عادل
Reviewed in Saudi Arabia on January 24, 2025
شيئ جدا ولا انصح بشرائه
Adam
Reviewed in the United States on April 6, 2023
Wiring information is incorrect. Thought it might be faulty so I ordered another. Didn't work. Don't buy until they update the device info
Al Haz
Reviewed in the United States on February 10, 2020
Using it to count water meter gauge. Using MQTT on a ESP8266 with an 18k resistor between ground and signal. Has been working great for a week.
JohnM
Reviewed in the United States on September 1, 2019
I am attaching a screen capture with the correct wiring for the same product from a different company (KNACRO DC 5V E18-D80NK Infrared Photoelectric Switch). The wiring information provided in the questions for this product is not correct and as a result the product will not work when wired that way. Here is one user's comments for the KNACRO, which is the same as the HiLetgo listed here:Works well for an arduino project. Used this for a pellet stove hopper sensor. Just hook the brown to the phone charger/ 5v dc input. Use a 18k resistor between the ground and signal out to get the signal voltage to 3.3v. Signal out is the black wire and blue goes to the ground pin. This will make it so when the sensor path is blocked it will output a HIGH signal 3.3v and when it is not blocked it will sink the voltage and have a 0v output signal. Sensor also has an strength adjustment screw to adjust effective distance and an LED to know when the sensor is blocked.
Vending Import LLC
Reviewed in the United States on August 16, 2019
Great
Hawaii Customer
Reviewed in the United States on July 12, 2019
So accurate and perfect adjustments. This optic sensor spots moving and especially stationary objects. Great stuff!
ニャッキー
Reviewed in Japan on June 16, 2019
HC-SR501やLM393で10センチ程度の距離の人体検知を試していましたがうまく行かず、これにたどりつきました。一番いい感じで使えてます。ただ、距離調整つまみを回しても、思ったように調整できないのが少々残念。Arduino使わずにリレー出力できるので助かります。数ヶ月後に精度が落ちてこないことを祈ってます。
Rob
Reviewed in the United States on March 14, 2019
We used this in place of a $70 unit on our robot. Same mounting holes and plugs right into RoboRio.
William F.
Reviewed in the United States on December 24, 2019
These are awesome
J.R.
Reviewed in the United States on February 6, 2018
as described, and delivered on time