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.
255
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Arduino and custom pcb
I am looking to minimize the size and assembly complexity of my arduino projects. Is there any easy way to integrate something like an esp8266 onto my own pcb. I don't want to have to solder it on. In ...
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atmega328 custom board unable to upload code after bootloader is installed [duplicate]
I have a custom Arduino board with the atmega328 chip onboard. I am able to install the bootloader perfectly fine by connecting the mosi, miso, sck and reset pins onto an arduino uno, and then running ...
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Sampling rate for Adafruit LSM6DSOX and Arduino MKR WIFI 1010
Please let me know if this post has the wrong tags, I will make sure to change it.
My goal is to get the highest sampling rate possible from the Adafruit LSM6DSOX (6667Hz) using the Arduino MKR WIFI ...
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0
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LCD Wiki screen (ILI9341) works on Mega. How to get it working on the Due?
I have this exact LCD shield: http://www.lcdwiki.com/2.8inch_Arduino_Display
SKU: MAR2808
Driver IC: ILI9341
It works on an Arduino Mega 2560 using the old libraries the manufacturer (I assume) ...
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1
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586
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Connecting Arduino to a cheap Graphics Card for VGA Output
I understand that the Arduino is generally not fast or powerful enough to generate a suitable VGA/HDMI signal with higher resolution.
However, I've noticed that there are inexpensive PC graphics cards ...
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141
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arduino nano fried (TWICE!!)
Having the skill to be stupid has managed to fry not one but 2 Arduino nano boards in the same place (I think it is because this part that smoke came out from of has a lump on it that was not there ...
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2
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1
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89
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ATMEGA2560 died inside a arcade game circuit
I am building arcade game with 10 player buttons (5 for each player) and one start button. All buttons have build in LED inside. Player buttons has LED for 12V and start button has led for 5V. I am ...
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1
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53
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Problem with some sensors but not with servos
I use a lot Arduino Uno, but in this case, I have some BQ ZUM BT-328 boards, which are based on Arduino BT. The problem with some of BQ ZUM BT-328 boards is that the ultrasonic sensor (HC-SR04) is not ...
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1
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365
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Arduino Mega Loopback Test with Several TX/RX Ports
I am trying to do a loopback test using an Arduino Mega. What I am looking to do is send a byte over TX and receive said byte back at RX and verify that the byte is unchanged. More or less I just have ...
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2
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1
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178
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GCRduino shows up briefly in the IDE and then disappears [duplicate]
I have two UNO boards from a few years ago. They look the same as far as chip placement goes.
I can plug both in and get flashing lights on them, and when I hit the reset (2x the on-off) button, they ...
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How does C2 work on the ATMega328P?
What is the purpose of C2 on this schematic below?
How does it work when the microcontroller is being programmed?
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ArduinoMega2560 throws avrdude: com-state error after pressing the reset button a few times
I have recently switched to an ArduinoMega2560 (authentic) from the Arduino Uno and have been having a bit of trouble with uploading sketches after the reset button has been pressed a few times. This ...
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2
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191
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Arduino Uno USB 5 V and external power supply 12 V overheating
I have a issue with my Arduino Uno r3.
I'm not sure why is that happening but I have a 5 V, 18 A power supply to power my LEDs. I connected 5 V from the Arduino to 5 V from the external power supply ...
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2
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Arduino cannot connect to port (arduino nano rp2040)
My arduino cannot connect to any port of my computer. So far i tried the following, without any luck:
Using another arduino to check the usb, and it worked. So no problem with usb cable.
Resetting ...
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1
answer
2k
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Teensy 4.1 / 4.0 When to use FlexPWM vs QuadTimer pins to strobe LEDs
I want to strobe 3 LEDs (at independent frequencies and duty cycles) via mosfets with a duty cycle of 0.05%-1% at a frequency range of 24-100 hz. I would like to hold 1% or better accuracy for both ...
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Why use multiple filters output thousands value, use one or two filter can output normal value?
Problem
If the loop runs only one simulated pin and uses a filter, it will output normally (analog 1600~2200, filter 0~500), but creating an array to store multiple filtered simulated pin values will ...
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1
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How to pre-design circuit before buying? [closed]
I am wanting to make a simple circuit that takes input from a movement sensor and plays a sound response.
To do this I think an ESP32 microcontroler would be optimal?
But how does one go about ...
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1
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56
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Can pin mode damage Arduino with connected electronics?
I am not that experienced with electronics, so this might be a silly question. But I dont know. Assume that I have connected some electronic circuit (transistors, leds, anything else) to the Arduino ...
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3k
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MAX30102 not working?
I have a project to find the pulse oximetry rate. I used MAX30102 and ESP8266 as shown in the first picture.
Wiring
GND ------> GND
VIN ------> 3.3V
SDA ------> D2
SCL ------> D1
Code
I ...
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1
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ATtiny85 plugin and removed it self
So I bought ATtiny85 recently, when I plug it to my PC it make sound like mouse has been plugin, but then it make sound like the device has been removed. It happen again and again until I remove the ...
2
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2
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248
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Higher than 12V Arduino Uno
On many tutorials I have looked at, they say that you should power your Arduino with a 5 - 12V external power supply, but on the Arduino, there is a voltage regulator. Is there anything wrong with ...
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How to connect multiple MPU-9250 IMU sensors to a single Arduino Uno? [duplicate]
The datasheet says the I2C bus limits itself to only two MPU-9250 sensors. How can I control multiple (>2) MPU-9250 through a single Arduino Uno? Is it possible to add another bus?
Please, help.
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ESP12F works indefinitely, then gets stuck in unrecoverable hardware WDT "boot loop"?
I have a sketch running on a number of ESP12F modules (AiThinker). They can work for months on end, can be power cycled, can be moved around, etc. It is a complex sketch with multiple parts and is ...
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117
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Interfacing LM35 and MQ2 with Arduino
When I interface LM35 temperature sensor and MQ-2 gas sensor with Arduino - my LM35 sensor gave incorrect values. From research I've found out that MQ-2 gas sensor dragging the AREF voltage down and ...
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1
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604
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pull-up or pull-down
Do you have to build the circuit on an external board every time you decide there is a need
for a pull-up or pull-down circuit? If not, then what is the alternative and how can you use
it?
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3
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110
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Memory for inputs?
When a button is pressed, the Arduino might be busy with something (like drawing the screen). When the Arduino has finally time to check the button input, the uses might have release it already.
Is ...
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0
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116
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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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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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2
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517
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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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1
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490
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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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0
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34
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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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148
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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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2
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2k
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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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2
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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 ...
2
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1
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3k
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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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1
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318
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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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481
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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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0
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46
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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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0
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785
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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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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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1k
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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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1
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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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320
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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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2
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572
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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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756
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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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357
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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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1
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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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1
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116
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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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1
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1
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1k
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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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2
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299
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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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