The Arduino Uno is the most common of the Arduino boards. It is based on the ATmega328 microcontroller.
1
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2answers
19 views
Why does the PIN 13 LED of Uno R3 blink every tme I upload some code?
I was driving a relay from Arduino Uno R3 Pin 13. I observed that every time I upload some code the led on the board designating pin 13 would blink. I'm curious why this is so. I understand that the ...
1
vote
1answer
18 views
Modify SSID and Passwords in WiFi sktechs
This is a question about modifying sketches other than through the IDE.
I'm using an Arduino Uno r3 + Arduino WiFi Shield (not the 101). Up to now I've been using the IDE to manually change the ...
0
votes
0answers
10 views
many other address (3)
I'm trying a project with 3 slaves (send data) and 1 master (read data) and I can do it with 1 byte (send data = 255) with all interacting together but with the other sketch with send 2 bytes (send ...
0
votes
1answer
25 views
arduino with seven segment
anyone can help me regarding the output of this program? and what is the function o Num_Write? thanks. this are codes below:
int num_array[10][7] = { { 1,1,1,1,1,1,0 }, // 0
{ 0,1,1,0,0,0,0 }, // 1
...
0
votes
1answer
11 views
BH1750 Light sensor always giving output as 54612lx
urgently need some inputs,
Connection:
VCC-5v
GND-GND
SCL-SCL(analog pin 5)
SDA-SDA(analog pin 4)
ADD-NC or GND
Code pasted below
used library from GIT : https://github.com/claws/BH1750
#include ...
0
votes
1answer
27 views
What type of sensor could I use to determine the mass of a small object (under 1 kg)?
I'm building a robot that needs to pick up a piece of material and then determine its mass. My robot will retrieve the material using a scoop at the ended of a mechanized arm. Once the material is in ...
1
vote
2answers
33 views
How to apply a programme to all values in a list simultaneously
I'm attempting to turn on a set of LED's one at a time and then switch them all off at the same time, I am stuck however on turning them off at the same time.
That is my code:
int ledpins[] = ...
0
votes
1answer
34 views
How to connect Arduino device to Linux?
I wrote Arduino sketch and it works. It waits for a command and answers text on response.
Simultaneously, I can't get any response with command line tools.
For example, I have the following code ...
0
votes
1answer
18 views
Can i run brushless ESC from any digital pin of arduino
{assume arming is done}
Can i connect the brushless ESC to any digital pin and give writemicroseconds() to it? Will this work. because i have connected my 4 ESC's to "~" pins. so i thinks that other ...
0
votes
2answers
21 views
How can program/arduino restarted by IDE?
I wrote my custom sketch, where I am printing some greeting text inside setup() method.
I found, that each time I am restarting IDE, and opening serial monitor, a greeting text is printed there ...
0
votes
0answers
18 views
How to read 6 RC remote channels using Attachinterupt for every channel
How can i use the attach interupt command and read rc channels in background. I am in doubt that attach interupt is only applied to 2 pins just and cant be used to get data from other pins.
0
votes
1answer
19 views
Driving multiple LED arrays with shift registers
The project I'm building requires multiple LED arrays. I'm going to wire these LEDs in parallel and then connect the arrays to individual pins on a shift register. In addition to the LEDs running in ...
0
votes
1answer
21 views
How to read RC receiver channels without using pulsein() command with arduino
I am building a quad-copter, the problem is of stability and for better stability lesser sampling time is required. For lesser sampling time I need to have faster loop() function. But the Pulsein() ...
0
votes
1answer
20 views
Arduino snake on 5110 screen - some help needed
I'm trying to make a snake game using the u8g lib. But for now, only the second body part of the snake follows the head, where I want the whole body to follow the snake's head and I don't understand ...
0
votes
0answers
25 views
Is it possible to create an interface between Teensy3.2 and a DSP
I realize that this is a forum for Arduino but since the teensy3.2 is compatible with the Arduino IDE I thought it would be appropriate to ask the question here.
Anyways, my question is:
Can I ...
0
votes
1answer
16 views
Separate Timer Instance
I'm trying my best attempt here after failing in Googling the answer, but here goes:
I'm trying to get a separate instance to start running in the background when a pin goes HIGH. How should I ...
