Questions tagged [hardware]

The physical circuitry and other components of a machine or device. This is distinct from the program code running on a device, which may be called software or firmware.

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16 views

Use arduino to cut off a hopper when load reached a limit

I am owner of a Departmental Store. I want to build a weighing machine with a hopper which will stop when the load in the packet reaches a certain value (For eg. 2 kg) Can arduino help me?
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38 views

How to plug a servomotor on an Arduino Nano Every?

I would like to plug a Metal Gears Analog Servo on an Arduino Nano Every (because this card is the cheapest one). I only worked with Arduino Uno in the past but Arduino Nano every don't have pins but ...
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110 views

What is the advantage of higher priced arduinos to cheaper ones? [closed]

I just got an Arduino Mega ADK (which seems to be functional, based on my limited testing and knowledge) at a yard sale for under $5. I don't have any Arduino experience, but I'm into DIYing, so who ...
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31 views

SIM7000E 0 voltage at SIM_VDD

I have problem with my SIM7000E. My PCB scheme and design is aveliable here https://easyeda.com/jaka87/new-vetercek While sending AT commands I get error as if sim card is not connected. I also put ...
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2answers
49 views

Arduino Nano randomly resetting

I am currently struggling with an intermittent problem with an Arduino project. Background I am using a LabVIEW program to control a few pieces of hardware. One of them is a NEMA 17 stepper motor that ...
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1answer
68 views

Recommendation for a projector module or approach?

I am looking to create a projector effect similar to one seen in projector alarm clocks like https://www.amazon.com/Mooas-White-Projection-Alarm-Projector/dp/B07Q6W53LK/ref=asc_df_B07Q6W53LK/?tag=...
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26 views

How can I power off a servo the best way? Problems with MG90S servo [duplicate]

I have a NodeMCU and im trying to control a servo to move from angle A to B and viceversa. The thing is I want to be able to power off the servo after moving so it could stop getting voltage and ...
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1answer
136 views

I want to create 10 levels with one button but this code shows only level 1?

#include <Adafruit_NeoPixel.h> const int PIN = 4; const int NUMPIXELS = 10; const int BUTTONPIN = 6; int buttonState = 0; int PINState = 0; int level = 1; int dt = 100; Adafruit_NeoPixel pixels(...
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1answer
127 views

Reverse engineering LIN bus on E-bike system

As a project I am trying to 'hack' an old E-bike. The electronic system of the bike consists of: A torque sensor measuring deformation of the rear. A 'spin' sensor measuring if the person is pedeling....
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1answer
203 views

Real Time clock module error-DS3231

This is not a code error I have been using DS3231 RTC module with battery. When I bought this module It worked perfectly now when I get it to use, The time is running perfectly. when I set the current ...
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1answer
49 views

How to find out if HX711(amplifier and 24-bit ADC) is damaged or not?

I'm using this ADC with a load cell for weight measurement, I had 4 strain gauges and mounted them on a cantilever structure that I made out of acrylic sheet, used calibration program from here: https:...
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74 views

Trouble programming custom ATMEGA2560 board

I need some help. I copied the heart of MEGA2560 design into a new project. I have the new PCBs with blank MCUs and now I need to get things programmed. (I have an existing project that runs on a ...
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APDS-9960 detected but not showing output on serial monitor

I just bought an APDS-9960 sensor yesterday and tried it out today using Sparkfun's example from its APDS-9960 lib, and the only thing it printed out was: "SparkFun APDS-9960 - ProximitySensor&...
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Adeept Arduino Mega 2560 isn't recognized

So recently, I purchased an Arduino Mega 2560 Kit from Amazon, which was customized from this company called Adeept. But when I tried to plug it into my computer, it didn't recognize it. This means my ...
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62 views

How to Adjust MQ131 Sensor?

The problem Hey. I'm trying to use the sensor Mq131 to measure some ozone data in a closed environment, but I'm having some bad time to adjust the trim in the sensor and get results in ppb. By ...
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192 views

I need an example of how to send AT COMMANDS to SIm7000E GPS+LTE module from ESP32 and reading those response in Serial monitor

Actually I need to make HTTPS post request using SIM7000 and ESP32 but the available libraries don't have a function for HTTPS post request, I wanna make this request using AT Commands. I need a ...
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1answer
285 views

Running hardware interrupt function on NodeMCU ESP8266, Exception(0) after four iterations, can't disarm interupt function

I've been trying to test the stability and consistency of hardware interrupts on my NodeMCU ESP8266. I'm using the Arduino IDE. This sketch should not require any external circuitry and I think, but ...
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1answer
47 views

How To Activate H-Bridge?

