The Arduino Uno is the most common of the Arduino boards. It is based on the ATmega328 microcontroller.
0
votes
0answers
10 views
Isolating IR receiver from disruption?
I'm using a simple IR receiver connected to the Arduino through A0 analog pin. The problem is that I want to stabilize the output of IR receiver when it's not receiving an IR signal from a specific IR ...
0
votes
0answers
5 views
Scope error in arduino PinChangeInt library
#include<PinChangeInt.h>
#define SensorPin 2
int ledPin=10;
int BuzzerPin=12;
volatile byte blip=0;
void blipcount(){
blip++;
};
void setup() {
// put your setup code here, to run once:
...
0
votes
0answers
8 views
Bluetooth picture frame with arduino
I want to make a wireless picture frame with bluetooth hc-05 module. As of now I am planning to transmit low size bmp image.
First I want to transfer image via bluetooth to arduino Mega and store it ...
1
vote
1answer
15 views
Adafruit Music Maker Shield - Retrieve song names from SD Card
I am currently working on a project that plays music for you. My question for this thread is, is it possible to retrieve the names of the songs within the micro SD card that is inserted into the ...
0
votes
0answers
11 views
How to precisely control servo motor by changing duty cycle?
I developed a PWM using timer1,using arduino uno and digital output, and identified that when I send a wave with duration of 0.6ms in High level, the motor goes to 0º. If I send 2.1ms, it goes to ...
0
votes
1answer
18 views
Responding to a broken laser beam?
Firstly, I must apologise as I'm a complete noob but the Arduino kits / lego pieces are fantastic and I can't stop tinkering. Unfortunatley my knowledge does not match my passion.
I picked up a ...
0
votes
0answers
17 views
How can I store contact to sim card using GSM shield?
I have read Getting the contacts/ storing contacts to SIM card.
I want my GSM module to be stand alone once I programmed it. It will store the phone number of the user if he sends a correct passcode. ...
0
votes
1answer
23 views
Capturing Image from OV7670(w/o FIFO) using Arduino Uno?
I want to capture image from my OV7670(w/o FIFO) and send it to my PC via Wi-Fi(ESP8266)(Which I know How to use) using Arduino Uno. I have read so many blogs and threads on internet but couldn't ...
0
votes
0answers
12 views
Arduino PWM led blinking on 4 pins, each pin Intensity and time period based on the previous pin
I am trying to make 4 LEDs glow using Arduino based on some relationship between them in terms of brightness and time for which LEDs glow.
For example the relationships are:
pin_3_value = 250 (LED 1 ...
0
votes
1answer
11 views
Infra Red Send Hex Code
I am using an arduino nano with the standard arduino IR remote library. For now I am using the Irrecord sketch. However, I want to have some pre - programed codes for remotes I don't have. I found ...
0
votes
1answer
15 views
How to send the MFRC522 RFID module into sleep mode?
I'm trying to get the power consumption of a MFRC522 RFID module down, currently while running it consumes about 4mA. There should be a way to put it into sleep mode, I just can't find any ...
-1
votes
1answer
41 views
I Want to use nested if in arduino , can anyone help me out?
I'm working on Home Security Project and in that I'm using DTMF to unlock the door and PIR sensor to switch on lights , Laser counters to count number of persons entering and leaving the room.
the ...
0
votes
1answer
34 views
General Question about fast Serial Communication and Arduino
I'm looking for a fast (and safe, in terms of stability) way to send sensor data from an Arduino UnoR3 in real time to a Computer (in my case a MacBook Pro) with a sample rate of at least 1kHz.
I ...
0
votes
1answer
30 views
Memory Problems on Arduino Uno
I am doing a project using Arduino UNO, cc3000 WIFI chip, micro SD card shield, and a TTL serial camera in order to make a security system that will post a picture online (not enough processing power ...
0
votes
2answers
55 views
Getting started
so I am not a newbie to computers or programming. I regularly program in C# and Java, know quite a bit about computer hardware and operating systems. But I am bored of writing stupid calculators or ...
0
votes
1answer
35 views
Arduino Uno + 2 Monster Motor Shields
I've got an Arduino Uno and two Sparkun's Monster Motor Shields.
The aim is to control 4 motors.
There is no problem to control 2 DC motors with single motor shield. There's a manual on how to do it ...
