Questions tagged [arduino-nano]

The Arduino Nano is a small board based on the ATmega328 or 168. It has male headers, so it can be plugged directly into a breadboard. It is small and compact, and features a USB chip.

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What is best way to get data from sensors if arduino is slave?

Im working on a project where i have motor controller(arduino nano) being i2c slave. Its job is to get RF24 data and control motor and at same time send data to master about motor... Currently i have ...
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1answer
939 views

Problem with SPI comms using NodeMCU v 3, Nano and SD

Recently I bought a NodeMCU 8266 v 3 (Lolin) and it works fine. I set up a Catalex SD card module (with a built-in 5-3.3V regulator) and all was good. Then I set the Lolin with an Arduino Uno and or a ...
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1answer
2k views

How to work with arduino softwareserial communication using HC-05?

This is my first project using bluetooth module HC-05.i am using two of this module.one is with arduino nano(slave) and another one is with arduino uno(master).I have paired them through AT commands . ...
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1answer
652 views

Arduino Nano CNC V4 AMS1117 3.3V [closed]

What is the role of AMS1117 3.3v regulator is the circuit? All the Nano pins are 5v.
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1answer
59 views

Touch-screen, 3 H-bridges and 3 sensors on Arduino Nano 3.0

I am using an Arduino Nanao andI am wondering if there is a way to connect an 2 inch touchscreen, 3 H-bridges (it takes 3digital pins to power one of them and 1 additional to control the voltage) and ...
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2answers
4k views

How to sync multiple arduinos?

I'm making a posture control experiment in which a series of images (stimuli) are presented to a person and I'm trying to measure the displacement of this person as a result of these stimuli. To do so ...
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2answers
125 views

Turn on/off low current device (LED) with Arduino

I am just starting with Arduino and my first project consists in switching a LED light with Arduino. I know a relay must be use to control AC high voltage device (i.e. 240V), however, as my LED seems ...
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4answers
1k views

SSD1306 recognized in I2C scaner, can't get it to display

The gist of my issue is in the title. I have a cheap ebay SSD1306 128x64 display which I hooked up to my arduino, and checked the wiring at least 50 times and the address is correct, the display has ...
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1answer
2k views

how to set buzzer on and off

I have a project that require me to use magnetic contact sensor. I will put the sensor at the door. So the idea is i want every time someone open the door, the buzzer will make a sound, but it will ...
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2answers
67 views

Basic questions on Inputs

I'm completely new to Arduino or even micro-controllers, I'm not even good in physics. First of all, I'll explain what I am trying to build: I have an Arduino Nano, for a university project (...
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1answer
190 views

Will a pull up resistor help the UART transmission accuracy on Arduino nano?

On A post from Arduino forum , someone mentioned that a pull up resistor over RX/TX pin could help the reliably of UART communication. Is that really the case for nano and uno board?
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1answer
683 views

How to power an arduino nano [closed]

I am trying to power an Arduino nano connected to an LCD screen. I want it to work without connecting it to a computer. Please let me know if the connections aren't clear in the photos. I have a 5&...
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2answers
3k views

DS18B20 and Arduino - Internall Pull-Up [duplicate]

Can this DS18B20 sensor be used with Arduino internal pull-up or it require exactly 4.7k pull-up resistor?
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1answer
54 views

Using DHT11 and EMF - Lag issue

The code is working but there is a delay when the LED turns on and off (physically). Is there a more efficient way I could write this code? I assume it is the delay in reading the DHT11 causing it. ~...
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2answers
50 views

arduino didn't working properly

arduino didn't working properly. When i using a alarm program on pin 6 and a blinking led on pin 2 alarm sound beeps once and then goes down but when using only alarm program it works perfectly. I see ...
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2answers
983 views

If this the way to generate a BEEP for a second [closed]

This buzzer needs to generate an audible sound for one second. The Buzzer is inside a function that is called by a loop that continues to run. It is possible to stop the loop for this one second. ...

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