All Questions

0
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0answers
18 views

Arduino powering to control sensors

I would like to know if it's possible to power up arduino by VIN pin (say 9v) and use 5v output pin to connect to a sensor. Many thanks
0
votes
2answers
29 views

Will a 12 VDC 1A Power Supply Adapter supply too much power and damage an Arduino Mega 2560?

The specs shown here: show that it has 54 digital pins with each outputting a DC current of 20mA which makes it 54 * 20 = 1080 mA Plus the DC current of the 3.3V Pin of 30mA we get a total of 1110mA....
-1
votes
1answer
32 views

Servo or motor with manual control [closed]

I am searching for a servo or motor with the ability to easy manually controlling (turning) when power off. What is the mechanism recommend to use? Thank you for your answer.
0
votes
0answers
17 views

Linear speed measurment with Arduino [closed]

I need your help. I want to measure linear speed of a person who works on farming field in my project using an Arduino sensor but I have been confused to select the best sensor to measure speed with ...
1
vote
0answers
29 views

AC dimmer not smooth dimming

I am trying to create a phase control AC dimmer. But I am not able to achieve smooth dimming. I am using this guide for the circuit: Link On the zero detection part I am able to detect its zero ...
0
votes
0answers
23 views

Error Compiling for board adafruit feather huzzah esp8266

I am very new the Arduino language and IDE I am trying to implement some test code around the wifi101. H library. When I do so, I don't get an error on a specific line of code but an overall error of ...
0
votes
0answers
23 views

Tuning Ardunio self balancing robot’s PID parameters with Genetic Algorithm [closed]

First, I need to tell that I am the newbiest person in the universe about Ardunio. For my PhD thesis I developed an optimization algorithm for dynamic environments. Now I need to test my algorithm on ...
1
vote
1answer
36 views

Arduino New Optiboot Bootloader on custom ATMega328p board, ATMEL Studio and AVRdude [closed]

I am about to ask a kind of complex question due to the number of system parts involved and the system architecture I am planning to use. First of all I have a tiny bit of experience with the Arduino ...
0
votes
0answers
12 views

NodeMCU with JHD162A LCD issue

I have uploaded a program to NodeMCU , to print "hello, world" on JHD162A 16x2 LCD module. But the text doesn't appear on the lcd display. Instead just black blocks appear on the first row on the LCD. ...
0
votes
1answer
40 views

NodeMCU ESP32s can't get Vin to work?

Trying to power the board with a 9V battery through VIN. As the documentation says, it can take input voltage of 6-12 Volts, but when I connect the 9V battery, all it does is power the board on and ...
0
votes
0answers
34 views

Read the image value pixel by pixel

I need your help in SD card and image. It's been a week since I have involved with this problem, So I wish you can help me. Here is the problem: I saved a photo to the SD card and now I want to read ...
0
votes
0answers
23 views

How to use RF 433MHz modules without any IC? [closed]

I have a 433 MHz RF transmitter and receiver , I have been trying to understand how it exactly works eversince i bought it but still iam ambiguous and once I directly tied RF receiver with USB to TTL ...
0
votes
0answers
14 views

Sensor and Development board for Motor Current Signature Analysis [closed]

I have an IoT project for monitoring faults in induction motors. I am planning on doing Motor Current Signature Analysis on the motor but the problem is it requires 10,000 samples per seconds. Right ...
2
votes
2answers
90 views

Why is AREF connected to a capacitor in the Arduino Pro Mini Schematic?

I'm currently looking at the Arduino Pro Mini schematic and have noticed that the pin AREF (analogue reference) is connected to a 0.1uF capacitor as shown below: I have done some research and read ...
0
votes
0answers
51 views

Arduino reading screen color from device (without light/color sensor)

I am a beginner working on a project in which I have purchased a device that can display 4 colors on the display (blue, green, yellow, or red). I would like the Arduino to read what color is on the ...
0
votes
0answers
16 views

8x8 LED Matrix Display - 1588BS [closed]

I am a beginner starting to play around with the Arduino UNO, and I wanted to start playing around with my 8x8 LED Matrix Display that came with my Arduino starter kit. The label on the actual piece ...
0
votes
0answers
19 views

Controlling my motor with arduino through vesc for electric skateboard [closed]

I have my electric skateboard hooked up to my Vesc and i want to control the motor through arduino code with a sensor. I have done research but nobody has really gone in depth with setting it up. Some ...
0
votes
0answers
21 views

Can I use an ST-Link to program an STM32F4 through the Arduino IDE?

