Electrical Engineering

Questions tagged [hc-sr04]

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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 ...
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56 views

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 ...
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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 ...
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235 views

HC-SR04 Distance Sensor Trigger Signal on 2.5V 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 3V (Nominal) voltage Coin Cell. The HC-SR04 is ...
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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 ...
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2answers
105 views

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) ...
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809 views

Can I interconnect all echo pins from multiple ultrasonic sensors?

I want to use (probably) four ultrasonic sensors HC-SR04. These use a trigger pin and echo pin. For the echo pins, I want to connect them to a timer with 'Combined Channels PWM Input on CH1', and the ...
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HC-SR04 with STM32 gives unexpected values

On an Arduino it is easy to get an HC-SR04 ultrasonic sensor getting to work. However, on my STM32(F103C8T6) I get strange values. I assumed I connect it correctly, since I get values on the trigger ...