The Arduino Uno is the most common of the Arduino boards. It is based on the ATmega328 microcontroller.
0
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0answers
8 views
ACS712 to build doorbell sensor - Arduino Hangs up
I have a ACS712 module that I am connecting to my Arduino Uno to read the current spike when my door bells rings (and then trigger some events in my "sketch").
In my country doorbells use the ~115 ...
0
votes
1answer
10 views
Can a connection of HC-05 and Arduino Nano receive audio and display waveform on computer?
Working to receive Music for Bluetooth Speaker via HC-05
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votes
1answer
21 views
Determining which section of code uses the most flash
I'm running into the 32k flash ceiling of my 328p. The code is pretty compact but I need help making it smaller.
Is there an analysis tool (part of avr?) that can tell me which functions take up the ...
-1
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0answers
28 views
Second “if statement” doesn't work , and the first one work sometimes ? what is the best way to code this?
int analogPin_0=0;
int analogPin_1=1;
int analogPin_2=2;
int analogPin_3=3;
int analogPin_4=4;
int pin_0,pin_1,pin_2,pin_3,pin_4;
void setup() {
//pinMode(analogPin_A,INPUT);
Serial.begin(9600);
...
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votes
1answer
48 views
How to control a large number of devices with an Arduino
I'm doing some initial research on a project I have in mind. I am super new to all this Arduino stuff so taking it slow and gathering lots of info.
I want to control around 1000 small linear ...
1
vote
1answer
29 views
Arduino uno not appearing under ports
I have a Arduino uno attach to my macbook air running the arduino ide 1.6.4, the arduino was visible in the port section this morning, but then it just disappeared, the light on the arduino still ...
0
votes
1answer
18 views
Same Arduino Sketch when uploaded from a Linux machine does not work
I am trying out some code using the Arduino IDE. The code basically tries to connect to a server and push some data to it.
When I upload the sketch to the Arduino from MAC (Apple PC running on Mac ...
1
vote
2answers
40 views
New Language - Interfacing with AVR
So I'm taking a class where the project is to create a new embedded language. We are using OCaml for the compiler, so I was looking for a way to interface with AVR or its C library in such a way as I ...
0
votes
2answers
20 views
Intializing Serial crashes UNO
I have a somewhat large sketch that uses the Adafruit_ssd1306(I2C) library for a 128X64 LCD. The sketch is a designed to be an alarm clock. When I upload the sketch with out initializing serial, it ...
0
votes
1answer
17 views
2 Aurduino Unos Connected with 1-Wire and Receiver Pin getting Stuck High
I am trying to accomplish 1-wire communication between 2 Arduinos and so I wanted to start off by having 1 Arduino toggle a digital output pin and have the other read the state of that pin. To ...
0
votes
0answers
17 views
Linear equation solver Arduino Calculator, printing wrong answer
I wrote a code in C to solve equations, but I don't know why some equations that I input into this calculator, give me wrong values, the algorithm is correct because I execute it in C and give me the ...
1
vote
0answers
13 views
How does changing arduino power supply from USB to Adapter change the circuit?
I have a circuit running with capacitive Sensors, that also has an LED strip. everything works fine when using USB power from a laptop (connected to the mains) and 12v 2A adapter powering 1m LED ...
0
votes
0answers
8 views
EB - 4x4 Soft Keypad Driver Diagram from Makerstudio needed
I have found this interesting device wile looking for a cheap Arduino.
It's a "driver" that converts a 4x4 Keyboard 8-PIN (8-IO)
to a 4-Pin (2-IO) Device
I would like to know if is Achieved by a ...
1
vote
2answers
118 views
How to read code from Arduino Uno to Arduino IDE? [duplicate]
we can upload a code into Arduino UNO from our computers, but how about reading code? Can we read and get C codes from compiled codes from Arduino hardwares? My second question is that will we read ...
0
votes
1answer
33 views
Help understanding how to drive Step motors with Arduino
I am building a 2-Axis gantry system to dispense some thermal paste on boards. I was given two stepper motors in order to do so along with a gantry already built that will arrive in two weeks. So ...
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votes
0answers
40 views
How far can i go just with this starter kit?
I want to buy this kit: http://www.banggood.com/UNO-Basic-Starter-Learning-Kit-Upgrade-Version-For-Arduino-p-970714.html
However, as shipping stuff from China takes like 3 months to arrive, i need to ...
