It would be used in some sort of RasPi or Arduino configuration.
I have grown more and more hard of hearing as I grow older. and I cannot always hear when someone is at the front door. I'm looking for a motion sensor that I can locate inside the front window.
I have played briefly with an old Radio Shack infrared motion alarm that otherwise works fine, but can't "see" through glass at all.
I also have a little Wyze security camera that can detect motion, but it seems way TOO sensitive to be useful.
Could ultrasonic be the way to go? That's a technology I've yet to play
with. It would be used in some sort of RasPi or Arduino configuration.
Chris Schram wrote:
It would be used in some sort of RasPi or Arduino configuration.
That might work, but it's a lot of hassle and complication. The doorbell already is an electric signal. Could you not use that directly?
On Thu, 23 Dec 2021 21:53:27 +0000, Chris Schram wrote:
I have grown more and more hard of hearing as I grow older. and I cannot
always hear when someone is at the front door. I'm looking for a motion
sensor that I can locate inside the front window.
I have played briefly with an old Radio Shack infrared motion alarm that
otherwise works fine, but can't "see" through glass at all.
I also have a little Wyze security camera that can detect motion, but it
seems way TOO sensitive to be useful.
Could ultrasonic be the way to go? That's a technology I've yet to play
with. It would be used in some sort of RasPi or Arduino configuration.
I have purchased (through AliExpress) a number of RCWL0516 "Doppler Microwave" motion sensors that provide (among other things) a
single-bit binary interface suitable for use with one of the Raspberry
PI's digital pins.
As the device uses weak microwave radiation, it can sense motion
through glass, brick or drywall, and has an adjustable range of up to
5 metres (about 15 feet) depending on the intervening media.
These devices typically cost less that $1.00 (excluding shipping).
Perhaps one of these would work for you.
Chris Schram wrote:
It would be used in some sort of RasPi or Arduino configuration.
That might work, but it's a lot of hassle and complication. The doorbell already is an electric signal. Could you not use that directly?
Heh! You don't know about my doorbell.
I have grown more and more hard of hearing as I grow older. and I cannot always hear when someone is at the front door. I'm looking for a motion sensor that I can locate inside the front window.
I have played briefly with an old Radio Shack infrared motion alarm that otherwise works fine, but can't "see" through glass at all.
I also have a little Wyze security camera that can detect motion, but it seems way TOO sensitive to be useful.
Could ultrasonic be the way to go? That's a technology I've yet to play
with. It would be used in some sort of RasPi or Arduino configuration.
I cannotLook at Andreas "guy with the swiss accent" Spiess on youtube, he has videos on various sensor types, including radar type, and connecting to rPi and microcontrollers.
always hear when someone is at the front door. I'm looking for a motion sensor that I can locate inside the front window.
I have grown more and more hard of hearing as I grow older. and I cannot always hear when someone is at the front door. I'm looking for a motion sensor that I can locate inside the front window.
I have played briefly with an old Radio Shack infrared motion alarm that otherwise works fine, but can't "see" through glass at all.
I also have a little Wyze security camera that can detect motion, but it seems way TOO sensitive to be useful.
Could ultrasonic be the way to go? That's a technology I've yet to play
with. It would be used in some sort of RasPi or Arduino configuration.
On Thu, 23 Dec 2021 21:53:27 +0000, Chris Schram wrote:
I have grown more and more hard of hearing as I grow older. and I cannot always hear when someone is at the front door. I'm looking for a motion sensor that I can locate inside the front window.
I have played briefly with an old Radio Shack infrared motion alarm that otherwise works fine, but can't "see" through glass at all.
I also have a little Wyze security camera that can detect motion, but it seems way TOO sensitive to be useful.
Could ultrasonic be the way to go? That's a technology I've yet to play with. It would be used in some sort of RasPi or Arduino configuration.
I have purchased (through AliExpress) a number of RCWL0516 "Doppler Microwave"
motion sensors that provide (among other things) a single-bit binary interface
suitable for use with one of the Raspberry PI's digital pins.
As the device uses weak microwave radiation, it can sense motion through glass,
brick or drywall, and has an adjustable range of up to 5 metres (about 15 feet)
depending on the intervening media.
These devices typically cost less that $1.00 (excluding shipping).
Chris Schram wrote:
Heh! You don't know about my doorbell.
Correct. In that case I modify my suggestion and suggest that a
microphone with some very simple electronics right next to the clanger
is simpler and more relible than anything optical.
Easy to set up initially but might be very hard (fft) if it has to distinguish the bell from other sounds, if those are about the same level.
So I'd be inclined to fit a microswitch to the bell mechanism. Easy, direct on/off signal but probably a little more finicky to set up.
I have grown more and more hard of hearing as I grow older. and I cannot always hear when someone is at the front door. I'm looking for a motion sensor that I can locate inside the front window.
I have played briefly with an old Radio Shack infrared motion alarm that otherwise works fine, but can't "see" through glass at all.
I also have a little Wyze security camera that can detect motion, but it seems way TOO sensitive to be useful.
Could ultrasonic be the way to go? That's a technology I've yet to play
with. It would be used in some sort of RasPi or Arduino configuration.
