The Arduino Uno is the most common of the Arduino boards. It is based on the ATmega328 microcontroller.
0
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1answer
14 views
Arduino Serial Monitor
I am currently trying to see the result of a query to a thingspeak field.
This works great when I just use a empty sketch and type the commands manually, but using the following sketch I cannot see ...
0
votes
1answer
10 views
Error opening serial port '/dev/cu.Bluetooth-Modem'. (Port busy)
I’m sorry if I sound ignorant and naive, but I’m brand new to Arduion; very keen, but know very little.
I started with a Sainsmart Arduion Uno clone board. I downloaded the software, which opened ...
0
votes
0answers
12 views
Why can't I upload the sketch to my Board?
I am using Roboduino board, Whenever I am uploading the blink sketch I am getting following errors. I am using the board from quite some days. But problem is occuring from now onwards.
-- I have ...
0
votes
2answers
16 views
Pause code untill a button is pressed
I need a code to pause arduino code untill a button is pressed. I have a long code and at point i need a condition that if a Button on pin A2 is pressed then go forward, otherwise wait.
I tried using ...
0
votes
0answers
10 views
Creating a keypad matrix that will communicate wirelessly with an Arduino Uno
I have a 30 button matrix and I would like to use a keyboard encoder to decipher what button was pressed. I would like that information (what button was pressed) to be wirelessly sent to my arduino ...
1
vote
0answers
19 views
How to use the eclipse arduino scope?
i am quite new to the arduino stuff. Got the Arduino IDE installed side by side with Ecplise. Using Eclipse with the Arduino plugin is working well for me, including the SerialMonitor.
I am just ...
0
votes
1answer
14 views
Speaker not producing the right sound after a led strip was introduced
Grove speaker:
http://www.seeedstudio.com/depot/Grove-Speaker-p-1445.html
ws2812-led strip
Hi, I have been working to produce tones on a speaker and it works with the following code
int ...
-3
votes
2answers
26 views
How to blink a series of LED alternately only one at a time
I am very much new to Arduino. I recently bought an adruino uno. i can blink an LED alternately. Such as, 1st blink red, then blink green, then blue like that. once only one LED should blink.
I have ...
0
votes
1answer
17 views
How to use a grove speaker without using delayMicroseconds?
is there another way to replace delayMicroseconds(BassTab[note_index]) as I cannot have delays in my loop due to the need of having multi-tasking in my sketch.
Grove speaker: ...
0
votes
0answers
16 views
Arduino reads bogus from serial
Recently I've started playing around with an Arduino Uno (rev 3), and I've set up a communication bridge between the Arduino and my computer using Python. So I send a command in Python ("ping" for ...
0
votes
1answer
26 views
Running both sensor and addressable LED strips at a same time?
I'm trying to obtain the sensors readings as well as making the LED strips to light up at this particular pattern if the sensor readings reaches certain values. But since both of these codes are ...
1
vote
1answer
32 views
How can I stop my Arduino UNO rev 3 from briefly turning on digital output pins on startup or reset?
I am using my Arduino UNO rev 3 to control other devices via the digital output pins. On startup or reset, I find that these pins are all briefly turned on (perhaps as part of a self test). This ...
0
votes
1answer
47 views
Can anyone identify why this incrementer is losing count?
I am working on a project where the end result is to count the number of cycles of a moving piece of metal using an inductive sensor.
For now I am using an Arduino Uno and have created a breadboard ...
0
votes
2answers
33 views
How to measure nitrogen flow through a tube?
I am looking for a simple way to detect nitrogen gas flow through a tube. I don't even need any sort of precision, just really need to know if flow exists or not.
What are some options I could pursue ...
0
votes
1answer
30 views
Microphone input into Arduino uno R3
I have an amplifier circuit for a microphone.The output of the circuit(the microphone signal amplified) is connected to the arduino A0 .Now the circuit works(I think ,the output voltage is 4.30 V) and ...
0
votes
0answers
16 views
Portability and selection of Arduino
I have written some code for Arduino Uno, which is an ATMEGA microcontroller based device. Can I port the same code over to Arduino Due, without having to make any changes. Arduino Due is a ARM based ...
0
votes
1answer
41 views
problem with using String()
I'm new to arduino and currently trying to build a small program with multiple screens and buttons and a counter. when I try to convert a int to a chararray it messes up the world. with out it what ...
