Very good video, with lots of info & well delivered. I wonder how this channel flew under my radar (pun intended) for so long. Subscribed! 👍🏻 Now, I have a couple of things I'd like to point out if I may. 8:07 The circular thingy serves as a capacitor for the oscillator (high-frequency NPN transistor), not an antenna. The antenna is at the other side, & it's a common transmit/receive antenna. 10:44 Although the LED pins are correct (anode = longer), the internal electrodes are wrong (anode = smaller, not bigger). I'm pointing this out because I believe one should look at the internal electrodes to figure out polarity, instead of the external ones, since the latter can be cut. & if people learn it wrong from this video, they may run into problems in the future. 20:02 I'd pull the button Pin to LOW, instead of HIGH, for two reasons. - If you pull it HIGH, you're constantly sinking 0.5mA, regardless of the button's state. Yes, that current is negligible in this circuit, but I believe it's important to adopt "good habits" anyway. In the case of microcontrollers, taking their limited power capabilities into consideration is one of them. - It feels more intuitive to "send a signal" to the Pin when the button is pressed, instead of "disrupting a signal". I believe it's easier for less experienced tinkerers to understand too. From what I've read (I haven't tried them myself, yet), those sensors don't interfere with other GHz devices (routers etc). Apparently they don't interfere with each other either! So using BT shields should work well too.
Always the best from DroneBot Workshop!!! I just received five RCWL-0516 modules from aliexpress with intentions of setting up security zones for my property , with this very helpful video I think this will be the start of something very interesting, thanks for the upload.
Just watched your tutorial and set up a new rcwl-0516 as I watched. I bought 20 and the 1st one I tested works very well. It's set up in front of the TV pointing back at me and it is very responsive and stable behavior too. Great channel and tutorial. Thanks!
Perfectly explained! Thank you. I connected the sensor without Arduino to a "remote doorbell button". Battery operated, small size, can be placed wherever it suits. The bell then rings (or just the LED flashes) when someone enters the controlled zone. Works through walls and doors!
Hello !! I'm about to prepare myself in making an alarm for my workshop and garage, your video has been more than useful to my future project. Nice explainations and many details. Good Job, keep on instructing us !! Long life to your channel
Vos vidéos sont très intéressantes et vos explications très claires, avec un réel souci de pédagogie. En vous suivant, je m'améliore. Je vous remercie très sincèrement pour ce partage.
As always, you explained things that is easy to understand with actual example and links to the codes, docs etc.. Keep up the good works. Thank you! New subs here!
So useful I bought some! Thank you. A good, concise video. I attached the output signal to an optocoupler relay module and the relay switches, so that's good! I've also found that if you keep moving around, the sensor is always active so the relay stays on E.G. running a light bulb, alarm etc. turns off once movement stops. would be good for a self contained alarm/light/ device on its own without needing an Arduino (or Picaxe in my case) so saving a few quid!!!! thank you again, You"ve got a new subscriber :-)
Hi, this is the first time I've been here, I'm a retired electronics tech, Marines, not played with electronics much for twenty years, but collected some arduino oriented electronics, off ebay, and low and behold, here's how to use the very module I selected for a burglar/security alarm system for my home. Great teaching skills, very clear explanations, nice easy pace. I look forward to getting caught back up, at least as much as necessary. How did you know I bought that doppler radar device?
Very interesting and informative video. The RCWL-0516 is now on my list future projects. I also particularly appreciate the care and preparation put into the production, and the use of high quality video. Too often videos like this are made with low resolution video so that the code examples and diagrams are unreadable.
I think it's more appropriate to call this a motion sensor, or motion detection module. It has no capability to detect 'proximity'. Any stationary object in the sensors proximity will not be detectable nor can it determine the distance to an object's proximity.
Excellent video! The speed of instruction is perfect for the average mind and the illustrations are precise and well-synced with the language. But why the dropping resistor? I built the circuit on a breadboard using a 3.3v LED to match the 3.3v level of the output pin. Also, LEDs come in varying voltage ratings; 3.3v being just one. I also want to try replacing the LED with a piezoelectric element to see if the output pin has enough grunt to drive it.
Excellent! Waiting for my sensors to arrive. Practical discussion of using PIR or ultrasound vs this radar sensor (range, false positives, penetration of glass windows, etc) will be addressed in my own experiments. It would be nice if the sensor did not stay on for two seconds so it could be rotated and data collected in many directions in real time. Thanks for your great projects, well explained, as always.
