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65 votes
13 answers
85k views

Is it possible to have more than 14 output pins on the Arduino, I am working on a project in which I need to light up several LEDs individually. I only have an Arduino Uno, and I don't want to get a ...
JVarhol's user avatar
  • 1,903
15 votes
3 answers
6k views

The function millis would be running in the span of 100+ microseconds or less. Is there a reliable way to go about measuring the time taken by a single millis call? One approach that comes to mind is ...
asheeshr's user avatar
  • 3,847
41 votes
10 answers
178k views

I am not very skilled with the C Language and I was wondering if there is a way in which python could be used to program an Arduino. This would most likely require a different IDE in order to be able ...
JVarhol's user avatar
  • 1,903
14 votes
8 answers
10k views

Is there any easy way to upload a program/sketch from an iPad or Android tablet without adding extra an shield (Bluetooth or Wi-Fi)? If not, can it be done using shield? Which shield is preferred? ...
Rajendra's user avatar
  • 301
15 votes
3 answers
8k views

We have an LED strip connected to output 6 and is powered by the Uno board itself. Shouldn't be drawing too much current, only have 10 elements on the LED strip. While this LED strip is connected to ...
Chris O's user avatar
  • 339
17 votes
3 answers
3k views

I currently have a Mega2560 with the LCD4884 Shield. The Shield is good for putting out text and simple pixel images. But I am wondering if there is something that has a full range of colours that ...
Ryan Erb's user avatar
  • 273
22 votes
2 answers
37k views

I've been experimenting with an 8x8 LED matrix controlled by an Arduino Uno. As I think is typical, the matrix uses a common anode for each row, and a common cathode for each column. At the moment, ...
Peter Bloomfield's user avatar
  • 11k
4 votes
1 answer
18k views

I need to simulate my Arduino project with other circuit components before implementing the project. Is there a decent simulator that runs on Mac platform?
M.Medhat's user avatar
  • 49
23 votes
2 answers
10k views

I wanted to make a fairly simple circuit which would flash a series of LEDs in sequence, using my Arduino Uno (more specifically, a SainSmart clone). I wrote my sketch and it compiled fine. After that,...
Peter Bloomfield's user avatar
  • 11k
20 votes
2 answers
5k views

I was looking at getting an enclosure to house my Arduino Uno R3, but I'm not sure if I should also attach a fan. Does anyone have experience with this? It doesn't look like much heat is being ...
B.K.'s user avatar
  • 311
21 votes
4 answers
10k views

In a project I am using a Seeeduino v3.0 as an Arduino clone. On the seeeduino website it says that It is based on the Duemilanove schematic, 100% compatible to its existing program, shield and ...
A.Schulz's user avatar
  • 467
245 votes
13 answers
475k views

I would like to start the development of some basic Arduino projects but I don't own an Arduino board yet. Is there a way I can write my code and emulate/test it using a desktop computer so after my ...
totymedli's user avatar
  • 2,929
18 votes
3 answers
2k views

What is the best practice to make my Arduino circuit more robust against prototyping mistakes (like shorting pins)? I don't want the controller to release its blue magic smoke while experimenting with ...
jippie's user avatar
  • 2,901
-4 votes
1 answer
824 views

I have not already started to try but I'm a good webmaster and I'm just asking which way is more suitable for sending and keeping data from sensors and I/0 state in a database. Here are some points: ...
Jean-Christophe Duperron's user avatar
  • 3
18 votes
3 answers
11k views

I want to unit test my Arduino code. Ideally, I want to execute and test my code without uploading it to the board. What tools or libraries can help me with this? There is an Arduino emulator in ...
Hardik Thaker's user avatar
  • 1,407
14 votes
2 answers
804 views

I have a uno that I have been using for 3 years now. I will be using it again in a rather critical project in which failure on the part of the board could be rather expensive and dangerous. So, I ...
asheeshr's user avatar
  • 3,847
15 votes
2 answers
2k views