0
votes
4answers
47 views
Arduino Uno R3 board dead
I have an arduino uno Rs board and when connected to USB the board is dead. Yet when connected to the external supply the board will come to live. Power LED on and led near pin 13 blink on and off all ...
0
votes
1answer
37 views
Can't figure out how to send Motor Values over Bluetooth, Arduino Bluetooth-controller robot
I was trying to make an Arduino Robot that is Bluetooth controlled but I've some problems!
I can't figure out how to parse strings in Arduino like c++/java/python!
I tried this, If the first letter ...
0
votes
1answer
28 views
Why does my analogRead work on Teensy but not Arduino Uno?
I have successfully made a voltage measurement circuit on my Teensy 3.1 that reads a voltage coming out of digital pin 0 set high and coming back into an analog pin A0 to read voltage.
Basically:
...
0
votes
1answer
21 views
Arduino Interface with Serial device and LCD display
I want to connect my Arduino UNO to a serial device that once powered displays signature numbers. I want to then display those numbers on an LCD display. I have my 16x2 LCD wired correctly and it ...
1
vote
3answers
50 views
Multiple If statements
I am using following code for my arduino project in which i have to control a dc motor using arduino uno via text messages.
my question is that i have used multiple number of 'If' statements and only ...
1
vote
3answers
37 views
Alternative to delay function
I am trying to make a workaround for the delay function. I am trying to use the function in the Analog Write Mega example, by replacing delay with the function i made. However, whenever i use my ...
0
votes
2answers
26 views
Can I use this cheap GPS module with arduino
For my project I need a GPS module, it should be cheap and I should be able to use it with arduino, after some search I got a product on ebay, I'm a 16 year old school boy and I didn't know that it ...
1
vote
1answer
30 views
How is LED powered when PIN 2 is disconnected?
Using the Arduino tutorial "Button", I have noticed that if I totally disconnect Pin2 from the circuit, the LED comes on dimly.
I am trying to understand HOW this happens. Is it simply due to being ...
-3
votes
0answers
48 views
how to make an automated crane using Arduino UNO?
How to make an automated crane using Arduino UNO (i.e it should first detect the object in its given dimensions and pick that object and put that in a destination(e.g. coffee cup or water cup))
...
0
votes
0answers
20 views
arduino uno showing avrdude errors when ethernet shield is mounted
My arduino is 100% woking, it is plugged into the right COM, drivers are up to date. When I run a program without ethernet shield, everything works just fine, but with mounting, it starts showing this ...
0
votes
2answers
33 views
Can I use these cheap GSM module with arduino?
I found two cheap GSM module on ebay but didn't know that I can use them with Arduino or not.
Will you help me please?
Here are the link-
...
0
votes
2answers
38 views
Json gets corrupted after first HTTP request
I'm a web developer and I started building a small environment logger that will post to my website`s API. I'm really new to this kind of coding so bare with me.
Since yesterday, the whole Arduino ...
0
votes
1answer
20 views
Esp8266 server unreachable. Port doesn't open
I have followed all the instructions provided on http://allaboutee.com/2015/01/20/esp8266-android-application-for-arduino-pin-control/
I have got the correct setup, I have got the message "Server ...
0
votes
2answers
34 views
What is the relationship between the gain on the receiver and the delay time
I was conducting some research on wireless communication between a simple transmitter and receiver module using an Arduino. Now, I tested the channel accuracy and i received 14% error for a delay of ...
0
votes
0answers
35 views
Arduino gsm shield web control
There is a GSM Shield and I include conceived through the relay module is not SMS or call and through the web site, sketched a rough sketch but it does not respond to it, please tell me what's wrong?
...
1
vote
1answer
23 views
Help understanding code to build circuit for plant reader
I'm working a design project that measures the tiny changes of conductivity in a plant. (To visualize how a plant reacts to its environment) I'm working with Arduino to realize that. Two wires are ...
0
votes
1answer
46 views
Burned Arduino?
I have an arduino that I programmed a PWM signal on pin 5. When I power the arduino with 12v or USB5v, pin 5 has the PWM signal. Iam checking it with a oscilloscope. Oddly enough the arduino is not ...
