Questions tagged [ultrasonics]

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How to get an angle from two ultrasonic sensors

I am building a chair for a special 4 year-old with cerebral palsy, I thought it would be a good idea to add two distance sensors on each arm of the chair to measure the angle at which he presses ...
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0answers
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sro4m-2 waterproof ultrasonic sensor

I bought this waterproof ultrasonic sensor about 5 of them with the part number SR04M-2 Written on the PCB silkscreen Which is different from the usual SR04t-0.2, they are just not working, I don't ...
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25 views

Whatever components we connect to the Arduino, their grounds and 5v pin connection must be the same?

I am trying to connect different types of sensors & motors to the Arduino should I make their grounds and 5v pins on the same connection.
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UltraSonic Sensor wirh ESP-01 Standalone

I'm trying to build a cheap device to measure water level in a tank using HC-SR04 sensor and ESP-01 which send the data to MQTT topic. I used the same code with ESP-E12 which works just fine. As I'm ...
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0answers
24 views

Data Fluctuation with AJ-SR04M Sensor

I'm working on water level detector using lolin nodemcu v3 and AJ-SR04M Sensor, a water proof ultrasonic sensor. It is working fine at close distance less than one meter or so. However for long ...
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1answer
37 views

working with ultrasonic sensors

I have a little problem dealing with ultrasonic sensor I want a simple thing , when the sensor read High pulse then after it low pulse , turns on the led so I try to make it with a 5cm distance and a ...
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2answers
47 views

Is an Ultrasonic Sensor or Infrared Sensor better for measuring distance (to/from a human body)?

I'm trying to make a sensor to detect that a person is within 50cm to trigger a function. But when I use the HR-SR04 sensor, it works accurately on flat surfaces (e.g. walls, books) with a margin of ...