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Features:
The trigger mode of these mini human sensor modules:
After high sensing output, during the delay time, if a human body is active within its sensing range, its output will keep high until the delay after the people leaves, then it will become low.
The human sensor module will prolong a delay time cycle automatically after detecting every activity of the human body, and the time of the next activity is applied as the starting point for the delay time.
Specifications:
Product model: AM312
Working voltage: direct current 2.7V - 12V
Static power consumption: Delay time: 2 seconds
Blocking time: 2 seconds
Trigger mode: repeatable
Sensing range: less than or equal to 100 degrees cone angle, 3 - 5 m (depend on the specific lens)
Working temperature: -20 degrees Celsius to +60 degrees Celsius
PCB size: approx. 10 x 8 mm/ 0.39 x 0.31 inch
Total size: approx. 25 x 12 x 12 mm/ 0.98 x 0.47 x 0.47 inch
Package includes:
10 x Mini human sensor modules
Notes:
Please keep away from little kids.
Manual measurement, please allow slight errors on size.
daniel b houle
Reviewed in the United States on August 3, 2024
The small profile makes this easy to add to any project that needs PIR sensors.
Louis LaBrunda
Reviewed in the United States on October 11, 2024
Great price. Works well with my Raspberry Pi.
joseph gibbs
Reviewed in the United States on March 30, 2023
love the size
Justin Snyder
Reviewed in the United States on March 13, 2022
I assembled these into small enclosures with an esp32 running ESPresense, and the results are terrible. I have 2 of them that work well, the rest are being triggered from the low amount of heat that the ESP32 is putting off. If I remove them from the enclosure, they seem to work OK, but they're completely unusable to me. If you're going to use these things, either plan on getting a large enough enclosure that it will not be anywhere near your controller, or plan on wrapping everything in electric tape and keep them separated!
Roger johnston
Reviewed in the United States on June 3, 2021
So these little things output 3.3 volts when there's motion detected... wait a minute... No no not when motions detected! These aren't motion detectors! They detect hot things like a cup of coffee or when the surrounding temperature is not the Arizona desert where I'm at I'm sure they would detect people just fine... When it's 101° outside they don't really work too good. By the way it's 3.3 volts for hi-state output and the current out is "you better have some FET input amplifier cuz these things can't drive crap". So whether you have 12 volts on it or 5 volts on it the output high is 3.3 volts. To be used in cooler environments as well. And this remembrance of previous times for the on state or high output is BS.
asb2106
Reviewed in the United States on February 21, 2021
Excellent mounting ability. Simple press fit and they hold nicely. The plastic mount also comes apart in three pieces allowing for easy mounting when the wires are soldered up. Leads come out pretty easy to solder up my own wires. Makes it even more compact! They are very directional. 501 sensors that I used to use had a little better width range, but distance is comparable with these guys running on esp12fs reporting to home assistant through esphome. They’re excellent. Buy them you won’t regret it.
Chris Pungo
Reviewed in the United States on January 22, 2021
I really needed these to work on a project I had to finish and it was exactly what I needed.
Joel Styer
Reviewed in the United States on April 9, 2021
9 of the 10 work very well. The 10th one is different but does work. Most of them have an on period of about 1 second minimum (measured 950mS to 1.2 S), number 10 is about 2.5 seconds. Sensitivity seems good on all axes. The plane along the circuit board may be a bit more sensitive but just marginally in close tests. The blocking time is around 2 seconds (except for #10 which is about 5 seconds).The output with no load drive high to about 3V during detection. Note that this output cannot tolerate much loading at all, even a 10K resistor to ground will drop the output to near 2V. I plan to drive a 2N7000 MOSFET to buffer the signal. An NPN transistor with a 10K base resistor will also work but not quite ideally. I did not test power consumption or for false triggers yet.Overall, I am fairly pleased except that I wish the tenth one was as consistent as the rest.
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