0
votes
1answer
28 views
Does Anemometer consumes power?
I planning to add an anemometer to my small solar weather station.
I designed this system to run from a single 3.7v rechargeable battery and a solar panel so I have to calculate in more power drain.
...
1
vote
1answer
27 views
Execute Code sent over Serial
I was wondering if its possible to send code to the Arduino, and then have it execute this code.
What I'm trying to do is use an Arduino Mega with a bunch of stuff connected to it send code to an ...
0
votes
0answers
33 views
Protocol options for data exchange between Arduino and ESP8266
I have a device built with an Arduino uno:
Arduino software installed on an Arduino uno
can be controlled via serial commands
can be controlled via physical buttons and sensors
on any button/sensor ...
0
votes
3answers
53 views
How can I make motor vibrate using arduino depending on the ultrasonic distance?
I want to make the vibration motor vibrate depending on the distance to an obstacle, for example if the distance is too short it should vibrate quickly and vice versa.
How can i make motor vibrate ...
0
votes
1answer
23 views
Issue with CD74HC4067 MUX on high values
I'm having a small issue with the CD74HC4067 multiplexer/demultiplexer: I am using it to receive data from an array of sensors (at the moment I have only 2, but in a near future they will grow). ...
2
votes
1answer
30 views
avr-g++ (or avr-gcc) and LiquidCrystal library
I'm trying to run simple Hello World program from Arduino 1.6.5 (https://www.arduino.cc/en/Main/Software) from terminal. When I run it in Arduino IDE, it works good. When I'm trying to get it by ...
0
votes
1answer
24 views
Error AT%13% With GSM/GPRS Shield
I've been trying to control a relay with a GSM shield for an Arduino project. I haven't had any success with either the Software Serial or the GSM library. I've declared the GSM variable in debug mode ...
0
votes
0answers
23 views
Varying motor speed with the L293D
Im using a potentiometer to control the speed of two generic 6-8V DC motors. The potentiometer input is scaled from 0-1023 to 0-255, I then use the analogWrite() function to write this value to the ...
0
votes
1answer
31 views
How do I use 3 Hc-sr04 ultrasonic sensors to control 3 vibration dc motor?
This code we are using only one motor and one hc-sr04 ultrasonic sensor, the code is shown below:
#define trigPin 7
#define echoPin 6
#define motorPin 5
void setup()
{
Serial.begin(9600);// to ...
0
votes
2answers
22 views
run two motors in turns without using delay()
I googled solutions and tried, but I still cannot get it working.
I've tried BlinkwithoutDelay.
I feel it is very confusing to track timing of two motors (i.e., step, direction, speed) for the ...
1
vote
1answer
36 views
Cannot upload sketch to Atmega328p TQFP soldered on PCB
After creating a working prototype with DIP ATMega328 chip/ Arduino UNO I recently got PCBs assembled with SMD components and ATMega328P TQFP soldered onto them, but now I'm having a hard time trying ...
0
votes
1answer
26 views
How would i capture and split serial data?
How would i capture the following serial data, and split it into parts?
<Alarm,MPos:0.000,0.000,0.000,WPos:0.000,0.000,0.000>
the parts i need from this is
Alarm - This is a state. i.e Alarm, ...
1
vote
2answers
20 views
Help Connecting MicroSD Module with Arduino Uno
I am Trying to make a MicroSD .wav file player using Arduino Uno. I have ordered a MicroSD Card Module from ebay today.
Product Link : ...
0
votes
1answer
16 views
Replacing Atmega8a pu 1440 arduino Ic with 1337
I have one Arduino uno, and one atmega8a 1337 ic. Can i replace the Arduino uno ic with 1337 to program the 1337 one?
0
votes
1answer
20 views
Arduino code of making a LED digit display not functioning properly
I want to make an LED one digit display using 14 leds used in pairs so I have 7 pairs which show number. (Similar to the display in calculators). Now the problem is that my code won't function ...
0
votes
3answers
25 views
Does the arduino board have to be always physically connected to the electronic device you are running?
If I have a basic electronic board with some LEDs and sound fx and I want to program them (I'm a beginner, learning about arduino), does the arduino board always have to be connected to the actual ...
