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Questions tagged [arduino-uno]

The Arduino Uno is the most common of the Arduino boards. It is based on the ATmega328P microcontroller.

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0answers
22 views

Counter from 1 to 100 and display with several monitor using arduino uno [on hold]

Counter from 1 to 100 and display with several monitor arduino uno
0
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0answers
18 views

Printing vertical text or barcode with thermal printer

I managed to make the printer prints barcodes and print text. So now I need to print vertical barcode or text it does not matter I just need it to be vertical not horizontal, I am using adafruit ...
0
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1answer
11 views

Arduino pins vs Esp8266MOD

I had used Arduino Uno & RFID but now i want to run same code in Esp8266MOD. i have installed all the drivers and everything else to run esp8266 in Arduino IDE but i dont know how to connect rfid ...
0
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2answers
37 views

Why won't my code play a tone for my arduino

I have the following code that I use to try to play a melody on my Arduino, but there is no melody just a tapping noise. I am using the built in tone() function to play on a speaker/buzzer. I know ...
1
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1answer
9 views

Data loging while browsing a menu on LCD shield

I'm new in arduino and not particularly awaken when it comes to code ;) . I'm developing a device SD logging Temperatures from 2 thermocouple . Hardware works well and I'm now trying to refine use of ...
0
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0answers
28 views

Help!!Combining two sketches [on hold]

I need help that is to combine these two sketches..... include<SoftwareSerial.h> SoftwareSerial Serial1(2,3);     //make RX arduino line is pin 2, make TX arduino line is pin 3. SoftwareSerial ...
0
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0answers
24 views

Detect a VGA signal through arduino uno [duplicate]

Is there any way for an arduino uno to detect when a projector or any device is connected to the vga port of my laptop?
0
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0answers
21 views

Proper connection of 6N136/7 [on hold]

I am trying to build the circuit shown in the figure (taken from another question). The funny thing though it works only if I connect D1 in series with the diode inside the optocoupler. Since I am ...
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0answers
38 views

Rethinking question… where's the delete button? [on hold]

Rethinking question... where's the delete button?
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0answers
35 views

Arduino Project [on hold]

i need to program a machine that can, using wheels, move up and down a tube, stopping for 5 seconds in a certain position twice and then finish. can i programme this that, should i know the distances ...
-1
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0answers
40 views

Detect a VGA signal through arduino [on hold]

Is there any way for an arduino uno to detect when a projector or any device is connected to the vga port of my laptop?
0
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0answers
21 views

Arduino to thermal printer

Recently I had a task where I needed to use thermal printer in c# and I managed to get it working, so now I need to do the same thing with the printer but with Arduino, but I have no luck. I tried ...
0
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0answers
24 views

How can I measure the RSSI value using an Xbee Series 1 attached to an Xbee Shield mounted on an Arduino Uno R3?

This is my first question ever on StackExchange so bear with me if I've done/said anything that is not of this site's "ethics". Moving on to the matter at hand... I'm graduating in 2 weeks with a ...
0
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0answers
28 views

4 digits seven segments showing inverted

#include "SevSeg.h" SevSeg sevseg; //Initiate a seven segment controller object void setup() { byte numDigits = 4; byte digitPins[] = {2, 3, 4, 5}; byte segmentPins[] = {6, 7, 8, 9, 10, ...
4
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2answers
63 views

Power on reset with arduino uno can never happen. Can this be fixed?

When an Arduino Uno is powered on, the USB chip's DTR output pin may (is, in fact) low for a while. This means that the capacitor C5 is connected from the 328p reset pin to ground. Thus, when power ...
0
votes
2answers
35 views

What bootloader is present by default on Arduino Uno?

