so-called aisle sensors with a more long and narrow field of view.
    There are many off-the-shelf solutions.

    And a solution with a photo barrier connected to a bistable relay fits your situation - only you can't see it.
    The only problem is when different numbers of people enter/exit.
  • #10 19516367
    Anonymous
    Level 1  
  • #12 19517013
    Mobali
    Level 43  
    @makar42 , arguments I think are completely misplaced. I think most of the solutions indicated above will work in this situation too. Starting with more accurate presence sensors placed in strategic places in this room. But certainly the solution indicated by Col. Erbit will also work. All you have to do is read with understanding and adapt the solution to the new conditions you point out only at the end .

    Finally, it is difficult not to interject a small comment. I think that with such seniority on Elektroda you may have already learned that the problem is best described precisely at the beginning. It is hardly surprising that someone was not able to guess what the author had in mind AND whether the circuit is to be used in an ordinary loo, a secret room with shelves without doors or an atomic shelter, for example ;-) .
    Helpful post? Buy me a coffee.
  • #13 19517027
    makar42
    Level 16  
    I am closing the topic.
  • #14 19695808
    makar42
    Level 16  
    In the so-called "meantime", I found a product on the web called LUNO7. Has anyone perhaps used this device ?
Reply | New topic
Report a violation of the law

Topic summary

✨ The discussion revolves around devices that automatically control room lighting based on occupancy. Various solutions are proposed, including motion sensors, presence sensors, limit switches, and IR barriers. While standard motion sensors may lack precision, advanced presence sensors like the STEINEL IR Quattro HD and KANLUX SENTO offer improved accuracy by detecting micro-movements. A more complex solution involves using a people counter with IR barriers to track entry and exit. The author highlights challenges due to the room's design, which lacks a door, making traditional solutions less effective. The conversation concludes with a mention of a specific product, LUNO7, which the author is interested in.
Generated by the language model.
Today's popular

FAQ

TL;DR: Need lights that turn on when you walk in and off when you leave? Use a doorway people counter with two IR barriers; "As long as the number of people > 0 the light will stay on." It works even with shelves blocking view. [Elektroda, Anonymous, post #19514276]

Why it matters: Hands-free lighting that doesn’t leave you in the dark, even with open entries or obstructed sightlines, for DIYers and facility managers alike.

Quick Facts

What’s the best solution if my room has no door and shelves create blind spots?

Use multiple sensors positioned per aisle, or dedicated aisle sensors with narrow, long coverage. This mirrors warehouse layouts. A single photo barrier plus a bistable relay also fits open entries. However, mismatched entry/exit counts can leave someone inside without light. [Elektroda, adwlodar, post #19516318]

Will a standard PIR work, or do I need a presence sensor?

Standard PIR can miss small movements and switch lights off. Presence sensors detect micro‑movements and offer higher precision. Place them where they see occupants despite limited motion. “Also detecting micro-movements of the object.” Example models mentioned: STEINEL IR Quattro HD and KANLUX SENTO. [Elektroda, Mobali, post #19513620]

How do I deal with bookshelves that block the sensor’s view?

Cover each aisle with a sensor, or use aisle sensors designed for long, narrow fields. Correct positioning and adequate sensor count are critical. This mirrors proven layouts in larger storage spaces. Adjust placement to eliminate shadowed zones behind shelving. [Elektroda, adwlodar, post #19516318]

Can I build a reliable entry/exit counter to control the light?

Yes. Install two IR barriers one behind the other in the doorway. Use activation order to increment on entry and decrement on exit. Keep the light on while the people count is greater than zero. “As long as the number of people > 0 the light will stay on.” [Elektroda, Anonymous, post #19514276]

What if I want no time delay after exit?

Typical motion sensors impose a time delay. If you need immediate off, use a photo beam with a bistable relay. Note the failure case: if different numbers enter and leave, someone may remain inside with lights off. [Elektroda, adwlodar, post #19513613]

How do I prevent the light from switching off while I’m still inside?

Avoid basic PIR in low‑movement scenarios. Use presence sensors, which detect micro‑movements and avoid premature off events. As one expert noted, ordinary PIR can switch off “despite the presence of a person in the room.” Place detectors strategically for full coverage. [Elektroda, Mobali, post #19514536]

Can a microwave sensor help behind shelves or partitions?

Yes. Try a microwave detector, or add more detectors to cover the right areas. Microwave sensors can be less dependent on line‑of‑sight compared with PIR. Combine with proper placement to eliminate dead zones. [Elektroda, misiek1111, post #19515971]

Are there off‑the‑shelf kits for the two‑beam approach?

Yes. An example shared in the thread is AVT3014, an automatic lighting controller. It implements entry/exit beam logic without custom firmware. Use it to drive a lighting relay based on the live people count. [Elektroda, nikusert, post #19516370]

Do reed switches work without doors?

No. Reed-contact approaches assume a door and stable open/close states. They don’t suit open entries, and they can also misbehave if the door must remain open. Choose sensors or beam solutions instead. [Elektroda, adwlodar, post #19513613]

How many sensors might I need in an irregular, aisle‑like room?

It depends on geometry. Start with one sensor per aisle and adjust for coverage. Use aisle sensors if runs are long and narrow. Correct positioning and the right number of detectors achieve reliable presence detection. [Elektroda, adwlodar, post #19516318]

Is a device named LUNO7 a good fit here?

The thread only notes the LUNO7 name and asks for user feedback. No evaluations or experiences were posted. Check its specs and detection pattern against your room layout before buying. [Elektroda, makar42, post #19695808]

Which presence sensor brands were suggested in the thread?

STEINEL IR Quattro HD and KANLUX SENTO were cited as examples. These are presence‑grade detectors that sense micro‑movements. Select devices according to room size, shape, and the optimal mounting points. [Elektroda, Mobali, post #19513620]

Can I combine multiple detection methods for fail‑safe control?

Yes. You can combine motion, presence, beam, and contact methods into one scheme. This boosts reliability and reduces single‑point failures. The thread even suggests using them “all… at the same time.” [Elektroda, adwlodar, post #19513613]

What’s a quick 3‑step plan to set up a two‑beam counter for lights?

  1. Mount two IR barriers in the doorway, one behind the other.
  2. Detect beam order to increment on entry or decrement on exit.
  3. Drive a lighting relay while the people counter is greater than zero. [Elektroda, Anonymous, post #19514276]

What details should I share when asking for help on this problem?

Describe room dimensions, door presence, shelving layout, and desired on/off behavior. Share constraints like no time delay. As one expert put it, the problem is “best described precisely at the beginning.” This speeds accurate recommendations. [Elektroda, Mobali, post #19517013]
Generated by the language model.
ADVERTISEMENT