The Arduino Uno is the most common and one of the newest Arduino boards. It is based on the ATmega328 microcontroller.
0
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1answer
19 views
Arduino UNO R3 possibility
Can I use an ultrasonic sensor, ir sensor, serial communication with MATLAB on computer and i2c communication with a D6T MEMS thermal sensor simultaneously in Arduino UNO ?
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0answers
14 views
Arduino GSM Shield web server hangs
I use official Arduino GSM Shield with Uno R3.
I uploaded web server examples from official GSM library. I use a simple python script to make TCP/IP connections to my GSM Shield web server. I send ...
0
votes
0answers
11 views
MPU 6050 DMP weird angles
I'm using atmega328 with Arduino bootloader to read data from MPU6050's DMP with i2cdevlib. With the example provided I'm getting weird angles, meaning yaw works perfectly, but roll and pitch only ...
0
votes
0answers
12 views
Bluetooth Connection with Mac [on hold]
I'm trying to create an Arduino bluetooth remote that can connect with my Mac (or other device) and basically transmit a few distinct signals back and forth at the push of a button (or Arduino ...
3
votes
2answers
76 views
Is there a pullup on I2C?
I am using an Arduino Uno R3.
It is not clear on the schematic whether there are pullups on the A4 and A5 I2C pins.
Are there hardwired pullups or do I have to add them myself?
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votes
0answers
15 views
Grove Temperature With Arduino Yun
I try to test Grove - Infrared Temperature Sensor on Ardiuno Yun with the sample code but it dose not work in the console it show that the object temperature is out of range all the time. However, ...
0
votes
1answer
13 views
Determine difference between 3.3V and 5V shields
How do you determine if an Arduino shield uses 3.3V or 5V on their pins?
Previously, I thought all Arduino shields used 5V, since that's what most Arduinos use. However, I've been researching ...
0
votes
1answer
26 views
lcd.print and 2D arrays
Click here to see my program running
I have created a 2D array (see my full code below), and each row contains one state of a battery here is a schematic :
row [0] : "▯▢▢▷" // this row represents ...
0
votes
2answers
57 views
Arduino to Arduino Communication using HC05
I have been working on a project for work ( I'm a waiter :/ ) I was tasked to build a food wait time display that receives input from the kitchen and echoes the time via bluetooth to another display.
...
0
votes
1answer
30 views
Why is my transistor getting very hot when controlling a 12V peristalic pump?
I have followed this tutorial:
http://www.instructables.com/id/Automatically-water-your-small-indoor-plant-using-/?ALLSTEPS
Every time i try to run my circuit, My transistor gets very hot and ...
0
votes
0answers
26 views
Live video cam on arduino
I'm doing a project where i need a live video capture, not taking pictures. Is it possible on arduino? With this cam ? I want to send the stream to my PC over ethernet. Is it possible? Will it work? I ...
0
votes
1answer
32 views
Saving data in a globally declared float array
I'm trying to send 60 float values via serial. Numbers are provided by an accelerometer and saved in a 240 bytes-long array. The array is sent to a function and these values are then copied in a ...
0
votes
0answers
9 views
Arduino + Bluetooth + Bricktronics (For Lego motors)
I'm new to Arduino and I'm trying to make a Lego based robot that I can control with Arduino. I want to use Bricktronics to connect a Lego motor to Arduino. Below is two sample codes I'm using and the ...
-3
votes
1answer
21 views
Garbage value Serial Monitor
I am building my own arduino.Here is my code Below. I found code working for Digital Ios like blink example ; analog reading, Problem i am facing in Serial Monitor.Whenever i open Serial monitor i get ...
3
votes
5answers
178 views
Extremely cheap “Arduino” for single tasks?
I have been thinking of a million things to do with my Arduino, but those things are extremely simple and it would leave my Arduino as a $25 waste.
For example, programming Arduino to control my ...
0
votes
1answer
26 views
serial char read first letter if it is “;” print char without fists letter
I'm working on a project and I need to print serial to a LCD but only if the first letter of the serial is ":"
I have the serial being stored in a char and a if statement reading the first letter of ...
0
votes
1answer
18 views
Arduino server to read from multiple clients
Socket programming question here.
My interface comprises of an Android device(client), A wireless module hosting an access point, and an Arduino Uno(server).