There are other microwave sensors out there that just output the raw data but they seem to be more difficult to operated. As these are so cheap, you could use two or more pointing to different directions?
Thanks for all your videos, especially this one. It made it much easier for me working with the RCWL-0516 doppler sensor and it's application. I'm new for this type of module sensors. Thank's again. Mr.G ( PS:I would like to know more abut your newsletter !)
Great stuff!..I bought some doppler modules, and was looking for a way to control their output for lighting a room.I need an arduino lol.. thanks for explaining in a great relaxed concise manner. Fantastic video :-)
Hi all! Thank you Bill for that video. I have a problem with my chickens. They always come to my patio and make it dirty. My project is to create a forbidden zone. So, I experimenting with a system to chase them away. I plan to use the product shown in this video to pilot two perpendicular air jets. These streams should be oriented on each side like a barrier and start simultaneously when a bird approches. To synchronize the actions, I wonder if that way of proceeding is a relevant choice in terms of sensitivity and speed. If someone has an idea or an experience, I'm interested. I look forward to reading you. Thank you very much. Philippe
Hi, First I have to say that I really enjoy your instructional videos. You are one smart cookie. Keep em coming :) Secondly, I purchased the RCWL-0156 sensor and wired it up, both on its own, and then to an UNO, as per your instructions. ( I have a fair bit of experience with Arduino, and everything related to it, so I am confident that I connected everything properly) . I used a 220 ohm resistor for the out pin to the led. My issue is that although the RCWL functions properly. (IE: The led lights up when the sensor senses movement), it only has a range of 2cm. It doesn't pick up anything further than that. I received 5 units in my order, and tested all of them, and they all have the same range (2cm). Has anybody else experienced the same issue. Any ideas as to what could be wrong. PS: I tested with 2 different power supplies, first the UNO, and then I hooked up my Korad KA3005D set first to 12 volts, then to 24 volts and 0.003 amps. The sensing range was the same for all tests. Could it be a bad batch of sensors ? Cheers, T
I'm glad for this vid. I'm useing the 0516 with a GSM (A6) with a uno to make a alarm, I got the code for the 0516 right but to send a sms is a bit more difficult but getting there. I hope when I get to figure every thing out to make a video of what I did and also with the code but got to get the code for the sms right. But nice video
Another side benefit of this circuit with remote is the microwaves knock out car key remotes , so if your car key is cloned no one can use it anyway cause the only way to open car is with key manually while the detector is running when you come back turn off microwave and you can open car again
Ive used this to detect if my cats are outside my door. Its hooked up to a transistor that turn on leds that light up a cat shaped 3dprinted figurine. Been working fine outside for a couple of years now.
Why the comment about the safe use of microwaves when using this board? I don't understand. Aren't microwaves all over the place already? Nobody mentions safety when working with IR emitting devices. IR radiation is of both higher energy and absorbance by the body. BTW...Great video!
The ldr-resistor example would be great for a war droid at night in sleep mode.Working on a turret right now.A few gesture sensors paintball gun and some high grade steppers systems.Converting some old solar panels to power it.
Allo and thank you very much for the great knowledge you share with us , my question about this microwave sensor is : Range ; is there a way to have a set range ,meaning ignore from X range and more but when movement is inside the set range then an action is taken ?
Tiny nit to pick; The dopper effect was not *discovered* by Doppler, Doppler was the best known source for a detailed description of the ffect. A bit like how Tesla is credited for inventing wireless power transmission even though induction and radio had been wel documented long before Tesla's grandparents where born.
When you explain the Doppler effect, you show the base frequency as 1000Hz and then 2000hz when object is approaching. Think about that for a moment, that can only be true when the frequency is doubled, or when the emitter is moving the same speed as the wave. Either Mach1 for sound or Warp1 for radio waves. But, how do you make sure the emitter isn't arriving at the observer Before the wave? Typically, Doppler doesn't operate on such extreme multiples or fractions of the base frequency that you presented.
I just discovered this sensor last week, its very neat! I'm surprised its taken me this long to realize it exists as it seems to be a fantastic replacement to a conventional PIR sensor, and equal or better costwise as well. In fact now I'm wondering why anyone would use PIR when this is available. Can you (or anyone) breakdown any pros/cons between the two? So far it seems like a no brainer to go with this instead.
