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89 posts

Master Geek


# 240743 24-Sep-2018 09:26
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Hi everyone.
I'v just moved house and now have a decent sized staircase to get from the drive to the house.
At night its almost pitch blank and you need to use a torch to see the stairs.

I have ordered some led strips which I am going to put under the hand rail to give light, but in a nice way, rather than just having a light on the roof shining down on you.
I want to make it a little fancy though, rather than just having the lights on all night.
My plan was to put a sensor at the top and bottom and a micro controller to fade in the lights when the sensor is tripped.
The problem im having is a PIR sensor triggers too much due to cars driving past, and the bushes moving in the wind. and I cant get a good trigger point which activates only on a person walking up the stairs.
So my plan was to move to a laser style tripwire. the ones they have in shops to ring the bell when you walk though.

The problem I have is I cant find a cheap "Kit set" one anywhere.
All the ones i can find online are expensive all in one sets. mostly wireless, and with the doorbell unit.
Where as I just want the sensor I can wire directly into my arduino.

 

I was thinking of making my own with a $2 laser pointer and light sensor, but I have no idea how feasible that is.
During the night it would work, but I also want it to work during the day as I want to hook it up to other things such as a doorbell and security camera.

Any ideas where I can get / make a sensor / trip wire?

(Im wanting about 3 as well to put at various points on the stairs to trigger)


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4667 posts

Uber Geek

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  # 2095319 24-Sep-2018 09:43
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keeping an eye n this.  Was thinking about the same method as you, but I'd actually thought of reflecting the laser in a box/triangle back to the origination spot for detection.

 

 





Previously known as psycik

OpenHAB: Gigabyte AMD A8 BrixOpenHAB with Aeotech ZWave Controller, Raspberry PI, Wemos D1 Mini, Zwave, Xiaomi Humidity and Temperature sensors and Bluetooth LE Sensors
Media:Chromecast v2, ATV4, Roku3, HDHomeRun Dual
Windows 10
Host (Plex Server/Crashplan): 2x2TB, 2x3TB, 1x4TB using DriveBender, Samsung 850 evo 512 GB SSD, Hyper-V Server with 1xW10, 1xW2k8, 2xUbuntu 16.04 LTS, Crashplan, NextPVR channel for Plex,NextPVR Metadata Agent and Scanner for Plex


543 posts

Ultimate Geek

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  # 2095320 24-Sep-2018 09:44
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PIR sensors should not pickup anything outside unless you have a giant hole in your wall that it can see through.

 

Walls and even glass(take a look at the mythbusters crimes and myth-demeanors episode) do block IR





Geoff E

 
 
 
 




89 posts

Master Geek


  # 2095322 24-Sep-2018 09:48
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geocom:

 

PIR sensors should not pickup anything outside unless you have a giant hole in your wall that it can see through.

 

Walls and even glass(take a look at the mythbusters crimes and myth-demeanors episode) do block IR

 



Sorry should have said in original posting.
Stairs are outside the house, so sensors are outside as well.




89 posts

Master Geek


  # 2095324 24-Sep-2018 09:50
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davidcole:

 

keeping an eye n this.  Was thinking about the same method as you, but I'd actually thought of reflecting the laser in a box/triangle back to the origination spot for detection.

 



Was thinking this method as well. so only have to run power to one side of the stairs.


568 posts

Ultimate Geek

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  # 2095325 24-Sep-2018 09:55
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Currently on a very good special. I've not used one so can't comment on how good it is.

 

https://www.jaycar.co.nz/commerical-grade-doorway-beam/p/LA5196

 

 


543 posts

Ultimate Geek

Subscriber

  # 2095334 24-Sep-2018 10:04
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Have you thought about using a PIR anyway and just making a blocker.

 

PDL sell a PIR switch that fits in their wall plates it includes a tripwire cover plate which is just a cover plate with a hole in it, not suggesting you buy that as it will be 230v but you could use it as a starting point.

 

It would be a lot more power efficient and you would only need to supply power one side





Geoff E

 
 
 
 




89 posts

Master Geek


  # 2095339 24-Sep-2018 10:08
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geocom:

 

Have you thought about using a PIR anyway and just making a blocker.

 

PDL sell a PIR switch that fits in their wall plates it includes a tripwire cover plate which is just a cover plate with a hole in it, not suggesting you buy that as it will be 230v but you could use it as a starting point.

 

It would be a lot more power efficient and you would only need to supply power one side

 



Its my backup plan, would prefer the tripwire solution as then it gets rid of all false alerts.
But if not then ill look at cheap PIR with blocking




89 posts

Master Geek


  # 2095340 24-Sep-2018 10:09
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wellygary:

 

If you are looking for an arduino solution, how about these..