My Android client class works when 1 ...
0
votes
0answers
31 views
Which Arduino DC Motor Controller Shield to use?
Hi just begnning my life in arduino.
i wanted to try and experiment on 24V DC motors (Dual) and was looking for controllers compatible with Arduino UNO.
When i found this
...
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0answers
26 views
Hi , i am using a ArduIMU V3 to get the yaw,pitch,roll of a surface.But serial results seems incorrect to me.. do i need to calibrate it before using? [closed]
#include <ADXL345.h>
#include <bma180.h>
#include <HMC58X3.h>
#include <ITG3200.h>
#include <MS561101BA.h>
#include <I2Cdev.h>
#include <MPU60X0.h>
#include ...
0
votes
1answer
40 views
What project design tools are available?
What do you guys use for project designing?
I just found out about AutoDesk's 123D Circuits, which is nice but I wonder if there is something with more components, tools, etc?
For example, I can add ...
-1
votes
1answer
47 views
Can I create an FM Arduino radio using only one wire?
Is it possible to make this project, with an Arduino instead of a Raspberry Pi?
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0answers
20 views
Cannot send data from opamp to Arduino [closed]
Hello Arduino community,
I am encountering an issue retrieving data from an opamp to the Bluetooth. I am a complete beginner at circuit building, so please excuse my amateurish mistakes. I am ...
0
votes
1answer
46 views
Lighting 5 leds…the last one lit is always dim
I have a simple project with a close deadline.
I am trying to light up 5 LEDs as part of the project. The first 4 light up in sequence fine, and if I light up just the last one it lights up fine, but ...
2
votes
3answers
113 views
What does Arduino do in 15ms?
I was wondering why there is a 15 ms delay between each iteration of a the main loop.
Code:
The following code shows the execution time expressed in microsec between each loop
void setup()
{
...
0
votes
1answer
30 views
How do I reverse engineer a rotation encoder? [closed]
I have a thermostat. It contains a dc motor (YG300R-09550). This motor is used to open and close the hot water feed to the heater. The motor needs to stop, once it reaches the minimum or maximum ...
0
votes
1answer
37 views
Lessons 2: Spaceship interface
I'm just starting to discover Arduino. Currently, I've done 2 lessons from Arduino book and I have few questions about second circuit.
Why we need to add 10kOm resistors after wire to 2 pin?
Why we ...
0
votes
0answers
26 views
Payload Value in xbee-arduino library
I am trying to configure the payload values for the xbee-arduino library, to send a 0 or 1 via xbee.
This is my code TX:
#include <XBee.h>
XBee xbee = XBee();
uint8_t payload[] = { 0, 0, 0, 0 ...
2
votes
1answer
25 views
Does porting code to different MCU clock frq affect serial baud rate?
Tried to upload my Arduino UNO sketch that writes to serial UART at 9600baud rate onto my ATTINY2313 running at 1mhz . Not getting the signal on the ATTINY, does this have to do with my clk frq of the ...
0
votes
1answer
38 views
Is my TFT screen defective?
I bought the standard 1.77" TFT screen months ago and It has never worked. I follow the wiring diagram shown for Uno on the guide on the Arduino website and the best result I have ever got is it ...
0
votes
1answer
38 views
how to calculate correct resistor value to use with LEDs Potentiometer and other devices?
I have been following http://arduino.cc/en/Tutorial/Fade to fade and LED. But I don't know why they are using a 220 Ohm resistor.
According to Ohms law if LED is of 2.2 V and it runs on 0.025Amps and ...
-1
votes
2answers
30 views
Arduino SoftwareSerial library basic example not work?
I come to you again because I have a problem with the Arduino library SoftwareSerial. With a basic example I fail to see results in the serial monitor.
The basic code example:
#include ...
1
vote
0answers
25 views
NRF24L01 Direct Communication Library Logics
Actually I'm using the RF24 Library mantained by TMRh20 (https://github.com/TMRh20/RF24).
I'm trying to get some type of direct communication between multiple modules working, but I don't want to use ...
0
votes
0answers
21 views
MFRC522 minor problems
I'm working on a small project for a presentation. My goal is to read the UID of multiple Mifare Classic cards and compare it to a hardcoded list for different actions. All is well (the reading and ...