One corn i observed was this sensor is sensitive for motions beyond the walls or even doors so its not good if you are placing this on a wall to monitor motion within a particular room.
I like seeing different modules tested and used, it is a good way to get ideas. Why do you believe it uses doubler effect? My guess is that it works the same way as ultrasonic movement sensors (Not distance measurement) and PIR detectors. That is you get some "DC" level depending on the environment, if anything moves in the environment this level will change. The chip will amplify these changes and if they are above a threshold trigger the output. Another detail is your switch connection, why use a resistor? A single line in the program will make the resistor obsolete.
A comparison and more detailed explanation can be found in a video by Andreas Spiess at ua-cam.com/video/9WiJJgIi3W0/v-deo.html What you are referring to by "DC" level is the (processed) output of a sensor device. Radar, ultrasound and pir sensors each use a different physical phenomenon to obtain a measurement. Regarding the resistor: the internal pull-up resistor inside the MCU(which is what you are referring to) is rather large and can vary between a relatively large range. It will be sufficient in most circumstances. However, if you have bad luck and have a MCU batch where the pullup's are rather big, the pull-up effect can be too weak in a noisy environment and cause false triggers. Therefore it is good practice to use an external and known resistor. That way, you can create more robust hardware and decrease its value for noisy environments. Often this is also combined with a small capacitor (e.g. 100nF) to suppress/filter any picked up high frequency noise.
since this rcwl-0516 can detect object from above, beneath, left and right, and how can one/the arduino knows where the object is moving from ??? thanks for your time and your input and this tutorial;
Really good video. Thanks for sharing your knowledge. I have one question please. The object must be in front of the antenna or is it able to detect movement of objects that are not perpendicular to the antenna? Best regards from Valencia, east coast of Spain.
Good work, Le radio-Amateur peut vous confirmé que le 2.4Ghz ne sera pas interféré par le 3.18 Ghz et vice-versa. Les fréquences sont suffisamment éloigné l'une de l'autre sans être une harmonique.
Thanks, broad coverage. Excuse my ignorance, but how would it be possible to power a AC 230V light bulb without the Arduino, viz as standalone solution for LED as you described from 10:00, indeed AC relays require 5V DC and with RCWL-0516 the ouput is 3.3V.
Good video. I attempted to use one of these RCWL-0516 sensors with an ESP32 (client) configured to send the motion detected via ESP-NOW to another ESP32 (server). Unfortunately I’ve come across a small problem. The Wi-Fi function of the ESP32 causes false triggering of the RCWL-0516 if it is in close proximity to the ESP32. I don’t thinking it is the sending of the ESP-NOW messages causing the problem but when the ESP32 module comes out of deep sleep and the Wi-Fi initialises.
I have been making attempts with a great deal of failure due to PIR sensors instability . These PIR sensors seem to have a mind of their own going high for no reason. They all do the same even at minimal sensitivity settings. My Build design consists of one Servo motor to provide Panning .. Also four PIR sensors facing North, East, West and south. as each sensor goes HIGH the servo turns in the direction of that PIR sensor.. The sensors have side blinders to prevent false directional readings. I hope that the RCWL-0516 Microwave Proximity Sensor may help
Great Video - thanks. They are great units too, however, it is a pity that we cannot use the RADAR unit in the UK in 'products' as I believe it operates at 3.2GHz which is not licensable. (and yes, I find they interfear with each other) Thoughts anyone?
Hi, Bill thank you for another in depth video with excellent details, I know you were unsure about the esp8266-01 due to signal crossover with Wi-Fi. But would you consider giving it a go, to see if it works, as I want to make a door sensor to interface with IFTTT to indicate door action at my home. I think this would make a good project for others and with your knowledge perhaps it would help others including me. All the best, Bob.
As always a great video I want to make one for my front door, so I see that it works through plastic but does it work through glass as well. Thanks, Bob from the UK
Thank you for the video. One question … the first ones I do bought, only worked in 1 cm around, so I do bought another ones. The new ones worked well. I realised that the new ones have an 7133-1 regulator. What are the differences between ones with this regulator and the ones without it? Again thank you for your videos, they are very instructive 😃.
Thanks for an informative video - question I have is - how directional is the radar on the RCWL0516? Can one make it only detect in a narrow range as I am thinking of using it on a model railway layout and to trigger only when a train passes by ? - thanks
This entire channel is gold.