0
votes
1answer
50 views
MP3 Shield stacked on DMX Shield - Arduino Uno
We are using Arduino Uno revision 3, with TinkerKit DMX Shield rev. 4 and Sparkfun Mp3 Shield.
We uploaded the Mp3 Shield example called FilePlayer and after we open the serial monitor, the interface ...
0
votes
2answers
23 views
Not able to upload any code to Arduino Uno
NOTE: Using the Arduino Uno
I am WORKING on a project that I have to submit in a few days. My arduino was all set up and was working fine.
Project:Arduino controls a 9v motor depending on the ...
0
votes
0answers
20 views
Dallas Temperature Sensor DS18B20 not showing correct Result with Ethernet Shield
I am using Arduino Uno R3 board and a wiznet W5100 ethernet Shield. The temperature from the One wire sensors before using Ethernet Shield was showing correct. However later after connecting the ...
0
votes
1answer
16 views
Questions Concerning Arduino Compatible Boards
I've seen an Arduino-compatible board called Bluno from DFRobot. I'm curious if a shield, specifically the DFRobot motor shield can be connected to the Bluno.
Can anyone confirm if it can be ...
0
votes
2answers
29 views
Arduino voltage drop while communicating with another Arduino
I have an Arduino Uno rev 3 and an Arduino Nano in my Setup. I want to create a proof of concept, where one Arduino triggers the other via the Digital IOs.
Arduino 1 sets a blinking signal on a ...
0
votes
1answer
36 views
Alternative Way to Power Components on an Arduino
I have very limited knowledge regarding electronics. Please help me cure my ignorance on the subject of robotics.
I want to power the Arduino Uno R3, US-015 ultrasonic sensor, and the L298N motor ...
0
votes
1answer
31 views
Problem with deploying matlab simulink mode to Arduino UNO
I encounter a problem when deploy matlab simulink model to Arduino UNO
Following shows the error
*The call to realtime_make_rtw_hook, during the after_make hook generated the following error:
The ...
0
votes
1answer
48 views
Running C for arduino
Is there a compiler that I can use to run C on an arduino or any other way so that I can upload C programs to my arduino?
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0answers
16 views
How do I use I2C from an Arduino Uno when I have a GSM shield mounted?
This may be an extremely obvious question but I don't seem able to find a definitive answer.
I have an Arduino Uno and a Sim900 GPRS/GSM shield fitted on top of it. I had I2C working on the Arduino ...
0
votes
2answers
50 views
Uploading over Bluetooth Low Energy - bootloader not responding
I'm working on sketches uploading over BLE. I had to write my own uploader (looking at avrdude sources with one eye) so i can change uploading behaviour as needed and it's working over USB just ...
0
votes
2answers
24 views
trying to delay between sequences
I am trying to build a set of four stars using an Arduino, potentiometer and a four channel relay to control how fast it speeds across the stars. My question is how can I delay the process, say for 20 ...
1
vote
1answer
56 views
Why does the ADC overflow when using an external Aref?
I'm using an LM35 temperature sensor, and it outputs 190 mV (which agrees with 19°C). I'm using an external reference voltage which I measure as 417mV. (This is set by the pin "aRefCntrl"). So I ...
0
votes
1answer
18 views
Install Bluetooth inside a home theater, How?
I have a 5.1 home theater(old one), I would like to transform it into a audio streaming system. I have a Arduino UNO and HC-05 Bluetooth Module, and I don't know how to install it in my home ...
0
votes
1answer
19 views
Is is possible to hook up an SD card and a GSM/GSRM module?
Is it possible to hook up a GSM/GSRM module AND an SD card at the same time to an Arduino Uno, or any Arduino?
I want to build a cellphone to read off the buttons that are being dialed into it for a ...
0
votes
0answers
67 views
Arduino uno, ethernet shield, MySQL
I'm trying to connect my arduino uno with MySQL.
This is my code:
#include <SPI.h>
#include <Ethernet.h>
#include <sha1.h>
#include <mysql.h>
/* Setup for Ethernet Library ...
0
votes
1answer
29 views
arduino is not recognized by any computer
I have an Arduino Uno R3 and when I pluged into any computer the computer doesn't recognized the arduino, I checked up and the LEDs are working fine and when I open the device manager It doesn't show ...
0
votes
0answers
32 views
How to Communicate between arduinos wirelessly?
