CQRobot Ocean: 10.525GHz Doppler Effect Microwave Motion Sensor Compatible with Raspberry Pi and Arduino Board. for Industrial, Measurement, Automatic Doors, Sensor Lights, Reversing Radar, etc.

Radar in the sensor i have received is set to 10.525GHz which is illegal to be used in the UK (should be 10.587 GHz or 10.687 GHz).

The CQRobot Microwave sensor is a credit card sized PCB Circuit board which features a large squaremetallic microwave sensor which takes up about a 1/3 of the entire board. This sensor emits10.525GHz microwaves (not harmful to humans due to its low range frequency!), which when theybounce off a moving object, go back to the sensor. These signals become amplified through squarewave modulation.In all, the product was very quick to hook up and set up and running in a simple test state. I wasactually using this as a hat to a raspberry pi 3, and by virtue that the three cable connectors forpower and sensors output all come with pin connector ends made this very easy to plug and play.The hat has a red power light which comes on as soon as it is plugged into your power source (5vusing my Rasp Pi), and a yellow LED light which turns on when it detects movement. At the bottomof the hat is a sensitivity setting, which requires a very small screwdriver.The sensitivity on the sensor was excellent. Even setting the sensor to extend to a range 1m beyonda brick wall in my house, it was still able to detect movement through the otherside of the wall! Assuch, if you plan on using this product indoors then you need to ensure that you configure thiscorrectly in order to not capture outdoor movement and vice versa.The only downside to the product was really around the support information on the wiki page forthe raspberry pi usage. A very short code section was given which if you are a novice to coding inpython, would be quite a challenge to know how to use and implement.

The title here says most of what I want to say I think. I've played fairly extensively with the smaller ones you can buy which are a lot smaller but they seem to be functionally identical with the exception of this adjustable tolerance thing, or at least that's what it appears to be, in the absence of any instructions.Using this is the same as the others, three pins, nothing tricky. I've never found any microwave sensors that can give you granular data - I assume this is down to how they work, unlike sonic sensors that give out distance info, this is, like all the rest, just "yes or no" to the question is there something there.They do work scarily well though.

This is a great little kit that is simple to use and has a huge range of practical uses. It comes in a plastic hardcase which offers great protecting during shipping. There is no physical manual but a link to the website is provided.I have set this up as a motion sensor to detect pets entering my computer room late at night when I am playing in the dark. It flashes an led array I have next to my pc. Much better than being terrified by a creature jumping onto the desk in front of you during a playthrough of Outlast.The sensor itself works flawlessly, and took less than half an hour to have set up correctly to reliably detect the moggy motion.Overall this is a great little sensor and I can recommend it to anyone wanting up ‘upgrade’ from a basic IR device.

This is a great module for prototyping with arduino or raspberry pi. it accepts 3V and 5V power via a switch on the side and the sensitivity range is very usable. I plan to implement this in an intrusion detection system in future. The built in LED allows a quick visualisation of the detection status. It may not be obvious to everyone, but the shield is at the rear, the sensor area is the yellow PCB in front.

In short:Very well-made bit of kit that provides users with an alternative to the usual IR-type detection.In detail:First of all, the sensor arrived in perfect condition mainly because this manufacturer uses proper plastic cases for the kit rather than rely on a jiffy bag. Wish more would do this.No manual in box, you visit the site - cqrobot.com or cqrobot.wiki.Battery power is recommended, with 2 cables for 5v power (and a third for the signal). Again, a nice touch - velcro cable tie included.Detection range is between 2m and 16m, controlled by a small but robust potentiometer, allowing you to select the exact trigger point.Two LEDs indicate power (red) and movement detection (yellow). A small switch is provided to change the supply voltage from 5v to 3v.I was tempted to deduct 1-star because it would have been nice to be able to adjust this via software, but for most people once in place there is no need to adjust from the original setting.Most people seem to head for IR when needing a movement sensor, but Doppler modules like these avoid any of the usual false positives or failures due to high temperatures.Just remember that you will need some programming knowledge to use this, but the company provide lots of info on their site.Overall a good bit of kit to use with Arduino or RaspberryPi projects, at a competitive price. In particular, worth stressing that the build quality is very good indeed - no dicey soldering etc. going on.