Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [hc-sr04]

17 questions
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4 answers

What is the purpose of this extra capacitor in this opamp low pass filter?

I'm trying to follow along with this blog post reverse engineering the HC-SR04 ultrasonic distance sensor. The signal from the receiving transducer is amplified, filtered, and then amplified again. On the filter, there is a 1 nF cap C4 between the…
user364952
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Is it possible to make an LED turn on with an HC-SR04 without using an arduino? Only when an object is near it?

I don't know anything about coding so I wish to achieve this effect without a help of an arduino. I'm trying to minimize as much power as possible and trying to achieve the HC-SR04 sensor to sense anything up to 10-14ft to trigger the LED to turn…
Dean Sammels
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Why can't the HC-SR04 sensor detect objects that are very close to it?

I am following this worksheet and I am struggling to understand the following piece of code: # Stop when the Echo pin is no longer high - the end time while GPIO.input(pinEcho) == 1: StopTime = time.time() # If the…
a_sid
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How do I cutoff power to ultrasonic HC-SR06 when it is not been used, to save power

I want to read an ultrasonic sensor data every 10 minutes and expect that the module should be turned off in order to save power. How do I do this? I tried with a BC547 and PN2222 transistor but I end up with failure. Can you please suggest a better…
Manu Devappa
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HC-SR04 distance sensor trigger signal on 2.5 V voltage level gives no reading

I am using an Arduino on a breadboard setup with an ATMEGA328p MCU. The whole circuit is designed to work in a low-power state and is powered using a 3 V (nominal) Coin Cell. The HC-SR04 is getting a stable power supply of 5 V from another source…
Marry35
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How does the circuit for the HC-SR04 ultrasonic sensor work?

I already understand that the HC-SR04 ultrasonic sensor sends out a pulse and can be used to measure distance with the time of the echo. I want to know more about the actual physical construction of the sensor's circuit and how it works. I basically…
Jane Doe
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Proteus Simulation Error With 555 and HCSR04

Hello internet, I stuck at some point while simulating my circuit. This is a circuit that will measure distance and display it on seven segment displays. Firstly, When I tried to simulate this circuit I'm getting these errors; [SPICE] Gmin step [0…
Robottur
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How to do a pulse generator whose pulse width is controlled by a voltage measured in proteus without using a microcontroller or an analog circuit?

how are you?. I'm trying to emulate the behavior of the HC-SR04 distance sensor in proteus but using variables. I succesfully could make a simulation of a water tank whose level is indicating by the voltage of a capacitor and I want that voltage as…
vram
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Ultrasonic sensor not detecting any values when using Arduino and LabVIEW

I have connected the circuit as shown. The circuit works perfectly when I Use the Arduino ide. When I use LabVIEW, the distance from the ultrasonic sensor is always zero. The LabVIEW circuit diagram is shown. The Arduino ide code is shown below. …
Alex Mwaura
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HCSR04 with PIC18f24k22 stuck in real test

I have a problem with HCSR04 ultrasonic distance sensor. I wrote a code that works perfectly in Proteus simulator but when I upload it in real microchip it stop working properly. Looks like it sticks at one while loop and never get a echo signal.…
proestpa
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Functional block digram of a HC-SR04?

Can anyone illustrate a functional block diagram of a HC-SR04 ultrasonic sensor? I understand how it works when it comes to the application but I would like to know how it works fundamentally as a system.
BroomHilda
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Arduino DC Motors Not Working Correctly With The Servo

I m building a simple obstacle avoidance robot. Here I Typed the code. But there is a bug I cannot find . The Motors are not working properly when they intergrated as whole. when I check the codes and run separatly it runs the dc motor smoothly.…
Shakthi Sachintha
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Ultrasonic module Water proof vs non-water proof types

Ranging SR04 Ultrasonic modules are available as water proof and non-water types. In the water proof types SR04 modules there is only 1 sensor while in the non-water proof types SR04 there are 2 sensors, 1 as transmitter 1 as receiver. How does…
alt-rose
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Dummy Ultrasonic Transducer

I have several HC-SR04 modules which I wish to modify. There are two modifications in particular I want to ask about First, I am going to use two modules in parallel to determine location as opposed to distance. I’ve seen a project where two modules…
djsfantasi
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HC-SR04 Ultrasonic sensor below a grid plate

I want to use the ultrasonic sensor under a metal grid plate like below (just 1 of those plates instead of 3). The sender/receiver will be under (partly inside) two adjecent holes (hopefully it fits) and point upwards. The reason is to detect if…
Michel Keijzers
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