Questions tagged [hc-sr04]
For questions about the HC-SR04 ultrasonic ranging sensor.
78 questions
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Ultrasonic sensor showing random readings
I am using a HC-SR04 ultrasonic sensor to measure the distance using an Arduino Uno. When I run this code which is worked perfectly in the previous, it only shows just random readings in the serial ...
- 13
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A doubt concerning HC-sr04 mechanism of measurement
I'm trying to understand how HC-SR04 sensor works. I looked for detailed explanations online and read datasheets, but I still have a detail I don't get.
If I understood correctly how the "trigger&...
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138
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Problem adding IR receiver to smart car
I’m making a smart car using an arduino uno, sensor shield v5, motor control with a L298N and a servo motor + HC-SR04 ultrasound sensor. I want to add a IR receiver on the board so I can also control ...
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How to drive two Stepper motors and use an Ultrasonic sensor together?
I am working on an autonomous robot using two 4-pin stepper motors, HC-SR04 ultrasonic sensor, 2 L298N motor drivers (one for each motor), and an Arduino Uno. My problem is that when I use the stepper ...
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It is required to turn on the LED if the distance to the object is less than or equal to 200 centimeters. Find the error in the code
int trigPin = 10;
const int echoPin = 8;
int led = 7;
const int distance = 200;
void setup()
{
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
pinMode(led, OUTPUT);
}
void loop()
{
...
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208
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Problems using HC-SR04 with LED displays
I'm having problems using an HC-SR04 ultrasonic sensor in conjunction with an LED display module. The sensor appears to work fine when outputting values to the serial monitor, measuring distances up ...
- 111
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139
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Ways to detect if a ball has reached the wall?
I'm building a kind of pin ball machine, and I need to detect when the ball has hit the wall with the sensor attached.
The ball will hit the wall with a small impact, not large enough to push a button ...
- 111
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781
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Limit on connector cable for HC-SR04 ultrasonic sensor
Is there a limit for the connector distance between an arduino and a HC-SR04 ultrasonic sensor?
I have a set-up for measuring a liquid's level in a tank. The benchtop version worked OK, but when I ...
- 103
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60
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Problem regarding on HC-SR04 sonar with an additional stepper and SG90 servo motor
I'm making a project based on HC-SR04 ultrasonic sensor with a stepper motor and an SG90 servo motor. I have done some conditions for my stepper motor that is given below. Now I want to include my ...
- 11
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How to use HC-SR04 sensor to make a flowmeter?
I am somewhat familiar with Arduino and am trying to use two ultrasonic HC-SR04 modules to measure the direction of water flow inside a pipe. The sensors are kept as in the image below.
The direction ...
- 33
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What is wrong with my code? (HC-SR04 using 433 mhz module);
I asked a question about this last time but I still couldn't make it work but it somehow gave me an overview about my project. Now I've created an another project that is similar to the last one, the ...
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194
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How do I get sensor values using transmitter and receiver?
I used an HC-SR04 sensor and connected it to an Arduino board (BOARD1) with a 433 MHz transmitter, and the other board (BOARD2) is connected to the 433 MHz receiver. I don't know how to see the sensor ...
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263
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How do you count objects (using ultrasonic sensor HCSR04) as 1, after they leave the trigger/echo path?
I found a simple code online that meets my goal to almost 100%, however when I place my hand in front of it, the number continues to count. I am trying to only count "1" when the solid ...
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Ultrasonic HC-SR04
Having trouble with arduino
Ultrasonic Sensor Module
HC-SR04
I'm sure when you read this you're going to say how stupid can he be and you're probably right but I'm 82 years old and I'm trying very ...
1
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0
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411
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ESP-01 and HC-SR04 problems booting up
I have a problem in a project that I am working, basically I need to use a ESP-01 to receive the measurements from a HC-SR04 and send it to another ESP-01 (which I won't cover here).
Basically my ESP ...