I hate it🤭 - cost me a lot of money😏
Can i mine it 🌝
Excellent tutorial and because of the clear language 100% understandable by non-native-speakers! Thank you so much.
Very good video, with lots of info & well delivered.
I wonder how this channel flew under my radar (pun intended) for so long.
Subscribed! 👍🏻
Now, I have a couple of things I'd like to point out if I may.
8:07 The circular thingy serves as a capacitor for the oscillator (high-frequency NPN transistor), not an antenna.
The antenna is at the other side, & it's a common transmit/receive antenna.
10:44 Although the LED pins are correct (anode = longer), the internal electrodes are wrong (anode = smaller, not bigger).
I'm pointing this out because I believe one should look at the internal electrodes to figure out polarity, instead of the external ones, since the latter can be cut.
& if people learn it wrong from this video, they may run into problems in the future.
20:02 I'd pull the button Pin to LOW, instead of HIGH, for two reasons.
- If you pull it HIGH, you're constantly sinking 0.5mA, regardless of the button's state.
Yes, that current is negligible in this circuit, but I believe it's important to adopt "good habits" anyway.
In the case of microcontrollers, taking their limited power capabilities into consideration is one of them.
- It feels more intuitive to "send a signal" to the Pin when the button is pressed, instead of "disrupting a signal".
I believe it's easier for less experienced tinkerers to understand too.
From what I've read (I haven't tried them myself, yet), those sensors don't interfere with other GHz devices (routers etc).
Apparently they don't interfere with each other either!
So using BT shields should work well too.
Always the best from DroneBot Workshop!!! I just received five RCWL-0516 modules from aliexpress with intentions of setting up security zones for my property , with this very helpful video I think this will be the start of something very interesting, thanks for the upload.
Just watched your tutorial and set up a new rcwl-0516 as I watched. I bought 20 and the 1st one I tested works very well. It's set up in front of the TV pointing back at me and it is very responsive and stable behavior too. Great channel and tutorial. Thanks!
BTW: I didn't mean pointing back at me. Maybe it's radiating in all directions.
Perfectly explained! Thank you.
I connected the sensor without Arduino to a "remote doorbell button". Battery operated, small size, can be placed wherever it suits. The bell then rings (or just the LED flashes) when someone enters the controlled zone. Works through walls and doors!
Thank you for this lesson. Works very good for me, I invest 35 minutes in watching your video and I remember it forever!
Thanks, Bill, I am impressed with your clear and professional presentation.
Wie immer ein Top-Video.Super und ausführlich erklärt - so sollte es sein.
Thank you for your very clear explanation of RCWL-0521 and its application for the detection of the moving object.
Hello !! I'm about to prepare myself in making an alarm for my workshop and garage, your video has been more than useful to my future project. Nice explainations and many details. Good Job, keep on instructing us !! Long life to your channel
Sir I am happy to see your tools set is kept. Neet and tidy. Very nice sir.
Many thanks ! After watching couple of your earlier workshops, I am practically hooked to it. Every day at least one workshop on my agenda
Sir You are Very good teacher & have very good Knowledge.
Thanks you very much for explaining in simple manner. Keep up teaching and good works.
Your teaching style is superb. Thank you.
Thank you very much for explaining everything in detail and for demonstrating the connections.
Vos vidéos sont très intéressantes et vos explications très claires, avec un réel souci de pédagogie.
En vous suivant, je m'améliore. Je vous remercie très sincèrement pour ce partage.
Extremely well explained and demonstrated. Very high quality content. Thanks a lot.
Always the best explanation
Sir, your videos are the best videos I ever saw.
As always, you explained things that is easy to understand with actual example and links to the codes, docs etc.. Keep up the good works. Thank you! New subs here!
So useful I bought some! Thank you. A good, concise video. I attached the output signal to an optocoupler relay module and the relay switches, so that's good! I've also found that if you keep moving around, the sensor is always active so the relay stays on E.G. running a light bulb, alarm etc. turns off once movement stops. would be good for a self contained alarm/light/ device on its own without needing an Arduino (or Picaxe in my case) so saving a few quid!!!! thank you again, You"ve got a new subscriber :-)
so I assume you had to use a high level trigger relay correct?
sadly all I have are low level triggered relays
Hi, this is the first time I've been here, I'm a retired electronics tech, Marines, not played with electronics much for twenty years, but collected some arduino oriented electronics, off ebay, and low and behold, here's how to use the very module I selected for a burglar/security alarm system for my home. Great teaching skills, very clear explanations, nice easy pace. I look forward to getting caught back up, at least as much as necessary. How did you know I bought that doppler radar device?