0
votes
1answer
35 views
Arduino UNO coding problem voltage varying
I was wondering if anyone could help me... I am using and Arduino UNO and and I am doing my code in the Arduino IDE and I am trying to implement the code so that the output voltage can be varied from ...
0
votes
1answer
23 views
Reading values from the register of a slave
I am trying to interface MPU6050 with arduino. Found a simple code online, but having a bit of trouble in interpreting it.
// MPU-6050 Short Example Sketch
// By Arduino User JohnChi
// August 17, ...
0
votes
2answers
31 views
Spilt string and convert to float to compare
I'm transmitting: Temperature: 28.22C
and on the receiving end I'm receiving the whole tranmission as a string. I'm trying to spilt Temperature to leave it as a string and 28.22 as a float to ...
0
votes
0answers
19 views
Rf receiver, change timer
I need some help. I use function rx_setup() оf library VirtualWire.h which is used to transmit information wirelessly. The function use timer аnd there is conflict with any of the other libraries. ...
0
votes
0answers
42 views
ESP8266 and Arduino Interfacing
I have connected Arduino with ESP8266 with
Arduino pin 2 connected to ESP's Tx Arduino pin 3 connected to ESP's Rx via Voltage Divider Arduino GND connected to ESP's GND Arduino 3v3 connected to ...
0
votes
2answers
28 views
PYM-1 PIR sensor current concerns
I am busy toying with some PIR sensors to detect movement etc for a nightlight for my kids. One of the sensors I ordered is the PYM-1 PIR sensor.
The data sheet states the following:
Operating ...
0
votes
1answer
23 views
Can Bus Shield Not Receiving Data
I am trying to connect my Arduino Uno board with Seeed Studio Can Bus Shield to my 2006 325i BMW. After compiling and uploading the example program by Seeed Studio, the serial monitor returns "Can Bus ...
-1
votes
1answer
29 views
how to make an led turn on when something gets close to an ultrasonic sensor
Hey I just started using arduino and so far can't get any help with how to write a code for an led to turn on when someone gets in range of a three pin ultrasonic sensor, and off when they are out of ...
2
votes
2answers
73 views
Ardunio UNO. Coding on Incrementing and Decrementing an output voltage by using two buttons
Hello I was wondering if anyone can please help Me. I'm trying to create a code using an Ardunio UNO board to increment and decrement the output voltage of the Ardunio Uno which is 5 volts and I need ...
0
votes
1answer
40 views
Can we control an Arduino with voice commands?
I'm looking for some method to control an Arduino with voice commands.
Could this work on this platform?
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votes
2answers
65 views
Which Arduino Board should I start with?
I am interested in Arduino projects. I want to learn to develop my own Arduino based system. The problem is I am not sure which Adruino board must I start with. Any ideas are appreciated, I have ...
-1
votes
0answers
176 views
How can I reduce the antenna signal strength?
I have an Arduino connected with a Nordic 2.4GHz radio transceiver.
It has around 10-15m of range, and I want to reduce it to ~5m.
I need one of two things:
To know the arriving signal's strength.
...
0
votes
1answer
43 views
MPU6050 causing arduino not to run sketch
I have a mpu6050(which I got from here http://www.sainsmart.com/sainsmart-mpu-6050-3-axis-gyroscope-module.html) and I have connected it to special ports on a sensor shield made for the ...
-1
votes
1answer
33 views
What is the diffrence between following arduino boards and which should i buy? [on hold]
Arduino UNO R3 Compatible Board ATmega328P ATmega16U2
...
0
votes
0answers
36 views
PID control for Motor Speed control
I was trying to apply PI controller to a motor using Arduino. I have somewhat achieved the task but the problem is that it oscillates too much. Also i couldn't figure out what to do when pwm signal ...
-1
votes
0answers
21 views
Help needed in coding to measure voltage [closed]
I need help with my project as i'm new to arduino and I am in need of help as my teacher has given me a tough question for a newbie. In this diagram, I need to construct a part joining with the ...
1
vote
2answers
40 views
Non line of sight radio and arduino uno
I've been using a pair of arduino uno and nrf24l01 and found it wasn't really suitable due to low range when it comes to obstacles.
Essentially I'd like to use it in country areas where it would ...
