I know, software with miniature computers keep the parts count down, however, I'm an old analog guy. Anything without software makes me happy. 😀 Keep up the good work brother. ☮
Old stores around where i live used to use a light beam with photocell. shine the light on the photocell(crossing the path), if the beam gets broken you get DING-DONG or you could light a bulb. Doesn't detect motion but could work in a hallway as an early warning alarm. Love the videos!
Thanks a LOT for making this "how to" video!! I always wanted to make something that would have a sensor near the bottom of the stairs in my house, and then set up a lot l specific light somewhere in my bedroom, so that whenever someone were to start walking up the stairs, the light would go off (maybe also have a little buzzer that would go off for a short time, too), that way i would know that someone is coming up the stairs, without having to have super good hearing + no other audio sounds going on, both at the same time, in order to try to HEAR when someone is coming, I figured something like this had been done in a movie(s) at some point, and that it was probably something i may have seen in my childhood... Now I'm gonna have to go back and watch the movie you mentioned... See if that rattles any memories 😃 Thanks again for making this video! I found it VERY informative, & + I loved it!! Now that i know what all i would need in order to set all of this up, I MAY get one (or a few) going around the house 😆 & Like i mentioned, i might go the route of having an LED AND a small buzzer 😉 Thanks!! 👍👍👌 🤘😎🤘
There are a large number of simple and cheap alarm detectors. I have a fascination with such devices and have used many and designed a few. You could have covered the radar modules. Beam break alarms, these are to produce using the ir photodetector used in tv control receivers. More theatrical beam breaks can be produced by modulating a low cost laser pointer detected by a phototransistor. There are passive optical sensors than can be made by differential comparison of light focused on two photo transistors. I have come acroos the use of focusing an image on an optical mouse pointer. This is reportedly very good at producing an alarm produced by motion in its field of vision. There are low cost ultrasonic detectors that provide an alarm output on motion. Piezoelectric discs make excellent vibration detectors. This is just a few ideas.
It's just 3 variations of same methode to do a motion detector. You picked up a motion sensor from ebay and you've just played around with it. Other ways to do a motion sensor is to use a photo-resistor/ photo-diode in combination with a transistor/ op-amp. Or to use just an op-amp in open-loop configuration with an antenna.
I think there are a couple different kinds of motion sensors... from what I understand, PIR senses body or engine temperature differential, and then whatever other kind just senses motion? Which kind are you using here, and can you do a video on the difference?
I see what happened here. Classic hackaday comment to a MCU project, I could have done that with a 555. The next comment I could have done it with a transistor! I remember a 1970s series in the UK and Germany which reimagined Enid Blyton's Famous Five. One of the episodes had a similar device to warm about the butler (who was bad). That was a micro switch on a door, a PP3 battery and a doorbell.
Low voltage outdoor pir motion sensors are not as common as their mains power equivalent. There are a few that output an isolated logic signal that indicates when the PIR is triggered. One unfortunate design feature on these sensors, is that the PIR alarm output is conditioned by the output from an LDR that detects ambient light levels. This means the alarm only works after dark. I wish they would condition the light detector with the PIR. This would result in the alarm signal remaining active in day light, providing a useful alarm output even in day light, when the flood light control is no on. I assume that reason the logic is arranged as it is, is because the PIR can give false signals due to sunlight. The cheap 5 volt PIRs lack the range of the mains powered flood light control versions. Typically 5m compared to 15m
Here I thought you were going to present three different ways to detect the movement. You know perhaps using pressure switches, IR emitter/detector pairs, CdS light sensors. Not three ways to utilize the same simple binary IR motion detector module... Oh well...
Why so much negativity here? I simply remarked that I misunderstood the intent of the video title and gave my interpretation of it as a suggestion for future content. I never stated that I did not enjoy the video nor did I "moan and complain". Did you all gang up and berate the the person whose question prompted the creation of this video as well?
Thank you for your wonderful videos, they made my electronics school a breeze ❤
I know, software with miniature computers keep the parts count down, however, I'm an old analog guy. Anything without software makes me happy. 😀
Keep up the good work brother. ☮
Old stores around where i live used to use a light beam with photocell. shine the light on the photocell(crossing the path), if the beam gets broken you get DING-DONG or you could light a bulb. Doesn't detect motion but could work in a hallway as an early warning alarm. Love the videos!