Very interesting and informative video. The RCWL-0516 is now on my list future projects. I also particularly appreciate the care and preparation put into the production, and the use of high quality video. Too often videos like this are made with low resolution video so that the code examples and diagrams are unreadable.
Sensational. Your video was really clearly explained with great diagrams and code too. Many thanks.
I think it's more appropriate to call this a motion sensor, or motion detection module. It has no capability to detect 'proximity'. Any stationary object in the sensors proximity will not be detectable nor can it determine the distance to an object's proximity.
Brilliant channel. Many thanks for your hard work. Love the clarity of your presentations.
Very useful , your videos are the basics of my electronics foundation sir. Thank you very much
Always learn so much from your videos... Thank you!
You make the best, most informative videos! Thank you
Excellent video! The speed of instruction is perfect for the average mind and the illustrations are precise and well-synced with the language. But why the dropping resistor? I built the circuit on a breadboard using a 3.3v LED to match the 3.3v level of the output pin. Also, LEDs come in varying voltage ratings; 3.3v being just one. I also want to try replacing the LED with a piezoelectric element to see if the output pin has enough grunt to drive it.
Dear Sir.
I would like to thank you for your detailed video.
Kind Regards.
Crystal clear. Thanks for sharing.
As always detailed and helpful. Thank you. Keep doing what you do best. Looking forward to the next project
Excellent! Waiting for my sensors to arrive. Practical discussion of using PIR or ultrasound vs this radar sensor (range, false positives, penetration of glass windows, etc) will be addressed in my own experiments. It would be nice if the sensor did not stay on for two seconds so it could be rotated and data collected in many directions in real time. Thanks for your great projects, well explained, as always.
There are other microwave sensors out there that just output the raw data but they seem to be more difficult to operated. As these are so cheap, you could use two or more pointing to different directions?
Thanks for the suggestion and clarification on available sensors - 3 sensors coming for just that reason.
Thanks for all your videos, especially this one. It made it much easier for me working with the RCWL-0516 doppler sensor and it's application. I'm new for this type of module sensors. Thank's again. Mr.G ( PS:I would like to know more abut your newsletter !)
Interesting video and love to see such work shop.
Beautifully explained. Thank you very much.
Great video. I am going to build this proximity sensor that sends data to my iobroker that is going to control other IoT devices in the room.
This is an amazing demo
Great stuff!..I bought some doppler modules, and was looking for a way to control their output for lighting a room.I need an arduino lol.. thanks for explaining in a great relaxed concise manner. Fantastic video :-)
Great Sir always trying to use modules to their full potential..Love from Pakistan
I love your videos, they are all so informative. Thx much.
You should have far more subscribers than you do, your videos are extremely good.
This video is so well done it is amazing. Thank you so much.
Hi all!
Thank you Bill for that video.
I have a problem with my chickens. They always come to my patio and make it dirty. My project is to create a forbidden zone. So, I experimenting with a system to chase them away. I plan to use the product shown in this video to pilot two perpendicular air jets. These streams should be oriented on each side like a barrier and start simultaneously when a bird approches. To synchronize the actions, I wonder if that way of proceeding is a relevant choice in terms of sensitivity and speed. If someone has an idea or an experience, I'm interested.
I look forward to reading you.
Thank you very much.
Philippe
I have leant a lot from your channel, Thank you veru much.
Thanks. Very clear. That's one incredibly fast train in the Doppler explanation. ;-)
Hi,
First I have to say that I really enjoy your instructional videos. You are one smart cookie. Keep em coming :)
Secondly, I purchased the RCWL-0156 sensor and wired it up, both on its own, and then to an UNO, as per your instructions. ( I have a fair bit of experience with Arduino, and everything related to it, so I am confident that I connected everything properly) . I used a 220 ohm resistor for the out pin to the led. My issue is that although the RCWL functions properly. (IE: The led lights up when the sensor senses movement), it only has a range of 2cm. It doesn't pick up anything further than that. I received 5 units in my order, and tested all of them, and they all have the same range (2cm).