I have a bunch of boards with STM32F's on them, and they only have JTAG headers. Is there some way to program and/or debug the boards
1
vote
1answer
50 views

Measure voltage changes with unknown baseline

I would like to monitor an audio stream and detect when it is "active" and music is playing or when it is "inactive" and is silent. What is a good way to measure when an audio stream changes state and ...
0
votes
1answer
32 views

Arduino Mega not receiving data from Neo-6M

I am using the trying to get data from the Neo-6M GPS module with an Arduino mega, but, the condition 'While (gpsSerial.available() > 0' is being met. I believe this means the no bytes are being ...
0
votes
0answers
19 views

Arduino OLED Display strange output

I am trying to use the Adafruit SSD1306 lib with my OLED display for arduino but I've encountered an strange error. I am using the default example "ssd1306_128x64_spi" but the display is odd, the ...
0
votes
0answers
55 views

Arduino based attendance system

I am working on a RFID based attendance system. I am using Grove-125 kHz RFID reader, SD card module, DS1307 RTC and Arduino Mega. Each component works alone (separately) with the Arduino well, but ...
0
votes
0answers
8 views

BLUNO Beetle V1.1 BLE seems defective, Bluno Beetle V1.0 works fine

I have previously had the Bluno beetle V1.0 before which works fine. I have just bought 3 Bluno Beetle V1.1 mc's, but the BLE is not discoverable. I have gone through the same process to update the ...
0
votes
0answers
16 views

Use PWm and zero_cross_detect interrupt

I use an Arduino Uno for controlling one DC motor speed with PWM and one dimmer for control heater. The dimmer and PWM control worked standalone, but when I want them to work together, the dimmer ...
0
votes
0answers
14 views

Upload arduinocode in controllino mini

I have a question how to control my controllino mini. I would like to upload my arduino program to the controllino mini, but this doesn't work yet. I tried several thing: - File → preferences here ...
1
vote
2answers
33 views

Matrix keyboard and 7segment display countdown combination

I'm working on an escape room for my university with an Arduino Mega. The last part consists of a 7segment display representing a time countdown, and the participants have to introduce the correct ...
0
votes
1answer
20 views

Question on pin management using PCA9534PW IO Extender

There is an IO expander PCA9534PW, Arduino UNO. I don’t really understand how I can manage this expander using UNO over I2C. I found an example, but here is the reading mode. What I need: Set the ...
2
votes
0answers
51 views

Why would using the += operator on an unsigned long crash my sketch? [closed]

I wrote a simple Timer class that's designed to work even in the face of the 49 day wrap of the millis() counter. I wanted a library that I could easily re-use and I could never remember the right way ...
0
votes
0answers
32 views

Where to find EEPROM.get()?

I don't seem to be able to find EEPROM.get() function. I am developing my Arduino application under Linux, and inside the libraries EEPROM class only have read() and write(), although here is written ...
0
votes
1answer
23 views

Data received by Arduino from ESP8266 01 Module is not complete

I am sending some data from ESP8266 01 module to Arduino. But the data received by Arduino is not complete. Below are the images of the output from ESP8266 01 module and Arduino. Here is the ...
0
votes
1answer
53 views

How to write a more compact ANDed conditions with if statement?

I'm working on the rfid module and found an example that do it well. But it has a long testing the 5 bytes of the rfid received bytes, and I've tried to write it in a more compact way. I did it with ...
1
vote
3answers
89 views

REST API on Industrial 101 (Yún family) lags, then crashes

I have tried to set up a very simple REST API on an Arduino Industrial 101 (which is, as far as I understand, equivalent to a Yún). The Arduino is hooked up to a temperature sensor, which value is ...
-1
votes
1answer
28 views

L293D with arduino's 5V

I am trying to use L293D with relay to power a 12V DC motor. Can I use arduino's 5V to provide L293D inputs 4 and 8 such as in the drawing? Or do I need to use a separate source, e.g. a power module?
0
votes
3answers
53 views

