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Questions tagged [arduino]

Be sure to use the Arduino Stack Exchange for questions that are more Arduino and less electronics.

4
votes
1answer
1k views

Using Multiplexer with an Arduino

I am trying to get a Multiplexer to work with the Arduino. Description at sparkfun Datasheet I thought the wiring was pretty simple and as a basic test, I have AREF connected to C1(multiplexer) and a ...
5
votes
1answer
388 views

Tapping into unused Arduino pins with a shield in place

I am just getting started with Arduino...I figure this is kind of a newbie question but here goes. I have a Duemilanove and the Sparkfun Speakjet shield. I've got some breakaway headers (not the ...
5
votes
4answers
6k views

Configuring INA126 Instrumentation Amplifier for Data Acquisition

I have a TI INA126 (datasheet) instrumentation amplifier that I want to use to amplify a noisy, low-level signal from a fabric-based resistive stretch sensor. The resistance ranges for the fabric ...
11
votes
6answers
6k views

Inductive Charging

I've build a small three wheel robot with an Arduino Mega to drive the thing. I'm looking to keep this bot mobile as much as I can without needing to interact with it for charging etc. For the moment ...
2
votes
1answer
1k views

RFID Reader UART

Was wondering if someone could give me a hand with a project that I am undertaking. I have searched forums high and low and am yet to find the information to solve my problems. Basically I have an ...
5
votes
6answers
2k views

SDHC card, a microSD shield, and Arduino Duemilanove

I got a new microSD shield from LittleBird and am having some troubles with it. I downloaded the sample library that it said to used, threw in a microSD card and expected it to work... It won't ...
5
votes
5answers
6k views

DIN rail enclosure for a Arduino + Ethernet shield

I am looking for a way to put a Arduino with an Ethernet shield inside a DIN rail enclosure while exposing the RJ45 and a few screw terminals. Bare min: 55mm Width, 75mm length, 30mm height. Looks ...
10
votes
8answers
3k views

Is there a Scratch-like Arduino IDE?

I believe that the answer is no, but I wanted to check before I put effort into rectifying it (and no, no promises!) Is there anything like Scratch that one can use to program an Arduino? (Scratch ...
9
votes
3answers
4k views

CD-ROMs open/close in response to sensors

The general question: How can I open and close CD-Rom drives (about 20-30) in reaction to various sensor input? Some more specific questions (based on the assumption that I should to tackle this ...
9
votes
3answers
10k views

Securing code on an AVR/Arduino and delivering updates

What is the best way to protect code flashed onto any AVR based device from reverse engineering? What is an easy way to provide updates to end users to flash on their own without disclosing the code? ...
5
votes
3answers
776 views

Problems installing 'Processing'

I am new to the whole Arduino thing and am having problems loading 'Processing'. When I attempt to run the Processing program it says 'This Program requires Java Development Kit 1.5.0'. When I go ...
4
votes
1answer
2k views

QTR 8RC White line detection

I am using a qtr8-rc sensor array on a line following robot, When I use it on a black line on a white surface it works but when i try to use it on a black surface with white line i can't get correct ...
5
votes
3answers
7k views

Arduino PCB etchable pdf

Where I live, one cannot buy an Arduino very cheaply. I figure, if I make one for my own purpose on a pcb then it would be much cheaper and would be much more fun. I cannot find any etchable PDF on ...
5
votes
3answers
1k views

Redesigning the Arduino Duemilanove and Ethernet shield in to a single board

I have build a prototype with the Arduino Duemilanove and a Ethernet shield. It works great, now I want to get it redesigned in to a single board with a few extra connectors. Screw terminal for ...
7
votes
6answers
8k views

Suggested exercises for learning with Arduino

I just got an arduino and have been working through some of the exercises in the tutorials, making good progress. When I'm learning a new programming language or tool, I usually work through a few ...
2
votes
6answers
2k views

How do you develop software for the Arduino?

