All Questions

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 ...

I was creating an RGB LED System with one 1 RGB LED controlled by an IR Remote. I wanted to assign a button to trigger a mood-light which cycles through the rainbow, and that works fine. But when I ...

I tried to connect an ESP8266 with an OV7670, but it dose not support this camera. I got an idea: what if I connect it to an Arduino Uno and then send the data to a web server. So I ask for the code ...

I'm using the RadioHead library to have a communication between two Arduino with an NRF24L01+ wireless module. If I send one (1) message, everything works fine. But when I try to send four (4) ...

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 ...

I have posted this problem on the Arduino Forum. I am at my wits-end trying to sort this problem out. I have tried to post the code etc here, but am a new member to this forum. The complete code etc ...

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 <...

I need help for coding to turn on and off the system and send alert message to owners phone no. . Please help me

#include<EEPROM.h> #include <LiquidCrystal.h> LiquidCrystal lcd(7,6,5,4,3,2); int led=13; #define pulsein 8 #define relay 12 unsigned int pusle_count=0; float units=0; unsigned int ...

I've come to understand fuse bits in the last few weeks. I'm working on a bitbanging project on an Arduino Pro Micro, and the signals I'm working with are around 30uS each. For this reason, I think I'...

So I've received few APDS-9900 sensors and found out, there's no library for it (9960 type is supported only). I took that library and device documentation, and created similar library. Ambient light ...

I am using an arduino pro mini 3.3V connected to a PIR sensor ST-00081. The connection is as follows: PIR directly to 3.3v from the PSU board. OUT to arduino pin 3 (2 is occupied). En left floating (...

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 ...

So, I wrote this code myself and I'm a noob on the issue. I did get my code working, but cannot understand why it has to be the way it is. int counter; int ledValue[] = { 1,0,1,1,1,1,1,1 }; void ...

I'm using this time library to access the properties of unix timestamps like hours / minutes / etc. What I want to do is get the current time, and an estimated arrival time, and find the difference ...

I've been coding for FreeRTOS on the MEGA 2560, and was using some LEDs to determine activity per task by toggling each individual LED each time through the task, and monitoring the time using a scope ...

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 ...

I'm controlling a Hitech HS-625MG servo from a 10k slider via a Nano. For a while the motion tracks the slider position even when moved quickly. Then, for no reason I can find, it will stop following ...

I'm building an electronic gate. I'm needing a photoelectric sensor to detect cars. This one in the link looks decent. it runs on 12v so I will need to power it separately from the arduino. But does ...

I am trying too hook up a WS2812B LED strip to an arduino nano. The current strip consists of 6 pixels, and the whole thing is powered via a 5.26V Pc power supply. The problem is that the first pixel ...

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 ...

I'm working with an Arduino Mega and I'm trying to run a stepper motor and servo from the same code. There are two buttons: one operates the stepper and the other operates the servo. I'm trying to ...

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 ...

I have an Arduino script used on a LeoStick to read weather data sensors and provide data via I2C when requested by a C program run on a BananaPro every 15 minutes. This setup has worked well for 18 ...

#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 ...

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 ...

Using a Mega 2560 and PN532 NFC/RFID module, i wanna be able to scan card and see if it's value is (0xF0, 0x21, 0x5D, 0xA7) it should print accepted in serial monitor so it keeps telling me ...

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 ...

I'm trying to write a shell programm to control my Arduino via serial port. I'd like to send simple commands like "Motor1 run 100; Temp1 read; Dist1 read" to perform the desired actions. Therefor I ...

FastLED.addLeds(leds, NUM_LEDS);

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 ...

I'm new to arduino and knnow nothing about electronics. How do I idenitify which pin is which in the coding? eg- I have a pin on my esp8266 "D3"... how would I reference that in the code?

I'm new to Arduino and C. This behavior is not what I'd expect: Serial.begin(9600); while ( ! Serial ); int myCount = 0; for (int i=0; i<10; i++) { myCount = min( ++myCount, 8 ); Serial....

I’m completely new to arduino, so be polite. I’m trying to program my esp32 to drive neopixels as seven segment display. So I take a digit and pass it to switch case and in switch case I mention which ...

I want to know how can I compile and upload the arduino sketch from my terminal instead of using Arduino IDE. I want to use a different IDE for writing code.

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 ...

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 ...

I'd like to use an ATMEGA 328P on standalone mode powered by a 3.3V supply source to control a servo (which is powered by 4 AA batteries, resulting in 6V). My question is: do I have to convert the PWM ...

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 ...

I have already deigned modeled and created a PCB for a bag alarm project i am trying to make, other people have created bag alarms before, but they are just too complicated for this job. I am using ...

I have a WeMOS ATmega 2560 +esp8266 wifi R3 that I want to send sensor data to thingspeak with. I'm just getting started with it, and am having trouble finding a wifi network. I followed this guide: ...

I'm having trouble with using a motorized sliding potentiometer with L298N h-bridge motor driver and a arduino programming environment. The problem is the algorithms that I've explored to slow ...

Nick Gammon posted some code to setup a counter on an Arduino UNO using timer2 to generate a 38KHZ signal, and I've used it on several IR projects. On my current project, I'm using FreeRTOS for the ...

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 ...

i use the example sketch of SD card presented in Arduino IDE. It runs well, but when i reboot my Adruino Mega by the reset button, the SD card initialization fails. To fix it, i need to remove the SD ...

I bought this Arduino starter kit from Amazon. The problem I have now is that the voltage supplied by the breadboard adapter seems to change every time I turn it off and on. And not by small amounts ...

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 ...

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 ...

At my school we have a project where we have to make a robot that can solve a 3D-maze using an arduino controlled robot that uses ultrasonic sensors to determine how to turn. The robot may not be pre-...

I've bought an Arduino Nano, a 5V relay module and a mini water pump (3v-5v). It's the first thing I'm gonna do with this, but I can't find any simple diagram that just uses the 5V out of the Arduino ...