Question: What registers do I use to access the IO on the Arduino Uno when I am using assembly for programming? Background: I was interested in practicing my assembly language skills on the Arduino (...
apnorton's user avatar
  • 533
94 votes
22 answers
19k views

The basic Arduino IDE lacks a lot of the sophistication present in other IDEs such as code completion, code collapsing, folder organisation, etc. Are there other IDEs that allow programming in C or C++...
DLJ's user avatar
  • 1,149
12 votes
2 answers
890 views

I bought an Ethernet Shield R3 for my Arduino Uno R2, but since R3 has extra pins it does not fit. Can I use the shield? Should I cut off the extra pins. What do I need to do to make it work?
tstew's user avatar
  • 729
2 votes
2 answers
2k views

I am working on a real time application which is recording sensor data continuously. I need to process the data in realtime using R. Is there a way to connect and communicate with the uno board ...
asheeshr's user avatar
  • 3,847
15 votes
1 answer
386 views

I would like my compiles to exclude some code depending upon the flash/program space available. To be used in the demo code of a library I support. Whereas my current solution is to use a #ifdef of ...
mpflaga's user avatar
  • 2,523
15 votes
2 answers
33k views

If you want to submit sensor data such as temperature to a remote server/database somewhere you need to use some kind of call to a web server since it isn't possible to connect directly to a database ...
HK1's user avatar
  • 397
11 votes
2 answers
6k views

I have been able to connect MATLAB to my Uno with this line of code: a = arduino('COM4'); through this package: Matlab support package for Arduino. Right now, MATLAB is my main script that will ...
Blundering Philosopher's user avatar
  • 213
20 votes
5 answers
10k views

I've made a clock using an Arduino, but the time seems to drift. I am aware of the rollover issue; the clock seems to drift by about 15 minutes over the course of a week. I'm using a custom PCB with ...
John Walthour's user avatar
  • 323
10 votes
3 answers
1k views

The strangest thing is happening to a standalone Arduino board that I designed and built. The board (whose schematics are below) has the following features: It has a ATmega328P with a 5V voltage ...
Ricardo's user avatar
  • 3,390
5 votes
1 answer
670 views

I have an original Arduino UNO R3 that I bought and an Arduino Severino (S3V3) that I've built. I have no problems uploading sketches to the UNO, but sometimes, when uploading to the Severino board, ...
Ricardo's user avatar
  • 3,390
184 votes
21 answers
678k views

I made an awesome program the other day, and I wanted to upload it to my Arduino. After clicking the upload button, some mean dude named avr came along and stopped me, saying: avrdude: ...
The Guy with The Hat's user avatar
  • 5,302
16 votes
2 answers
3k views

I have an Arduino Yún, and it only has 16mb flash onboard for the Linux. I was wondering of it is possible to put a bootloader on the flash that uses the sd card as a rootfs? i want to be able to do ...
TheDoctor's user avatar
  • 3,509
32 votes
5 answers
25k views

Is it possible to run Linux on Arduino? If yes, what steps and limitations need to be considered? If not, what are the limitations that prevent this?
Jakub Arnold's user avatar
  • 428
14 votes
2 answers
920 views

Is it possible to upgrade the firmware on an Arduino so that it can do more things such as change undervolting/ overvolting in order to provide more processing power. To do this you would have to most ...
JVarhol's user avatar
  • 1,903
44 votes
4 answers
10k views

For solar & battery powered projects, decreasing power consumption is a necessity. I know a little bit about using a timer and interrupt to put the microcontroller into sleep when it isn't doing ...
sachleen's user avatar
  • 7,565
36 votes
6 answers
58k views

Put plainly: is there a way to get an HTTPS connection on the Arduino? I have been looking in to it, and I have found it is impossible with the standard library and the Ethernet shield, but is there ...
TheDoctor's user avatar
  • 3,509
49 votes
11 answers
14k views

I'm making a simple Arduino web server and I want to keep it turned on all the time. So it must endure to stay working continuously. I'm using an Arduino Uno with a Ethernet Shield. It's powered ...
Butzke's user avatar
  • 802

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