I am doing a project where I need to send some numbers between arduinos. But it has to be wirelessly because they will be moving. How to Communicate between arduinos wirelessly? I need to send data ...
-1
votes
1answer
23 views
Calculating time between Serial events
I am trying to calculate time between two serial events. Using Arduino UNO R3 with 16MHz default clock source.
I am using timer 1 with pre-scale of 64 to get time per one count = 4000ns. This i am ...
-1
votes
0answers
24 views
Best way to control multiple bargraph displays
i was wondering which is the best way to control multiple bargraph displays from my arduino. Currently im using the MAX7219 for the 7 seg displays and now i need to controll the bargraphs. After ...
0
votes
1answer
20 views
Adding a steering servo
I got a Sparkfun Redbot Kit a while back. I ended up building it vanilla and it was a good introduction to the board (the board is basically Uno and a motor shield in one) and the toys that came with ...
1
vote
2answers
44 views
How to use an 8x8 LED Matrix?
I have a LED Matrix just like this one
but couldn't find the data sheet for it (1855AS)
I asked around in my country and one guy told me to try attaching one side to 5v and the other to GND. Some ...
0
votes
2answers
43 views
Can Ultimate GPS module use arduino micro instead of UNO?
i am doing a Ultimate GPS module like this:
it works when i use arduino UNO board, but when I use arduino micro board it doesn't work, so could anyone tell me how to fix it?.By the way I use the ...
0
votes
1answer
55 views
Shift registers. What, how and why?
I'm making a project and I'm using multiple 1 digit 7 segment displays. I haven't plugged them all on my arduino because currently I'm just testing. The problem is on the I/O ports. Obviously I need ...
0
votes
1answer
22 views
Switching a dual h bridge in parallel
I'm using a dual h bridge to control two dc motors on an inverted pendulum (cart-pole system). At the moment, I have to send two different pulse width modulated signals to the two enable pins to ...
1
vote
1answer
24 views
Don't pee there! Device
I want to make a device with a sensor I can attach to the places my dog likes to mark. When sensor becomes wet I want a buzzer to make a loud noise to scare the animal and notify me I need to ...
0
votes
1answer
50 views
Arduino ESP8266 Advice
So I am a complete Arduino noob looking for direction. All I would like to to do is send a text from my phone and make my arduinos motor spin. I want it "wireless" so to speak where the USB does not ...
0
votes
1answer
46 views
Interfacing a CCTV camera (AV output) with Arduino Uno
I have to use a camera to take picture in my major project. I want to use this camera, which has AV output. Please tell me how to interface this camera with my Arduino Uno and use the data from camera ...
0
votes
0answers
45 views
Which Timer can I use to control a servo with Arduino Uno
I would like to control 2 motors using Timer2 @ 200Hz. The frequency of the timer is printed in the main loop every second. I'm using an Arduino Uno with two interrupt used for the encoders connected ...
2
votes
0answers
61 views
How to add the Wiring S board to Arduino IDE v.1.6.2?
My Arduino Uno is running out of memory to support my script (yes, I've tried several ways of optimize it already: PROGMEM, EEPROM, no Strings, and so on), so I would like to upload my script to my ...
1
vote
1answer
55 views
Is it possible to use two encoders with Arduino Uno?
I would like to control 2 motors with the Arduino Uno board, which provides only two interrupt pins on digital 2 and 3.
I've set one encoder using these pins, and it works. What do you think about ...
2
votes
1answer
148 views
Control Speed of DC FAN Using Arduino PID Library
I want to make a circuit that control speed of DC fan Using Arduino PID Library to get thing at specific temperature.
The circuit looks like this but can be changed, The dc fan motor connected to ...
0
votes
1answer
32 views
Wifi module for arduino shield
Recently I bought a B006RATC2E wireless shield for my Arduino One, but didn't notice that I had to buy a wifi module as well to let it work (bad surprise as the shield already cost me $30 + travel ...
0
votes
2answers
63 views
How to have an Arduino communicate with 3 other Arduinos
I was wondering how can I get 4 Arduinos in total to communicate with each-other through a wired connection. The goal is to have the master Arduino send a number 0-100 to each of the other arduinos.
...
0
votes
4answers
74 views
How to send 1 byte from android to arduino
My idea is Arduino sensor will read and pass the values read on android. Then android will calculate and send the control value (PWM) to the Arduino.
but android can only get the value from the ...