My understanding of the H-bridge is, that activating in1 or in2 will direct the 12V current to the motor, so it either spins right/left. Not that in1 or in2 is the actual current passing through to ...
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49 views

HC-05 Stuck in slave loop mode (loopback)

got my HC-05 today and accidently set the AT+ROLE=2(slave loop) and now I can't get out of it! Anything I send it just resends it back to me, even commands like AT+RESET and AT+ORGL, they just get ...
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2answers
91 views

Hardware/software serial for HC-05

can anyone please tell me the whole difference between hardware and software serial for the HC-05. I read UART,USB cable, serial and I was like really confused so what is the difference and advantages ...
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79 views

how to implement AES in LoRa Module with Hardware Flow control using ESP8266?

I am working on project where I have to do AES encryption of plain text received through normal UART port of ESP8266 create a cipher text and sending it to LoRa module (EByte E32 868T30D) through ...
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1answer
93 views

HTU21 on GY-21 breakout board I2C problem

I am interfacing the HTU21D sensor with my nodeMCU v3. All good! I managed to get some readings etc. But when I re-upload my code the device does not respond. If I remove the power supply from the pin ...
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1answer
55 views

How can I understand which arduino I need to run some code?

I want to build this project (but any other project would give me the same uncertainty): https://github.com/ltpitt/arduino-n64-controller-library But I cannot understand which arduino I can buy that ...
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1answer
99 views

Why are my motors attached to an Arduino MEGA not running?

I verified my code and uploaded it to the board and that was successful. Info: - Using Mega 2560 Arduino Board with Adafruit V1 - 3 DC 12 volt motors - on HP computer Here is my code: #...
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1answer
261 views

Problem to Setting up i2c OLED wemos D1 mini shiled (64*24)

Hi I used this shield before well. But it didn't work when I wanted to work with him last night! this is my wireing : Now I want to know how to test that it is healthy? Is i2c address missing or ...
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1answer
92 views

Powering Arduino MEGA 2560 safely without computer [closed]

How can I safely power my Arduino MEGA 2560 and have it run programs without being connected to my computer? If I am actually able to do so I assume that means it needs a new external power source, ...
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2answers
101 views

How can I upload a sketch remotely from a distant location onto an arduino that is power by a battery

Of course after developing a success full embedded product the next step would be making upgrades to compete favorably with new products in the market. Well making upgrades would require making ...
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2answers
103 views

Is there some hardware that can be used to upload sketch source code via USB flash disk (Automatically By plugging it in)

Well am asking this basically to know if it is possible to create a bootable flash drive that automatically uploads any source code onto the arduino just like creating a bootable flash drive when ...
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47 views

Arduino Due 9-bit serial - Can core Due Libraries be modified to get this functionality similar to Mega and Uno?

Need help to see if I can get an Arduino due to receive and send 9-bit com as already implemented on AVRs like Uno, Mega and even teensy boards, by modifying hardware serial cores. Have not found any ...
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237 views

ESP8266 Loop cycle frequency gets decreased after WiFi got disabled

In a traditional scenario, after the setup() method we go to the loop() method of our sketch. You know, usually it gets executed probably 5-10 times in a second (or even more). I am now playing ...
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2answers
1k views

Is the LGT8F328P legal?

Since some months, everyone can buy a board with this IC. It is compatible with the ATMega328 and has some features like 12bit ADC (instead of 10 bit), DAC, unique ID and also 32MHz. But I can't ...
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4answers
479 views

Program Arduino then Remove Atmega?

Can I program an Arduino and then remove the micro-controller from it and use it on a breadboard without reprogramming the micro-controller again? My steps would be: create my Arduino code. I upload ...
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25 views

Having problems with Lilypad [duplicate]

So I recently bought a Lilypad and a Prolific PL-2303HX which I only discovered when connecting it to the computer has phased out since 2012. I found a video online which shows the solution was to ...
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3answers
30 views

Help me get my robotic car to work?