Or where can i find information of default bootloaders present on each Arduino board. All I could look up was it could be one of these bootloaders on the atmega chip :- .Atmega .Atmega8 .bt .caterina ...
0
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1answer
64 views

ets Jan 8 2013,rst cause:4, boot mode:(1,7)

I am facing a issue with the ESP8266-01 as the following below: chksum 0x42 csum 0x42 ~ld ets Jan 8 2013,rst cause:4, boot mode:(1,0) wdt reset Anyone has the solution please help!! #include <...
-2
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0answers
11 views

I want to build arduino gas sensor with buzzer and gsm module a6 [on hold]

I need help for coding to turn on and off the system and send alert message to owners phone no. . Please help me
0
votes
1answer
43 views

Program is working wrong while melody playing

My robot working fine but when I added buzzer and melody into code then is something wrong. Melody is playing when accelerometer is activated but rest of the code need to wait to end of melody. I want ...
0
votes
1answer
22 views

threshold voltage level and blinking problem

I am using arduino pro mini 3.3 V,8 Mhz.vcc of the this arduino is coming from AC-DC converter with regulator 3.3 volt.I am listening analog data from voltage divider approximately 250 milivolts. I ...
0
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0answers
8 views

can i charge a large capacitor with a small resistor? [migrated]

I am working on this simple Arduino CAPACITANCE METER this project uses 2 resistors a 10k ohms resistor for charging and 220ohms resistor for discharging. The arduino is programmed to measure the ...
0
votes
1answer
15 views

vk2828u7g5lf GPS module over SoftwareSerial

So my goal was simple. Trying to get a GPS speed, and show it on a display (later use it to control a stepper motor). I am using the vk2828u7g5lf GPS module from Banggood, which after days of ...
0
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1answer
25 views

Arduino Warnings That I dont know how to solve [on hold]

#define LDR_DriverS A0 #define LDR_MiddS A1 #define LDR_PassangerS A2 #define senQty 3 #define engineA 6 #define engineB 5 //Motor Driver Inputs Pins #define IN1 7 #define IN2 8 #define IN3 9 #define ...
0
votes
1answer
29 views

Programming a switching AC current?

I tried using this code to output AC power from one H-bridge and then another, switching every second, but when I connected a motor to it, it just seemed to output direct current. This is the code I ...
0
votes
1answer
28 views

4 digit 7 segments display wrong number

I'm an Arduino newbie having problems with 4 digit 7 segments display. I want to display some thousands to 4 digit 7 segments display but it display only 0000. I want to receive data from serial with ...
2
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3answers
139 views

Control I2C relay board from two Arduino Uno

how can I make multi master Arduino device to work with single I2C device? As both the master device are 20 m away from Slave device, I am using the I2C relay board to connect with 2 Arduino boards ...
1
vote
2answers
44 views

remotely uploading code to arduino board over internet [closed]

I recently used Particle photon that allows me to upload firmware bin remotely over the internet. I would like to use something like this for my arduino but I cannot find anything like that. Does ...
0
votes
1answer
28 views

Addressable RGB LED Strip

I am looking to create an addressable RGB LED strip circuit with my NodeMCU v3 Wi-Fi. I am looking at a strip of 150 RGB LEDs, 5 meters long, so 30 LED/m. But I am only going to use about 50 LEDs for ...
0
votes
2answers
35 views

Confusion between switch and if?

Following code is to control two LEDs for on and off by two dedicated push buttons. I have used if() for each condition and I was not comfortable writing this code, as I could feel, it can be better ...
0
votes
1answer
57 views

Count fuel liters with Arduino

we have created one fuel sensor in our lab with arduino in order to get fuel data from vehicles.Regarding the code below i receive an error PARSE ERROR: 'attachInterrupt': this function needs to be ...
0
votes
0answers
32 views

Arduino Uno powered by 9v battery gives ticking noises (Otto Robot)

I built an Otto robot based on an Arduino Nano board and powered it with a 9 V block battery and everything worked as intended. I'm currently recreating the project with a group of kids, but we only ...
0
votes
0answers
19 views

FSR Sensor to keep pressure in 7 seconds?