0
votes
1answer
25 views
Arduino, lcd 16x2 and UTP cable shows gibberish text?
I'm using an arduino uno, and an 16x2 LCD that is connected to the arduino uno with a 1m long UTP cable to transmit data and as well power the LCD screen.
I used to test my code and my wiring with ...
1
vote
1answer
35 views
How to sense mobile signal coming to a room using arduino uno
How to make arduino sense mobile signal coming into a room and display the calling number on an LCD screen
0
votes
1answer
29 views
PPM from remote control is very noisy
I tried to use a function that could smooth out the PPM by using 10 input values and finding the averages. But even this still doesn't seem to be a good way prevent the noise that is occurring when ...
1
vote
1answer
23 views
Underwater positioning system (swimming pool)
I'm making a few experiments with a quite simple rover car I made using Arduino UNO and a few spare parts. Just for the heck of it I made it waterproof and now I want to toss it in my pool to make ...
0
votes
1answer
49 views
What are the basics in writing a program in Arduino? [on hold]
I am an undergrad in ICE. I was searching for ideas to do mini projects on and found this Arduino boards and programs. So actually what are the basics to develop our own gadgets? Any guidelines...?
...
-2
votes
1answer
45 views
Need help in modifying the design
I am planning to do a project on Sequential tilt motion lock using Arduino uno and accelerometer. I would like to present the accelerometer within a rotatable object. So what other components do i ...
1
vote
2answers
109 views
Knowing the Ohms of a Radio Speaker
I have extracted a speaker frim a cheap radio. And I want to connect it to arduino uno. But, I dont know the rating of the speaker. And I am Afraid that If it is over rated, it can fry my arduino. The ...
0
votes
1answer
28 views
Unable to add multiple potentiometer in Midi controller
I am building a simple arduino based midi controller to send cc midi messages. However I am able to send messages only through A0 (analog input).. Any help on this will be appreciated,..
#include ...
3
votes
1answer
50 views
Which device to use to measure AC current using Arduino?
I'm building a home automation product and want to measure AC current using Arduino (as of now). I've used ACS712 5A Hall Effect Current module but there's a lot of electrical noise and also the ...
0
votes
1answer
23 views
What is the overhead time of using Serial library compared to coding it up in AVR C (not using Arduino code)?
I am using an Arduino UNO to drive a UART throughput test and to also test the latency of the slave microcontroller.
The setup is as follows:
Arduino|---UART--------------------------|MCU2
...
0
votes
1answer
15 views
Serial problem after implementing data structures
Context
I first ran a sketch (on Arduino Uno) without any custom data structure and list, so I was using a bunch of arrays, methods and other primitive variables. And it worked perfectly.
My program ...
2
votes
2answers
80 views
UltraSonic sensor in rain?
I am onto a simple project with Arduino, SR04 and a buzzer for "Car reverse parking assistance". The aim here is to make a buzz when the car gets too close to the objects.
I was thinking what if it's ...
0
votes
1answer
28 views
How to change the topic_name string to PROGMEM?
I'm trying to save SRAM on my Arduino pro mini by going through some libraries. I've noticed that to use my Arduino as a ROS node the library stores the topic name and message type as constants.
...
0
votes
1answer
22 views
undefined reference to `PPMintIn::PPMintIn(int)'
I am making a new library that will utilize PinChangeInt's library.
My intention is to further simplify repetitive code by creating a library. (This is to allow for multiple PPM channels without ...
3
votes
5answers
117 views
Two sensors on one input
I got this question from my teacher the other day and I can't figure it out:
If you have two sensors from two different outputs but want them to go into one input, what do you need, and how can ...
0
votes
1answer
15 views
What does a higher clock signal frequency actually mean for my AHRS?
I've got an Arduino with an ATmega328 processor. It can be operated at 3.3V which nets a clock signal frequency of about 12 MHz respectively 16 Mhz at 5V.
I've got an IMU connected to the Arduino and ...
0
votes
1answer
24 views
Connecting MicroSd Reader with arduino uno
I am working on a Project with
(a) Arduino Uno Clone (6 PWM Pins i.e, 3,5,6,9,10,11)
(b) 6 Servos
(c) MicroSD Reader Module
(d) Speaker
As We Know that MicroSD reader modules uses pins 10, 11, 12 of ...
