Read the statement by Michael Teeuw here.
PIR sensor behind glass?
-
@Knox Yeah, thanks, my Fresnel lens isn’t even fixed to the PIR sensor and comes off right away if you don’t find some way of keeping it there ;-). But you’re right, didn’t think of that, it’s actually covered by this plastic dome. Maybe if I install the PIR sensor in the frame of the mirror and cover that section of the frame with acrylic glass, such as Plexiglas, it might work and look alright. Will try and test if my sensor detects IR behind a sheet of acrylic glass.
-
that would be a good test, but just note you’ll be lowering its effective area. Which for a mirror might be fine, as you normally stand directly infront of it.
-
Sure, I guess I’d have to play around with its sensitivity, will keep you updated on the outcome of my tests
-
Pir isn’t really an option behind glass. There’s a cam based solution which works through the mirror.
That said, my mirror is full sized and the pir peeks out the bottom… You’d never know it’s there unless you know where tot look…
-
@RedNax Can you share a picture? 😊
-
@Cato No problem… anyone care to donate to the WWF Panda?
There’s a PIR sensor on the bottom of the mirror, out of eyesight. It detects … well… hot legs :D
-
@RedNax Your mirror looks really cool.
Our mirror will be mounted pretty much at eye level so having the sensor at the bottom of the frame won’t be an option for me, but I’m already experimenting with covering the sensor with plastic stuff ^^.
Is there an xkcd module I’m not aware of?
And may I ask where you got your glass? Some of the pictures I’ve seen look like you can still see the monitor behind the glass but with your mirror that doesn’t seem to be the case.
-
@yo-less Thanks!
The mirror is from a dutch webshop… At night, when there’s no other illumination you do see the backlight of the screen shining through… In the daytime it looks like the picture.
I’ve been pondering altering the backlight/brightness of the screen according to ambiant lightlevels… unfortunately this is only controllable by navigating the screens menu as opposed to discrete buttons…Oh, and yes… there is: https://github.com/RedNax67/DailyXKCD
It’s forked from the original author… Ive added the random comic on non comic days…
-
@RedNax Alright, is that the case with all types of glasses? I guess it would be?
-
@yo-less It think all mirrors suffer from this… You need enough brightness to show things in the day… Which will be overkill at night…
-
@RedNax Apparently some monitors seem to allow for external commands to change the light levels:
http://lifehacker.com/5985364/change-your-monitors-brightness-without-fiddling-with-its-buttonsThey seem to have to support DDC/CI and if there is a tool for Windows PCs there should be some way to get the same thing done on a Pi?
-
@yo-less said in PIR sensor behind glass?:
Can a PIR sensor be covered by anything at all or does any kind of material automatically block motion detection?
You really can’t cover a PIR it just won’t work… BUT you can remove the ‘dome’ and incorporate into the frame a little better OR you can just put it into the frame with the ‘dome’ on it and make it decorative…
-
@yo-less changing the brightness would be really nice… having it automatic would be better… you know at a certain time of night it dims automatically… but there is this…
-
@cowboysdude Thanks for the link. Does f.lux have access to the monitor’s brightness settings? As this has nothing to do with my original question I will start a new topic concerning the brightness issue at night.
-
@cowboysdude We might just drill a tiny hole into the frame of the mirror and put the PIR behind it without its Fresnel cover. Will experiment with that idea some more.
-
@yo-less said in PIR sensor behind glass?:
@cowboysdude We might just drill a tiny hole into the frame of the mirror and put the PIR behind it without its Fresnel cover. Will experiment with that idea some more.
That’s the approach I was thinking of. Which PIR will you use?
-
@yawns I’ve got the HC-SR501 / D-SUN RCW-0506 and it’s working as it should.
I paid €8 for two sensors and shipping to Germany. The one in use even survived my failed attempts at connecting it to the correct pins :). -
I just like the camera… it’s a personal choice :) But drilling a hole will work too!! I don’t see a thing wrong with that!
-
@cowboysdude I’m just not comfortable with the idea of a camera in my bathroom (or any other room, for that matter). Raspbian is a pretty open platform and I don’t want others to take control of any cameras I might have installed in my home. And it’s not like all sorts of people wouldn’t be interested in spying on other people.
Have started experimenting with the PIR sensor, it’s looking good so far, will let you guys know about my progress.
-
Another possibility: I ordered a couple of these $2 microwave radar motion detectors to see if they will work behind my glass. Still waiting to receive them though:
More details:
http://www.cnx-software.com/2016/04/04/tiny-microwave-radar-module-detects-movements-up-to-9-meters-away-for-2/amp/
Hello! It looks like you're interested in this conversation, but you don't have an account yet.
Getting fed up of having to scroll through the same posts each visit? When you register for an account, you'll always come back to exactly where you were before, and choose to be notified of new replies (either via email, or push notification). You'll also be able to save bookmarks and upvote posts to show your appreciation to other community members.
With your input, this post could be even better 💗
Register Login