I have a FSR sensor, where I need to ensure that it has a pressing value of at least 250 in 7 seconds. The values are not important, but needs to be above 250 in 7 seconds in order to run an other ...
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0answers
22 views

How can i convert data values into an image [closed]

Yeah so i'm wondering if there is any way to take two values assign them as coordinates, take a third value and assign it as brightness, so it starts drawing a grayscale image. Any ideas?
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0answers
13 views

Connecting BO motor with L293D? [closed]

I have Arduino UNO and this BO motor with me. https://robu.in/product/100-rpm-l-shape-bo-motor/ And motor driver. https://robu.in/product/9736/?gclid=EAIaIQobChMI9r74u5-...
0
votes
1answer
27 views

Trouble understanding connection diagram

The image shows a way of connecting an optocoupler. My problem comes from how the emitter (Q1 in the image) is connected. The emmiter goes to a resistance going to ground and to v_out. When i try to ...
-1
votes
1answer
24 views

Arduino Voice recognition

Is it possible to use only arduino to do voice recognition? or maybe with esp32 no internet. I found speech recognition chip but that's not what i want I got esp32 esp8266 and arduino board. I would ...
0
votes
1answer
52 views

Arduino button-controlled LED with AVR Assembly

I am trying to make a simple button-controlled LED, but I cannot seem to get any input from the button that would change the state of the LED. In other words, the program keeps branching to lighton, ...
0
votes
1answer
33 views

Question about browsing the web using arduino

I have got an arduino, a TFT touch screen and a WIFI module. The question is can i visit a specific web site and display it on that screen and interact with it.
0
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0answers
25 views

Arduino commented while loop will not compile [duplicate]

I have a rather weird issue where my Arduino IDE would not compile if I just change a few lines. The quoted is from the verbose output of Arduino IDE. I skip over a lot of lines giving out file paths....
0
votes
1answer
19 views

Using TFT with hardware SPI and speaker with tone()

I want to make a device with a TFT screen and a speaker that uses the builtin tone() function. However, according to the documentation, using tone() interferes with PWM on pins 3 and 11. On the ...
0
votes
0answers
81 views

Arduino burned vacuum cleaner

I'm a newbie in programming and electronics. So far, i get better lol, after all i don't get my Vacuum Cleaner to work, it allways going to burn the board, Could someone just please take a look at my ...
0
votes
1answer
13 views

Feed values to an array using keypad interfaced with Arduino Uno

I am trying to input keypad values to an array. The code compiles without any error. When running the code, the code proceeds into the for loop and prints 'm' on the lcd, but doesn't execute "...
1
vote
1answer
47 views

Arduino Power Consumption

I am pairing an Arduino Uno along with both a HC-05 bluetooth module and a sensor circuit. Show below is the circuit conditions as well as the circuit. As far as powering up the system, I am ...
-1
votes
0answers
30 views

readping wasn't declared in this scope [closed]

#include <Servo.h> //Servo motor library. This is standard library #include <NewPing.h> //Ultrasonic sensor function library. You must install this library int vale; int ...
0
votes
1answer
31 views

FreeRTOS Timer Use

I use Timer1 on an UNO to generate a 38KHZ signal for IR communications. It all works as expected. BUT, I need to convert the code to run as a task under FreeRTOS, and can't seem to find any details ...
0
votes
1answer
38 views

Getting individual outputs from 4 load cells

This is my first time using an Arduino, and I want to connect 4 load cells to one Arduino board and then get 4 separate outputs for each load cell on a computer. What would I need to accomplish this ...
-1
votes
0answers
16 views

Combining codes for DHT22 and BMP180 [closed]

I am trying to build a weather station and to access its data through mobile SMS/Text messages using GPRS sim 900, but I don't know how to combine the codes of DHT22 and BMP180 into a single sketch. ...
0
votes
0answers
21 views

Unable to send serial data received over RS485 on ethernet

I have connected multiple Arduinos using Max485. I am trying to send data received over RS485 to ethernet using Ethernet Shield. I have modified rolling master solution provided by Nick Gammon. Now ...
-2
votes
2answers
62 views

How to make Built in LED blink systematically?

I am trying to make my built in LED on my arduino blink every 1 second while recording my data and putting it in the EEPROM, but I am not sure how to do that. I am supposed to print data to the EEPROM ...