Is the main way of programming the Arduino's Atmel MCU thru a Visual Programming environment such as Max/MSP? Or do you have to write typical C code? What are the different ways available?
5
votes
5answers
24k views

How much current do you require in Arduino and embedded systems projects?

How much current do you require in Arduino/Sanguino or other embedded systems projects? After responding to the LM2575 inductor question I started to take a closer look at the TI power DC-DC ...
7
votes
1answer
4k views

How can I use avrsim to simulate Arduino?

I found vary nice open source avr emulator ( http://gitorious.org/simavr). Since there is uart emulation implemented it can simulate Arduino. There is board_simduino example, but I have some problems ...
19
votes
7answers
36k views

How many individual lights can an arduino control

I want to use a regular Arduino board to control LEDs - what is the most lights I can control individually from the board? Is there a tutorial on how to hook it up?
6
votes
2answers
2k views

Can I combine the power supply?

Here's the circuit I'm working on, it's a robotic stringed musical instrument thing, that uses 6 DC motors and an Arduino Duemilanove - The resistors are 0.25w 1KΩ The transistors are TIP122 ...
4
votes
3answers
14k views

Hooking up an LCD to Arduino Diagram

Has anyone got a really clear diagram of the way to link up a 16x2 LCD screen to an Arduino? Basically I have an LCD for which the back light is coming on, but I am not getting any words appearing on ...
4
votes
3answers
3k views

Using Arduino to program Amtel AVRs via ICSP header

I have an Arduino (NG) board with an ATMEGA168 AVR micro. The board has a 6 pin ICSP header. Here is what I propose to do, please tell me if it is possible: Remove current ATMEGA168 IC Replace with a ...
4
votes
1answer
1k views

Arduino Speed Controllers for RC Cars

This may be a lame question but, Speed controllers on big RC cars can they be controlled from Arduino? If yes, do they have a standart? do I control them using PWM values? What should i look for if I ...
3
votes
4answers
2k views

newbie code query => Arduino & DS18B20

been using picaxe for a few years but now playign with arduino and trying to learn how it all works. I have a couple of arduinos talking via the HOPERF library successfully and now want to send some ...
6
votes
2answers
1k views

Arduino Tweeting Weather Station [closed]

I want to create an Arduino Weather Station with Temperature Rain Gauge Wind Speed Wind Direction Humidity What peripherals should I be looking at getting? Ideally I want this project to tweet the ...
1
vote
2answers
4k views

Programming a PICAXE with an Arduino

Can you program a PICAXE microcontroller with an Arduino Duemilanove Maybe with the ICSP (6 pin) header?
5
votes
2answers
10k views

Arduino Vin Pin

This maybe a very stupid question but, how much power is available via Vin pin? I am assuming it is 5 volts, but how much amps are provided? EDIT: I am trying to run a dc motor using ardumoto shield,...
2
votes
2answers
1k views

Arduino Ardumoto

I am using Arduino and Ardumoto dc motor controller to drive a DC motor. I am kind of at lost because i have gone through 10 different motors. They either don't work( not enough power ) or not ...
2
votes
2answers
2k views

power supply unit for Arduino/solenoid project

I'm trying to find an off the shelf plug in ac/dc power supply unit to work with my project. I want to power an Arduino Duemilanove and six 12v 1A solenoids. Here's the solenoids -> http://www....
5
votes
2answers
3k views

Making an Ethernet Shield work with an Arduino Mega

customer question: I have had no success with the ethernet & saw some fine print Please note that the current design of the ethernet shield is not compatible with the Arduino Mega http://...
4
votes
1answer
371 views

ArduinoBT UART Communications

Is there any way to monitor what is being sent to the WT-11 module via UART? I'm trying to implement deep sleep on the WT-11 and can run the iWRAP "TEST DEEPSLEEP" command successfully but the deep ...
3
votes
3answers
2k views

ATMEGA168 (P/V/ 10/20 AU?) + Arduino Booloader Flashing via AVRDUDE?