I have grown more and more hard of hearing as I grow older. and I cannot >always hear when someone is at the front door. I'm looking for a motion >sensor that I can locate inside the front window.
I have played briefly with an old Radio Shack infrared motion alarm that >otherwise works fine, but can't "see" through glass at all.
I also have a little Wyze security camera that can detect motion, but it >seems way TOO sensitive to be useful.
Could ultrasonic be the way to go? That's a technology I've yet to play
with. It would be used in some sort of RasPi or Arduino configuration.
I have played briefly with an old Radio Shack infrared motion alarm that >otherwise works fine, but can't "see" through glass at all.
Could ultrasonic be the way to go? That's a technology I've yet to play
with. It would be used in some sort of RasPi or Arduino configuration.
On 23/12/2021 21:53, Chris Schram wrote:
Could ultrasonic be the way to go? That's a technology I've yet to play
with. It would be used in some sort of RasPi or Arduino configuration.
Ultrasonic wont see through glass or the clear lid of an electronic box,
(I did check to be sure). So it would need to be mounted externally, and
then you have the problem of weather proofing.
On Thu, 23 Dec 2021 21:53:27 -0000 (UTC), Chris Schram <chrispam1@me.com> declaimed the following:
Not really surprising -- it's one reason car and home interiors get warm when the sun shines on glass. Ultraviolet light passes through glass, gets absorbed by fabrics and what-have-you on the inside, and those items then re-radiate the energy in the infrared band.
I have played briefly with an old Radio Shack infrared motion alarm that
otherwise works fine, but can't "see" through glass at all.
Could ultrasonic be the way to go? That's a technology I've yet to play
with. It would be used in some sort of RasPi or Arduino configuration.
Sorry -- ultrasonic sensors will reflect off the window itself. You'll pretty much have to fit the sensor (for almost anything except image processing type detection [this image differs from last image]) outside the window and run leads to the R-Pi (or whatever you use to process data).
A PIR sensor /might/ be usable in daylight (they are commonly used for auto-activation motion detect security lights). They trigger on an IR
source moving between segments in the sensor window. https://learn.adafruit.com/pir-passive-infrared-proximity-motion-sensor/how-pirs-work
Ultrasonic ("PING)))" -- yes, the ))) is part of the name for some) sensors are more distance detection items than motion sensors, and may not have a great range. Some old Polaroid cameras used them for focusing -- but one has to account for the default focus being "infinity", and
depth-of-field on those being deep enough that anything around 15+ feet was considered "infinity".
https://www.parallax.com/product/ping-ultrasonic-distance-sensor/ (10ft range)
https://learn.adafruit.com/ultrasonic-sonar-distance-sensors (suggests
13ft, but recommends 8ft)
Could ultrasonic be the way to go? That's a technology I've yet to play
with. It would be used in some sort of RasPi or Arduino configuration.
On 24/12/2021 16:32, Dennis Lee Bieber wrote:
On Thu, 23 Dec 2021 21:53:27 -0000 (UTC), Chris Schram <chrispam1@me.com>
declaimed the following:
Not really surprising -- it's one reason car and home interiors get
I have played briefly with an old Radio Shack infrared motion alarm that >>> otherwise works fine, but can't "see" through glass at all.
warm when the sun shines on glass. Ultraviolet light passes through
glass,
gets absorbed by fabrics and what-have-you on the inside, and those items
then re-radiate the energy in the infrared band.
Could ultrasonic be the way to go? That's a technology I've yet to play
with. It would be used in some sort of RasPi or Arduino configuration.
Sorry -- ultrasonic sensors will reflect off the window itself.
You'll
pretty much have to fit the sensor (for almost anything except image
processing type detection [this image differs from last image])
outside the
window and run leads to the R-Pi (or whatever you use to process data).
A PIR sensor /might/ be usable in daylight (they are commonly used
for
auto-activation motion detect security lights). They trigger on an IR
source moving between segments in the sensor window.
https://learn.adafruit.com/pir-passive-infrared-proximity-motion-sensor/how-pirs-work
Ultrasonic ("PING)))" -- yes, the ))) is part of the name for some)
sensors are more distance detection items than motion sensors, and may
not
have a great range. Some old Polaroid cameras used them for focusing
-- but
one has to account for the default focus being "infinity", and
depth-of-field on those being deep enough that anything around 15+
feet was
considered "infinity".
https://www.parallax.com/product/ping-ultrasonic-distance-sensor/ (10ft
range)
https://learn.adafruit.com/ultrasonic-sonar-distance-sensors (suggests
13ft, but recommends 8ft)
I've got a Raspberry Pi B with a Pi Camera mounted and use the 'motion' package to record video when motion is detected - through a window.
Video is not very high quality, but you don't need that.
You could use inotify to watch the destination directory and email you
when motion is recorded.
On 2021-12-23, Axel Berger <Spam@Berger-Odenthal.De> wrote:
Chris Schram wrote:
It would be used in some sort of RasPi or Arduino configuration.
That might work, but it's a lot of hassle and complication. The doorbell already is an electric signal. Could you not use that directly?
Heh! You don't know about my doorbell. It's a brass replica of an antique. You twist a knob on the outside of the door which spins a clapper against
the bell on the inside. No electronics, or even electricity involved.
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