Has anybody else experienced the same issue. Any ideas as to what could be wrong.
PS: I tested with 2 different power supplies, first the UNO, and then I hooked up my Korad KA3005D set first to 12 volts, then to 24 volts and 0.003 amps. The sensing range was the same for all tests.
Could it be a bad batch of sensors ?
Cheers,
T
Another great lesson. I am really looking forward to the robot build.
Hi thanks for the video as always an excellent instruction on how to use a product top marks thank you, Bob, from the UK
Excellent video. 90% of what i need to do in my project....
Good channel for teaching practical material thanks
Very clear explanation. Excellent job.
Thanks for this video, as usual very detailed and well presented. Really useful information.
I'm glad for this vid. I'm useing the 0516 with a GSM (A6) with a uno to make a alarm, I got the code for the 0516 right but to send a sms is a bit more difficult but getting there. I hope when I get to figure every thing out to make a video of what I did and also with the code but got to get the code for the sms right. But nice video
Gr8. Thanks for good explanation as always. Sir, as a common man, I thought, such sensor could be used to measure the distance.
Another side benefit of this circuit with remote is the microwaves knock out car key remotes , so if your car key is cloned no one can use it anyway cause the only way to open car is with key manually while the detector is running when you come back turn off microwave and you can open car again
Excelentemente explicado, gracias.
Thaks, even if I don't speak english well I love your video and your class.
Thank you very much, Bill.
Great video. I absouluty love watching your videos. It is like candy for my brain. :)
Impressive ! Good explanation
Very easy to learn type video. I like it so much thanks
great video! appreciate your work.
Exceptional video, thank you very much. I really appreciate your calm and comphrehensive style of presentation.
Very clear perfect video....thanks
Excelente señor. Excelente su video. Muchas gracias.
Ive used this to detect if my cats are outside my door.
Its hooked up to a transistor that turn on leds that light up a cat shaped 3dprinted figurine.
Been working fine outside for a couple of years now.
Why the comment about the safe use of microwaves when using this board? I don't understand. Aren't microwaves all over the place already? Nobody mentions safety when working with IR emitting devices. IR radiation is of both higher energy and absorbance by the body.
BTW...Great video!
Very nice explanation
The ldr-resistor example would be great for a war droid at night in sleep mode.Working on a turret right now.A few gesture sensors paintball gun and some high grade steppers systems.Converting some old solar panels to power it.
clear, informative, thank you
Allo and thank you very much for the great knowledge you share with us , my question about this microwave sensor is : Range ; is there a way to have a set range ,meaning ignore from X range and more but when movement is inside the set range then an action is taken ?
Thank you for all these excellent videos.
Can you do one on the LD2410C radar?
Tiny nit to pick; The dopper effect was not *discovered* by Doppler, Doppler was the best known source for a detailed description of the ffect. A bit like how Tesla is credited for inventing wireless power transmission even though induction and radio had been wel documented long before Tesla's grandparents where born.
When you explain the Doppler effect, you show the base frequency as 1000Hz and then 2000hz when object is approaching. Think about that for a moment, that can only be true when the frequency is doubled, or when the emitter is moving the same speed as the wave. Either Mach1 for sound or Warp1 for radio waves. But, how do you make sure the emitter isn't arriving at the observer Before the wave?
Typically, Doppler doesn't operate on such extreme multiples or fractions of the base frequency that you presented.
Excellent Video. Extremely informative. Sir can you please make a video on how to use an esp8266 with Arduino?
I just discovered this sensor last week, its very neat! I'm surprised its taken me this long to realize it exists as it seems to be a fantastic replacement to a conventional PIR sensor, and equal or better costwise as well. In fact now I'm wondering why anyone would use PIR when this is available. Can you (or anyone) breakdown any pros/cons between the two? So far it seems like a no brainer to go with this instead.
One corn i observed was this sensor is sensitive for motions beyond the walls or even doors so its not good if you are placing this on a wall to monitor motion within a particular room.
I like seeing different modules tested and used, it is a good way to get ideas.
Why do you believe it uses doubler effect? My guess is that it works the same way as ultrasonic movement sensors (Not distance measurement) and PIR detectors. That is you get some "DC" level depending on the environment, if anything moves in the environment this level will change. The chip will amplify these changes and if they are above a threshold trigger the output.
Another detail is your switch connection, why use a resistor? A single line in the program will make the resistor obsolete.