I bought about 10 ATMEGA168V's (which I thought were P's) and tried to flash with TinyISP via the Arduino IDE with the arduino mini pro board selected. Well this fails for the obvious reason that the ...
5
votes
1answer
28k views

What Operating Systems are available for Arduino? [duplicate]

This question seems to suggest that people are developing Operating Systems for the Arduino platform. What Arduino OS projects are you aware of? Please list only one project or OS per answer, and ...
4
votes
6answers
3k views

How do you convince people to use Arduino

So I have this friend with a problem...I swear...it's not me! I like Arduino. I wasn't sold on the concept at first but I'm firmly in the "it's awesome" camp. Anyway, what I'm really looking for is a ...
2
votes
3answers
7k views

What is the best Arduino Operating System?

What is the best Arduino Operating System?
7
votes
5answers
4k views

How do I read analog devices that produce relatively high voltage?

I found a sensor recently that emits ±90V (AC) on stimulus. How would I go about reading this from an arduino? Update I didn't think there were so many options. :) The kind of thing I'm looking ...
8
votes
5answers
14k views

Best way to control 75 LEDs with Arduino

I need to control 25 groups of 3 LEDs or 25 RGB LEDs. Each group will be dismissed from the uC by up to 20 cm (about 8 inches). 20 cm is very safe assumption but I think it will be 10 cm or less. ...
5
votes
1answer
2k views

picking a FET for 12v use with Arduino

I am working on an Arduino project where I would like to use an output pin to control a 12v load with a mosfet. I think it should be an n-fet, but am not sure. I have been looking at specs, and don'...
5
votes
4answers
436 views

What is Arduino?

What is this Arduino concept that I keep hearing about? Is it a microcontroller family, or a demoboard? Please include pictures in your answer, and if there are multiple possible items known as ...
26
votes
15answers
25k views

Controlling 500 LEDs with PWM

I'm considering taking on a project that would involve individually addressing 500 LEDs, optimally with PWM support for each. I'm planning on using an Arduino since I already have one, but I'm open ...
12
votes
8answers
23k views

Wireless communication over long distances

Would like to communicate between an Arduino and a PC but over a distance of 2500+ feet outside in the open, wirelessly. What would be the best way of doing this? The communcation devices I have ...
9
votes
4answers
5k views

Connecting a Lilypad to a WiFi network?

I would like to connect my Lilypad Arduino to a WiFi 802.11 network that provides internet. What is the best way of achieving this? Can I use a XBee module and somehow interface with my home router? ...
7
votes
10answers
3k views

Recommendation for Arduino [closed]

Okay, here's some background info leading up to the [obvious] question with further elaboration: I have been using a 28 pin PICAXE for small projects here and there for the last couple of years and am ...
36
votes
10answers
47k views

Why is AVR used in Arduino?

Why is Arduino using AVR? I understand that they are the official processor but there isn't a reason the code couldn't be ported to an ARM or a Freescale architecture other than cost, right? As long ...
6
votes
4answers
5k views

How to connect the Arduino with Twitter via GSM/GPRS?

I know there are tons of projects that use WIFI or simple LAN shields to send sensor data from the Arduino as Twitter messages. How could this work with a mobile phone connection? Are there libraries ...
11
votes
3answers
3k views

Controlling High Voltage device with Arduino

I want to control lava lamps using Arduino. I think it shouldn't be hard project, but I have no experience with hardware projects so I'm not sure witch design will feet best for me. I consider using ...
11
votes
4answers
1k views

Anyone ported the QP state framework for Arduino?

In reviewing possible approaches for my data logging project, I have found the book "Practical UML statecharts in C/C++" to be very interesting for more serious work with the Arduino. QP is a family ...
11
votes
3answers
2k views

Monitoring voltage without a known reference

I'm working on a little sensor platform that runs off of batteries. I'd love to be able to trigger an alert when the voltage gets too low. The problem is that anything I use to measure that voltage ...
29
votes
3answers
5k views

Arduino pin spacing

How do you get around the annoying pin spacing on the Arduino? Where pin 7 and pin 8 are not standard spacing. Why is it set up like this?