1
vote
2answers
38 views
MPU-9250 : How to convert pitch (+90/-90) to 360 degree?
I'm using Arduino Uno with MPU-9250 to find roll, pitch and yaw.
Everything works fine but I want to covert pitch from (+90/-90) to 360 degree.
I'm using this code:
vec.setX(atan2(2.0 * (m_data[2] ...
0
votes
1answer
33 views
Can't upload my sketch from arduino IDE
I am using arduino uno and window7 64bit.I can't upload my program to arduino uno.When I upload it the warning message is show me.The warning message is"WARNING:Category 'USB' in library keyboard and ...
0
votes
4answers
70 views
A knob that can be turned by hand, have the position read, and turned by software to another position?
I'd like to be able to change variables on the Arduino by adjusting a set of knobs. When I get to a desirable setting I'd like to be able to save those settings on the Arduino... and then I'd like to ...
0
votes
0answers
14 views
GPRS shield - Hayes commands to identify a faulty SIM connection
I'm currently battling with a LinkSprite GPRS shield (it's based on the SIMCom SIM900 chip) and seem to have absolutely no luck trying to connect to the network. I've got two SIMs, both of which ...
0
votes
0answers
27 views
How to connect a random number generator's outputs to button inputs [duplicate]
On my breadboard, there is one battery. The battery is connected to six buttons. Each button is connected to one led. My question is, how do I connect the numbers in the random number generator(1-6, ...
0
votes
0answers
23 views
How to control 6 stepper motors with Arduino?
I would like to control 6 stepper motors (0.225 A , 2 V) with Arduino. I was thinking to use motor drivers from Pololu website, for example DRV8834 https://www.pololu.com/product/2134/resources
Is it ...
1
vote
2answers
50 views
Beginner here. Which arduino revision should i buy?
I have no idea what difference is there between the revisions and how it affects me. I have a pdf and this pic was in there:
My questions
which arduino revision is this?
Does it matter which ...
0
votes
2answers
24 views
Wrong calculation UNO
I've a joystick and a servo connected to my UNO, but for some reason my calculations keep on being wrong? I'm trying to calculate how the rotation should be of my servo (Tower Pro 9g, max value of 180 ...
0
votes
1answer
27 views
Need Urgent help, in the project “Arduino for audio processing”
I am following this link from instructable site..
http://www.instructables.com/id/Arduino-Audio-Input/
My question is,
Instead of using the Microphone Radioshack 33-3038, which is listed in the ...
0
votes
0answers
10 views
Arduino connected servo takes double the time to start from its initial position
I am a newbie on Arduino world, I have written a small piece of code which will move the servo motor every 8sec or 10min or 1hr with increment of 15° angle. At the initial setup function I have ...
0
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1answer
28 views
Why can only some digital ports output PWM and the others not?
If it matters, I'm talking about the arduino uno v3.
-3
votes
1answer
35 views
How do you write a randomizer, like, after a sequence of events occurs? [closed]
favorite
I wrote a code for an arduino. It functions like this: you press a sequence of buttons, and then the lights flash three times, and then it's supposed to reset and randomize the order. My ...
1
vote
1answer
39 views
Upload Assembly to AVR on a breadboard using Arduino as ISP
I try to learn assembly and use an arduino uno R3 to act as a programmer. i have build a standalone circuit with an atmega328p, can upload usual sketches (written in c) and have also sucessfully ...
0
votes
1answer
40 views
How can I do this sentence show me in arduino
How can I do this sentence show me in arduino."WARNING: Category 'USB' in library Mouse/keyboard is not valid.Setting to 'Uncategorized'
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0answers
23 views
arduino start up help
How do you make an arduino execute a code right when it is given power (while unplugged to a computer? Also, how could you collect any recorded data once the arduino is operating freely from a ...
0
votes
0answers
35 views
Any disadvantages on using Particle Photon over an Arduino?
It seems to me like Photon is 'winning' on the price front and ease of programming and of course the cheap wifi connection.
I realize the cloud portion (even the local cloud server) could be ...
0
votes
0answers
25 views
Sending an email to arduino and reading its data
I'm pretty much new to arduino, but got a quite an important part on some project. So here is the thing that is bothering me: the user will be sending an email to the arduino and the arduino needs to ...