0
votes
1answer
23 views
infrared interuption counter project using Arduino
I would like to kindly request if this kind of project is possible using Arduino motherboard. If yes, what would be the tools to use.
Thanks in advance.
0
votes
1answer
35 views
How to ensure electronic components make good connection with breadboard
I just began following the projects in the Arduino Projects Book included in the Arduino Starter Kit.
While using LEDs, as in the first few examples of the book, I am having a difficult time keeping ...
2
votes
3answers
132 views
Using external power supply to power leds on multiple pins (A0-A5)
I'm totally new to Arduino, and microcontrollers for that matter, so I'm having a hard time figuring out how to connect LEDs to multiple pins, but using a common external power supply...
I've created ...
0
votes
0answers
45 views
Serial.prints ignored
I've been working on a project where I want to transmit data from one arduino to another using an Xbee network and then parse it to update some PWM outputs accordingly (Building a system which ...
0
votes
0answers
25 views
Not in sync: resp=0x00
I had problems with Arduino uno and reseted firmware. Followed this tutorial. Now I can't upload my code Arduino IDE says:
avrdude: stk500_recv(): programmer is not responding
avrdude: ...
0
votes
0answers
36 views
Detect a change in PWM signal
I am trying to detect a change in the PVM signal using arduino uno. Basically a change in the controller, changes the PWM signal's duty cycle output from the receiver. The whole thing is an RC Car. I ...
0
votes
1answer
33 views
MHz Sampling Rate for Arduino
How can we increase the Arduino's ADC sampling rate to 1 MHz while maintaining a 10 bit resolution? Can we change the prescaler to 16 to get 1 MHz ADC clock?
If not, what alternatives are there? ...
1
vote
3answers
82 views
How do you benchmark an Arduino?
I am trying to run a test of the speed of an Arduino, and how it's affected by different temperatures. Does the following code assess this properly?
long num = 0;
long startTime = 0;
long endTime = ...
0
votes
1answer
40 views
Dead reckoning with an accelerometer
Is it possible to use an Arduino, connected to a 3 axis accelerometer, to estimate a platform's continuous change in position and orientation? I have a small mobile robot, and given an initial ...
0
votes
0answers
20 views
stk500_getsync() error
There is an error between an Arduino Uno and Arduino IDE 1.0.6 the error is :
stk500_getsync(): not in sync: rep=0x00
It is impossible to update any program to the Arduino
What is the origin of ...
0
votes
1answer
56 views
Measure Water Flow in literes using Arduino Mega 2560 Board and Water Flow Sensor
I have a water flow sensor with Arduino Megs 2560 board. I am trying to conceptualize the concept to calculate amount of water getting dispensed esp. in 1,2,3,4 and 5 liters quantity.
Water flow ...
0
votes
0answers
27 views
Fast Data Logging of 250Hz analog signal to SDcard via Arduino Uno + Arduino WiFiShield
I have to store sampled data of a low frequency SineWave of 250Hz into a SDcard via the Arduino WiFi Shield. Note that I am relatively new to the Arduino world.
Detailed Requirement Specs:
1) ...
0
votes
1answer
45 views
How can I implement double buffering with an Arduino UNO?
I am creating a tiny game on my Arduino UNO with an Adafruit ST7735 1.8" TFT / SD breakout. I am performing screen operations using the built-in TFT-library.
The problem is screen flickering. Even ...
0
votes
1answer
45 views
Read data from 3 ColorPal 28380 simultaneously on Uno/Mega
I've been trying to get an Arduino (I have a Mega and Uno lying around) to read values from a small array of 3 ColorPal 20380, which individually, work as intended with some reflective material. The ...
0
votes
0answers
13 views
Using PBC library on Arduino
I want to know if there is a way to install/use the PBC library on Arduino UNO. I want to implement some cryptographic primitives using PBC library.
Thank you.
0
votes
1answer
27 views
Can I use this replacement motor without modifying the circuit?
I have a demo that spins a motor, but the leads on my motor broke. I happen to have another motor lying around that I'd like to swap in, but it's of a different type. Here's my circuit:
This is the ...
-1
votes
0answers
42 views
Arduino compiling and linking process
I can't find any information about the arduino compiling process. For example, why we need a bootloader? I know that is loads the program, but... If the arduino has an atmega, why the team didn't make ...