I want to reset a variable after each 1 second on an Arduino

I want to reset this counter variable which I created after each 1 second, but I don't want to disturb the if statement. Here is the code: int button=A0; int val; int count=0; int presss; void ...
0
votes
1answer
21 views

nRF24L01+ Unable to set address

I'm trying to communicate between Arduino Nano and Arduino Uno using nRF24L01+. I tried using RF24 by ManiacBug and TMRH20, but when I open the serial monitor after uploading the Example Programs ...
-1
votes
0answers
28 views

Game plays itself without any user input

I have followed a hackster project to make a TicTacToe game using TFT and Arduino. I then added new features like adding a timer, game counter and SD card logger. The game seems to play by itself now. ...
0
votes
1answer
13 views

Connecting DAC output from Arduino Due to another arduino

I have an Arduino Due and I want to connect the output from the DAC as an input to an Arduino Uno's analog input pin. From this link http://forum.arduino.cc/index.php?topic=164763.0, user DuaneB ...
0
votes
1answer
33 views

Higher precision logarithms

I need to produce a log to base 10 with at least 4 decimal places. However, the log10 inbuilt function is giving the output with only two decimal places. What do I do? Is there a different function or ...
0
votes
1answer
22 views

RadioHead and Servo compile problems

I am having this problem when trying to compile my sketch. I am using RF frequency modules to send data between devices and a servo motor to control the tilt of a ramp. I understand that both ...
0
votes
2answers
104 views

Serial read multiple digits and always reading 10 at the end?

So I'm trying to make a program that allows you to enter a number in decimal and it displays it in binary, and it's going fairly well after some initial struggles (for some reason it read integers as ...
0
votes
0answers
28 views

GPS led not blinking and wrong LAT Long values

I want to extract the latitude and longitude values of my location but my gps led is not blinking. Also result appearing on the serial monitor is wrong. This is my Arduino code: #include <TinyGPS+...
0
votes
0answers
20 views

library for both HardwareSerial and Serial_ [duplicate]

many Arduino boards use the HardwareSerial class, like the AVR based boards (UNO, MEGA), ESP* and the official STM32duino. Recently seems that Arduino made a new class called Serial_ which works on ...
0
votes
0answers
30 views

Can't push data to ThingSpeak - Status 400 Bad Request

I'm trying to push some data to ThingSpeak using the EtherCard library with the ENC28J60 ethernet module. At the moment I'm using the exemple code that comes with the library just for tests. But no ...
0
votes
2answers
37 views

Blinking LED's at changing rate

I am trying to blink two LED's, starting at slow rate then increasing to fast s follows: 1 on, 1&2 on, 2 on, 1&2 on, 1 on, etc. The blinks go through the loop twice then speed up and repeat ...
0
votes
1answer
22 views

Arduino acts odd when disconnected from computer

I'm building an self-navigating robot with an arduino, an ultrasonic sensor, and two DC motors. I'm currently within the process of coding the robot but I've discovered I have an unusual problem; ...
0
votes
0answers
14 views

Installed configuration won't show up on Board menu

So I was following these instructions on the official site. Download this hardware configuration archive: breadboard-1-6-x.zip, Breadboard1-5-x.zip or Breadboard1-0-x.zip depending on which IDE you ...
0
votes
1answer
18 views

HC-05 with ELM327 mini OBD2 Bluetooth adapter connection problem

I am using Arduino Uno and HC05 Zs-040 Bluetooth module to establish a connection with ELM327 mini OBDII Bluetooth adaptor. I have tried more than 15 different sequences of AT commands and most of ...
-2
votes
0answers
22 views

How to build a Syma X8 receiver by Arduino? [duplicate]

How to control a 4x DC motor (size 180) by one Arduino (similar to receiver Syma X8)?
0
votes
1answer
15 views

Arduino 101 MIT App Inventor extension [on hold]

Can the Arduino 101 extension by MIT App inventor be used in sending data through Bluetooth by an Arduino Uno/Mega?
0
votes
1answer
42 views

Possible to connect 3 MPU9250 to Node MCU without multiplixer?

Is the idea of connecting AD0 pins of MPU9250 is still valid like the 2nd answer of this question? - How to change i2c address for mpu9250? I have connected 2 sensor as test. SCL & SDA of both ...

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