0
votes
1answer
17 views
How to communicate with arduino uno when arduino motor shield connected to arduino uno?
I'm using this Dual Motor Shield
when I plug Arduino Dual Motor Shield into Aruino uno can't seen any way to communicate with Adruino uno.how can I communicate with uno ?
0
votes
1answer
24 views
Controlling 2WD car chassis with PS3 controller
I'm having trouble with controlling my car with the PS3 joystick, and there hasn't been any example codes out there. I'm using;
PS3USB library from USB_Host_shield_2.0 library
Freetronics H Bridge ...
-1
votes
2answers
47 views
Coding Debugging
This program is supposed to act as a Decimal To Binary Converter, the LeD's acting as output.
The problem is that this function returns Garbage Value
const int LED1 =1, LED2 =3, LED3 =5;
void ...
1
vote
2answers
46 views
How to count the number of times a changing variable reaches a peak value
I am recording a varying distance with an Ultrasonic sensor and Arduino but my problem is I want to display the number of times this variable reaches peak (at an instance the value will be increasing ...
0
votes
2answers
21 views
analogRead-ing Potentiometer Values in void setup()
I've run into a problem while coding a speedometer meant for bicycles. The speedometer would require the diameter of the wheel in inches for maximum accuracy, so I'd like to have an adjustable (by ...
0
votes
1answer
31 views
What's wrong with my Arduino board?
When I connect the Arduino to my PC the Led "ON" lights for a second then turns OFF. I wonder if the Arduino has a fault?
0
votes
2answers
48 views
How to write data in RAM memory using Arduino Uno or Arduino Due?
I know that it is possible to write data in ROM(Read Only Memory).
But what about if I want to write data in RAM(Random Access Memory)?
Can I do it using "Arduino Uno R3"?
RAM is normally associated ...
0
votes
1answer
29 views
Serial.println Sensor Value and text in one line
How do I put the sensor value and text on the one line in the serial monitor.
I just want Pot Value 30 to show in the serial console. What am I doing wrong?
Serial.println("POT value ...
1
vote
1answer
41 views
Why are LED's receiving different voltages connected to Arduino
I have four LED's all connected the exact same way to four pins via four 150OHM resistors. (ignore the sensors, they are doing nothing currently) The code is very simple in the loop:
...
0
votes
1answer
16 views
IDE to program Arduino Uno especially internal interrupt vectors
I am trying to program this Arduino Uno's Timer1 module to use its Input Capture pin to record the times of edges and store / transmit them during the Input Capture Interupt Service Routine, but I ...
0
votes
2answers
57 views
Do I need 3 full-size arduinos to control this LED setup?
I'm sourcing the parts now for an LED persistence of vision setup on a bicycle. Two wheels with anywhere between 16-32 LED's per wheel, as well as 24 LED's mounted on the frame of the bike itself
...
0
votes
1answer
50 views
Where is documentation on Arduino's Internal Interrupts?
First time arduino programmer here...however I have programmed the TI MSP430 in the past...
I am trying to figure out how to configure internal Interrupt Vectors on this Arduino Uno.
In the Arduino ...
0
votes
0answers
17 views
How to effectively modify a library to be able to function with Mozzi Library?
I have sketch that runs almost exactly as I would want it to. Now I am trying to add sound to it using the Mozzi Library instead of just using the tone function. This way I can avoid having to put a ...
0
votes
1answer
44 views
Power source for Arduino uno, sparkfun usb shield and adafruit motor shield
I'm having trouble powering my boards altogether. Right now, I'm using 8x AA batteries to power everything. Running my arduino with one shield runs fine, but not with both shields stacked on top of my ...
0
votes
2answers
24 views
Cannot open ov7670 output file
I have taken a data file using arduino and ov7670 camera module. In this project I used the famous code https://github.com/ComputerNerd/ov7670-no-ram-arduino-uno . But after taking the datafile ...
2
votes
3answers
81 views
Storing and parsing data with Arduino
I use Ethernet Shield and Arduino to GET data from the server in JSON format. Request looks like this:
client.println("GET http://ramp.local/api/actions?");
The response I get is:
...
0
votes
0answers
16 views
Problems when communicating with SD card using ethernet shield
I am using the "SD read/write" code from the Arduino IDE examples to test an ethernet shield (clone). The problem is that although a file is created no data is stored in it.
When running the serial ...