A comparison and more detailed explanation can be found in a video by Andreas Spiess at ua-cam.com/video/9WiJJgIi3W0/v-deo.html What you are referring to by "DC" level is the (processed) output of a sensor device. Radar, ultrasound and pir sensors each use a different physical phenomenon to obtain a measurement.
Regarding the resistor: the internal pull-up resistor inside the MCU(which is what you are referring to) is rather large and can vary between a relatively large range. It will be sufficient in most circumstances. However, if you have bad luck and have a MCU batch where the pullup's are rather big, the pull-up effect can be too weak in a noisy environment and cause false triggers. Therefore it is good practice to use an external and known resistor. That way, you can create more robust hardware and decrease its value for noisy environments. Often this is also combined with a small capacitor (e.g. 100nF) to suppress/filter any picked up high frequency noise.
since this rcwl-0516 can detect object from above, beneath, left and right, and how can one/the arduino knows
where the object is moving from ??? thanks for your time and your input and this tutorial;
Really good video. Thanks for sharing your knowledge. I have one question please. The object must be in front of the antenna or is it able to detect movement of objects that are not perpendicular to the antenna? Best regards from Valencia, east coast of Spain.
Excellent as always! What is the detection range?
Great Presentation!!!!
Interesting video as always.
Hello. Wery nice video. Good job. I like the wireing animations. Can you please tell me what program do you use for that. Thanks
Amazing Video
Keep it up
Good work, Le radio-Amateur peut vous confirmé que le 2.4Ghz ne sera pas interféré par le 3.18 Ghz et vice-versa. Les fréquences sont suffisamment éloigné l'une de l'autre sans être une harmonique.
Thanks, broad coverage. Excuse my ignorance, but how would it be possible to power a AC 230V light bulb without the Arduino, viz as standalone solution for LED as you described from 10:00, indeed AC relays require 5V DC and with RCWL-0516 the ouput is 3.3V.
Could you please make videos on how to code in the "C" Programming languages? You're an incredibly good teacher.
Great video Sir 👍. Keep it up.
Good video. I attempted to use one of these RCWL-0516 sensors with an ESP32 (client) configured to send the motion detected via ESP-NOW to another ESP32 (server). Unfortunately I’ve come across a small problem. The Wi-Fi function of the ESP32 causes false triggering of the RCWL-0516 if it is in close proximity to the ESP32. I don’t thinking it is the sending of the ESP-NOW messages causing the problem but when the ESP32 module comes out of deep sleep and the Wi-Fi initialises.
I have been making attempts with a great deal of failure due to PIR sensors instability . These PIR sensors seem to have a mind of their own going high for no reason. They all do the same even at minimal sensitivity settings. My Build design consists of one Servo motor to provide Panning .. Also four PIR sensors facing North, East, West and south. as each sensor goes HIGH the servo turns in the direction of that PIR sensor.. The sensors have side blinders to prevent false directional readings. I hope that the RCWL-0516 Microwave Proximity Sensor may help
Great Video - thanks. They are great units too, however, it is a pity that we cannot use the RADAR unit in the UK in 'products' as I believe it operates at 3.2GHz which is not licensable. (and yes, I find they interfear with each other) Thoughts anyone?
Hi, Bill thank you for another in depth video with excellent details, I know you were unsure about the esp8266-01 due to signal crossover with Wi-Fi.
But would you consider giving it a go, to see if it works, as I want to make a door sensor to interface with IFTTT to indicate door action at my home.
I think this would make a good project for others and with your knowledge perhaps it would help others including me. All the best, Bob.
As always a great video I want to make one for my front door, so I see that it works through plastic but does it work through glass as well. Thanks, Bob from the UK
Sure test it out and see. That's all part of the fun of it :)
Seems like a great device to detect Orchestral Manoeuvres In The Dark.
Thank you for the video. One question … the first ones I do bought, only worked in 1 cm around, so I do bought another ones. The new ones worked well. I realised that the new ones have an 7133-1 regulator. What are the differences between ones with this regulator and the ones without it? Again thank you for your videos, they are very instructive 😃.
Thanks for an informative video - question I have is - how directional is the radar on the RCWL0516? Can one make it only detect in a narrow range as I am thinking of using it on a model railway layout and to trigger only when a train passes by ? - thanks
Muchas Gracias..!! 😊