So I recently followed a tutorial on youtube and I've assembled the car and connected all the wires. What I've done: Car Now in the video, when the guy connects all the wires, the wheels constantly ...
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1answer
210 views

Connecting MPU6050 to Arduino Lilypad

To preface, I am very new to Arduino and I watched this video on YouTube. It shows how you can build a motion controlled car with Arduino and I decided to make this for my school project. One thing ...
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63 views

What can cause an Arduino to “disconnect” from Windows?

I bought a DFrobot Beetle and it worked fine for probably an hour, then it just stopped working with Windows. When I connect it to the computer I hear the "connect" sound, then within 5-7 seconds I ...
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1answer
45 views

What hardware do I use to detect an electric current going to a lightbulb and tell if it is turning on and off [closed]

I’m doing a project where you have to detect a lightbulb coming on through the electrical current and was wondering what Hardware and what the program is? Can y’all help? Very much appreciated if y’...
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1answer
142 views

MOSFET dimmer IR controlled

I am trying to make a group of LED dim with PWM to a MOSFET. The code seems to work for this, but the trouble is that the IR receiver will only receive the signal to turn on the lights and then IR ...
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1answer
162 views

No Data Received on Serial Port & Unable to DFU Reset. Advice?

Having a problem running my original code that I tested last week, which worked on multiple days last week. I tried to do a DFU reset and update the BootLoader, but it didn't work. I checked the ...
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2answers
3k views

Which kind of diodes I should use in buttons/keys matrix input? (Making gaming keyboard)

When making matrix input of NxM columns/rows with push buttons, there should be a diode next to each button to prevent "ghosting" and able read many keys pressed together correctly. There is a lot of ...
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1answer
169 views

AC Voltage Sensing using Arduino Uno

Is it possible to sense AC Voltage using analog input for Arduino Uno or can it only read DC? I mean I've tried connecting an AC voltage source to analog and I'm reading some numbers. However, I don'...
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2answers
111 views

Using 8bit ports as 8bit I/O variable (while using USB,I2C, SPI and Serial) - keyboard

I am seeking HW. I would like to make keyboard with enhanced functions (RGB backlite, macros, programmed profiles etc) driven by some small MCU (Arduino Micro Pro or something similar). To support ...
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2answers
60 views

Load Resistor Use for Voltage Sensing by Arduino

I connected a piezoelectric film to a Arduino Uno board via analog input. However, as I was getting very high voltage values (reaching 5 volts without much movement). Therefore, I added a 1 megaohm ...
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3answers
629 views

Is there an alternative to soldering to connect boards?

I know that shields are usually soldered to headers so they can be attached to the board with the Arduino. I have a tremor, which makes soldering impossible. Are there ways of connecting PCBs without ...
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1answer
282 views

Arduino Hardware serial pins with RS485

I tried asking a question in my earlier post - SerialEvent with RS485 communication it helped me understand Hardware serial and Software serial but i had few more questions for which i started this ...
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0answers
2k views

Change the mac address on an HC-05

So I tried to save a little money and bought (5) HC-05 bluetooth modules off of our good buddy eBay. When the modules arrived, as I was testing and setting up for my project (2 nano's connected via ...
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1answer
272 views

Motor isnt spinning when using L298N motor controller

I have a L298 motor controller connected to a motor with a 6 volt power sources. the motor however isn't spinning any ideas I'm using a esp 8266 node mcu board. I would like to use pwm but for right ...
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3answers
1k views

Esp8266 Vin pin

I've read that Vin pin is directly connected to usb cable in esp8266 (which is 5V). I wonder if I can power a relay 5V and a servo motor Sg90 with this pin? And is there any danger of doing that ?
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1answer
84 views

Can I put a resistor in the ground connection of my DHT22 sensor?

I'm building a project that uses a couple of Adafruit DTH22 temp/humidity sensors. (https://www.adafruit.com/product/385) I have them wired into my project box through 3.5mm mini plugs (The kind that ...
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3answers
86 views

Can I use Arduino for my purpose? [closed]

I am trying to make an agv (automated guided vehicle) that will be line following, will have obstacle detection along with dragging 200 kg of weight in drums with wheels. My project is for industrial ...

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