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Your cart is empty.Product Description
Applications:
* Security Products
* the human body sensors toys
* the human body sensor lighting industrial automation and control, etc
Use:
It can automatically and quickly open various types of incandescent, fluorescent lamps, buzzer, automatic doors, electric fans,automatic washing machine and dryer Machines and other devices,is a hightech products.
Especially suitable for enterprises, hotels, shopping malls, warehouses and family aisles, corridors and other sensitive Sense of region, or for the security zone automatic lighting, lighting and alarm systems.
Package Included:
5 X HC-SR501 PIR Infared Sensor
NOTE:
On this retrigger jumper is a solder jumper, and you need solder it by yourself.
HC-SR501 PIR Sensor Sensitivity and Time Delay is adjustable
There are two potentiometers onboard.
One is to adjust the sensitivity, and the other is to adjust delay time.
Also there are two trigger mode. One is Single trigger mode, which means that delay is started immediately upton detecting motion, and continued detection is blocked. The other is Repeatable trigger mode, timely delay is re-started every time motion is detected.
Rob
2025-09-03 10:04:44
Hooked the VCC and ground to a 12v A/C adapter and it worked perfect. The 3.3v "trigger" pin (the "OUT") even had enough juice to directly power a red LED (tho a little dimmer than normal). Very wide sensitivity pattern. Tho description says "At default sensitivity it would trigger easily from 8-10' away. I never adjusted it as that was the perfect distance for my needs.Holding it with the sensor "dome" facing down and the adjusting (orange) "screws" facing you, the left one is the sensitivity, the right is the duration that the OUT pin will stay "on" (i.e. hold at 3.3v). Minimum seems to be around 4 seconds.
Adam
2025-06-19 13:19:45
This product is perfect, and I love that it has a delay. I can wire this up to a board as-is without building a delay circuit myself. I've been using one continuously for a few weeks, and it's very responsive with a nice range. It has pretty good depth, but I haven't tried to press it. It can spot motion across an entire (average) room easily. I have projects lined up for the other ones included in this pack, and if I need more, this is where I'll get them.
Handy Forms
2025-05-28 18:07:59
This is probably the most common PIR sensor available. It's easy to use, and quite sensitive. But before you build your project around one, I suggest you set up a test to see whether they are reliably reporting detection or perhaps over-reporting. Of the 5 purchased, 2 of them consistently reported people that just weren't there (or perhaps reported ghosts?). Setting all 5 to maximum sensitivity, first I tested to be sure that all 5 detected motion - they did. Then I aimed them at a wall and let them report hourly detections all night with no one around. One reported an average of 45 detections per hour, another saw about 15, and the other 3 reported zero. Apparently 2 have a more vivid imagination than the others. So, 2 went in the trash and 3 are usable. I guess at about 2 bucks apiece, 3 out of 5 shouldn't be a surprise. I would give 5 stars to the 3 good ones, and 1 star to the other 2, for an average of 3.4 -- but feeling generous and considering the low cost, I rounded up to 4.
CJ Water-Stats
2025-04-27 13:44:29
These are great for turning the screen off and on, in my controller box.
christopher laut
2025-04-19 12:56:31
perfect just what i needed
Unikia Wright
2025-03-17 13:19:12
Was intact and serves well in my project long lasting too.
Plutarch
2025-01-10 16:41:50
I have built motion sensors with ESP8266 (Wemos) units in a small project box before and some of these I have running for years. I purchased these to build some more sensors. However these give me false positives all the time. It happens sometimes you have a bad unit, but after trying a few it seems these all suffer from the same issue. Out of return window, so wasted my money on these.
Gee Bees
2024-11-25 13:14:33
I'm providing a middle rating because documentation is not good.I don't know if I misread the specs when I purchased but I thought these PIR sensors would work with 3.3v input/source voltage and output 0v low and 3.3v High on output.I now know that they certainly need 5v source input voltage and output 3.3v.When I provided 3.3v input power they acted erratically and would not go predictably low. Using 5v input the 3.3v output consistently dropped low to 0v.In Summary: 5v In = consistent 3.3v out when triggered, and 0v when clear/not triggered.
A Bastien
2024-11-23 18:29:55
These are useless as motion detectors due to the false reports. Yes I tried the pF capacitor from Signal to Ground and I shortened the signal wire. It did reduce the false motions but they still happen few minutes. Unfortunately I can't send them back due to adding the capacitor to the circuit. I would not recommend these to anyone. I will try to keep fussing with them. I am trying now on a Wemos D1 Mini with less than 1 cm of signal wire from PIR to data pin.UPDATE: Still bad on the wemos with I've ordered a different type. Hope they work.
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