Thanks a LOT for making this "how to" video!! I always wanted to make something that would have a sensor near the bottom of the stairs in my house, and then set up a lot l specific light somewhere in my bedroom, so that whenever someone were to start walking up the stairs, the light would go off (maybe also have a little buzzer that would go off for a short time, too), that way i would know that someone is coming up the stairs, without having to have super good hearing + no other audio sounds going on, both at the same time, in order to try to HEAR when someone is coming,
I figured something like this had been done in a movie(s) at some point, and that it was probably something i may have seen in my childhood... Now I'm gonna have to go back and watch the movie you mentioned... See if that rattles any memories 😃
Thanks again for making this video! I found it VERY informative, & + I loved it!! Now that i know what all i would need in order to set all of this up, I MAY get one (or a few) going around the house 😆
& Like i mentioned, i might go the route of having an LED AND a small buzzer 😉
Thanks!! 👍👍👌
🤘😎🤘
Great video as always. I remember setting up a laser pointer at an optic to trigger a transistor/light one time. Worked pretty well.
Think about all your videos sir it's very important for me ❤❤❤❤❤
There are a large number of simple and cheap alarm detectors. I have a fascination with such devices and have used many and designed a few.
You could have covered the radar modules. Beam break alarms, these are to produce using the ir photodetector used in tv control receivers. More theatrical beam breaks can be produced by modulating a low cost laser pointer detected by a phototransistor. There are passive optical sensors than can be made by differential comparison of light focused on two photo transistors. I have come acroos the use of focusing an image on an optical mouse pointer. This is reportedly very good at producing an alarm produced by motion in its field of vision.
There are low cost ultrasonic detectors that provide an alarm output on motion. Piezoelectric discs make excellent vibration detectors. This is just a few ideas.
I have. I've covered radar, laser, ultrasonic, and infrared. Please check playlists.
Love it..
It's just 3 variations of same methode to do a motion detector. You picked up a motion sensor from ebay and you've just played around with it. Other ways to do a motion sensor is to use a photo-resistor/ photo-diode in combination with a transistor/ op-amp. Or to use just an op-amp in open-loop configuration with an antenna.
this can be done with many different sensors in circuit as well either through infared or utrasonic to detect movement
I think there are a couple different kinds of motion sensors... from what I understand, PIR senses body or engine temperature differential, and then whatever other kind just senses motion? Which kind are you using here, and can you do a video on the difference?
Thank you!
I see what happened here. Classic hackaday comment to a MCU project, I could have done that with a 555. The next comment I could have done it with a transistor! I remember a 1970s series in the UK and Germany which reimagined Enid Blyton's Famous Five. One of the episodes had a similar device to warm about the butler (who was bad). That was a micro switch on a door, a PP3 battery and a doorbell.
Do you have any suggestion for a rain detector that wont consume power while its not raining?
Sure... I'll come up with a video
@@learnelectronics thank you, can't wait!
Low voltage outdoor pir motion sensors are not as common as their mains power equivalent. There are a few that output an isolated logic signal that indicates when the PIR is triggered.
One unfortunate design feature on these sensors, is that the PIR alarm output is conditioned by the output from an LDR that detects ambient light levels. This means the alarm only works after dark. I wish they would condition the light detector with the PIR. This would result in the alarm signal remaining active in day light, providing a useful alarm output even in day light, when the flood light control is no on. I assume that reason the logic is arranged as it is, is because the PIR can give false signals due to sunlight.
The cheap 5 volt PIRs lack the range of the mains powered flood light control versions. Typically 5m compared to 15m
Good video in response to the request. Is there a simple way to define the level of the output to differentiate between say a man and a dog
Other than aiming, no. This is a very indiscriminate sensor. Other types of sensors may give some selectability.
Can you pls make a 2.4ghz ? Using minimal components
Pls this is a viewer request please 😊
First!
Here I thought you were going to present three different ways to detect the movement. You know perhaps using pressure switches, IR emitter/detector pairs, CdS light sensors. Not three ways to utilize the same simple binary IR motion detector module... Oh well...
Sorry you didn't enjoy the video. The viewer wanted a motion detector to set off a blinking led. I presented 3 methods of varying difficulty.
Learn Electronics has contributed to the community with, presumably, zero cost to you. Why moan and complain about semantics?
Why so much negativity here? I simply remarked that I misunderstood the intent of the video title and gave my interpretation of it as a suggestion for future content. I never stated that I did not enjoy the video nor did I "moan and complain". Did you all gang up and berate the the person whose question prompted the creation of this video as well?