 

https://www.jaycar.co.nz/arduino-compatible-red-laser-diode-module/p/XC4490

 

https://www.jaycar.co.nz/arduino-compatible-photosensitive-ldr-sensor-module/p/XC4446

 

 

 



Its a plan, but I have no idea how reliable it would be outdoors, in direct sunlight.
or if its raining heavily.
etc




89 posts

Master Geek


  # 2095407 24-Sep-2018 11:56
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Finally managed to find some on AliExpress.
Changed what I was searching for and heaps popped up.
Search for "Security Beam" sort by lowest price, and heaps of them are there, exactly what im after.
Will update when I finally get one as to how reliable it is


2146 posts

Uber Geek


  # 2095417 24-Sep-2018 12:09
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Common terms for what you're looking for are: photoeye or light barrier.




Location: Dunedin

 


4667 posts

Uber Geek

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  # 2095442 24-Sep-2018 12:42
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pomtom44:

 

Finally managed to find some on AliExpress.
Changed what I was searching for and heaps popped up.
Search for "Security Beam" sort by lowest price, and heaps of them are there, exactly what im after.
Will update when I finally get one as to how reliable it is

 

 

Links?

 

 

 

Are you going to take a feed from it, for something else, or are you just wanting a light/siren?  I'd want to get a feed to my home automation system, so I could generate an alert for a camera rather than relying on it's motion detection.





Previously known as psycik

OpenHAB: Gigabyte AMD A8 BrixOpenHAB with Aeotech ZWave Controller, Raspberry PI, Wemos D1 Mini, Zwave, Xiaomi Humidity and Temperature sensors and Bluetooth LE Sensors
Media:Chromecast v2, ATV4, Roku3, HDHomeRun Dual
Windows 10
Host (Plex Server/Crashplan): 2x2TB, 2x3TB, 1x4TB using DriveBender, Samsung 850 evo 512 GB SSD, Hyper-V Server with 1xW10, 1xW2k8, 2xUbuntu 16.04 LTS, Crashplan, NextPVR channel for Plex,NextPVR Metadata Agent and Scanner for Plex


3060 posts

Uber Geek

Lifetime subscriber

  # 2095444 24-Sep-2018 12:46
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Some links from my AliExpress "May be interesting sometime" electronics wishlist. The bottom one may be useful to you? Although I'm not quite sure what "proximity" means in that context.

 

https://www.aliexpress.com/item/-/32908633788.html?spm=a2g0s.8937460.0.0.34672e0edIVXuq

 

https://www.aliexpress.com/item/-/32860393398.html?spm=a2g0s.8937460.0.0.34672e0edIVXuq

 

https://www.aliexpress.com/item/GY-9960LLC-APDS-9960-RGB-and-Gesture-Sensor-Module-I2C-Breakout-for-Arduino/32746460216.html?spm=a2g0s.8937460.0.0.34672e0edIVXuq

 

https://www.aliexpress.com/item/APDS-9930-Proximity-Sensor-Approaching-and-Non-Contact-Proximity-Module-CKIN/32746850298.html?spm=a2g0s.8937460.0.0.34672e0edIVXuq

 

If you use WS2812 LEDs (either strips or discrete) for the lights, you can illuminate just the partin front of the person (assuming they move at a standard speed).

 

 




89 posts

Master Geek


  # 2095929 25-Sep-2018 08:05
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davidcole:

 

pomtom44:

 

Finally managed to find some on AliExpress.
Changed what I was searching for and heaps popped up.
Search for "Security Beam" sort by lowest price, and heaps of them are there, exactly what im after.
Will update when I finally get one as to how reliable it is

 

 

Links?

 

 

 

Are you going to take a feed from it, for something else, or are you just wanting a light/siren?  I'd want to get a feed to my home automation system, so I could generate an alert for a camera rather than relying on it's motion detection.

 



https://www.aliexpress.com/item/PHOTOCELLS-UNIVERSAL-INFRARED-SAFETY-BEAM-FOR-GATE-AUTOMATION-SECURITY-ALARM/32808982215.html?spm=2114.search0604.3.1.74c56895X33o2l&ws_ab_test=searchweb0_0,searchweb201602_1_10065_10068_10547_10059_10884_10548_10887_10696_100031_10084_10083_10103_10618_10307,searchweb201603_45,ppcSwitch_5&algo_expid=feac852f-a31a-4a40-8d5b-e929860ba677-0&algo_pvid=feac852f-a31a-4a40-8d5b-e929860ba677&transAbTest=ae803_1&priceBeautifyAB=0

Im going to be taking the output from the sensor and putting it into an arduino. then from there I can program it to do anything I need.
Turn on the LED lights for the stairs, trigger a doorbell inside the house, and trigger a camera record 
(Still need to find a cheap arduino with ethernet, but that my next post on here)


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