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Questions tagged [arduino]

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

6
votes
2answers
3k views

Arduino Libaries folder

Where do i put the Arduino "Library" folder on a Mac?
7
votes
3answers
754 views

Frying an Arduino

Can you brick an Arduino just through code?
7
votes
2answers
3k views

Bluetooth power saving mode for ArduinoBT

I'm trying to get my ArduinoBT to be a bit more power friendly, I have it running in a sensor network and it is constantly drawing power. I want to be able to turn off or put the Bluetooth module to ...
6
votes
1answer
2k views

Virtual Wire Control

I'm running Virtual Wire between two Arduino's and, so far I've been able to send characters and receive them on the other side. Problem is, how do I turn this received 'A' (or whatever I send) ...
15
votes
5answers
8k views

RTOS for Arduino?

is there any project of an rtos that works on arduino ?
7
votes
5answers
1k views

Arduino for time lapse photography

How would i set up an Arduino to do time lapse photography?
7
votes
2answers
449 views

Where to cut my power supply for Arduino?

I have no vocabulary for this, so forgive my clumsiness in explaining. I need to hook up a power supply to use with solenoids and an Arduino, but I'm not sure where to cut it. Just before the power ...
10
votes
8answers
14k views

Maximum sample rate of Arduino Duemilanove?

G'day all! I have an Arduino Duemilanove hanging around spare at the moment and thought I might try a few audio interfacing projects. I'm just wondering what sort of sampling frequency I can achieve ...
14
votes
8answers
15k views

What are the best beginner project using an arduino

I'm looking for some cheap beginners projects that show the uses of an arduino. things like turning on and off an LED getting back sensor data ... if anyone has come across useful youtube video ...
32
votes
4answers
7k views

I2C 3.3 to 5.0 V conversion

I'm trying to interface a 3.3V I2C device to a 5V Arduino. I don't have any problem with SCL line. I can use a simple voltage divider but I have an issue with the SDA line as this is bi-directional. ...
10
votes
5answers
10k views

Monitor clock cycles for code on arduino/AVR?

Is it possible to monitor a block of code and determine the number of processor clock cycles that code took on an Arduino and/or AVR atmel processor? or, should I rather monitor microseconds passed ...
5
votes
1answer
491 views

Arduino with atmel tools

Hi I've done some dev using AVR's. I'd really like to use the arduino but continue using atmel tools. Is this straightforward? Is there a converter that I can use my 910 programmer with? I think ...
11
votes
7answers
1k views

Custom PCBs… what can go wrong?

I'm anxiously awaiting the delivery of my second set of custom designed PCBs from BatchPCB. The first board I designed was pretty darn simple and didn't have any problems. This second set includes a ...
8
votes
5answers
1k views

Synchronise multiple Mega boards to run multiple servo motors

My friend Jules asks: The aim is to get as many servo motor controls as possible - looks like the maximum an Arduino will output is 14? Digital I/O Pins54 (of which 14 provide PWM output) I ...
5
votes
6answers
5k views

Where can I source extra long headers from [closed]

I have recently purchased a sparkfun protoboard that I wish to stack above an ethernet shield. (I have 2 different ethernet shields, an Arduino one and a seeed studio enc28j60 shield.) The problem I ...
4
votes
4answers
5k views

Arduino Text to Speech

has anyone used the arduino to convert text to speech?
21
votes
10answers
5k views

Is Arduino ideal for making a HRNG (hardware random number generator)?

I'm putting together a design for a hardware random number generator that will utilize multiple sources of entropy (combined): Ambient light Ambient sound (and sound levels) Ambient temp Ambient ...
4
votes
3answers
2k views

Audio Frequency Shift Keying to Arduino

I am attempting to have an Arduino interpret an AFSK signal, this is very vague but can anyone just point me in the right direction for detecting the frequency of the AFSK signal with an arduino?
2
votes
2answers
1k views

Phone RF Module Interfacing with an Arduino

A little while ago I desoldered a 900 MHz phone and its base's RF modules and was wondering if anyone could help me to interface them with an Arduino, or just help find a datasheet. The numbers on ...
5
votes
7answers
17k views

What sort of things can an Arduino do?

Sorry for the question, I'm just starting out in robotics - as a hobby- and I was just interested in what I'll be able to actually do, please let me know,
3
votes
1answer
2k views

Connecting bluetooth to Lilypad Arduino

How do i connect bluetooth to Lilypad Arduino?
8
votes
7answers
15k views

Encryption Library for Arduino

I am using an Arduino to read a keypad and open an electric strike upon keypad PIN entry. For this sketch I wanted to use some sort of lightweight encryption to store the PINs in EEProm. Does anyone ...
6
votes
3answers
2k views

Arduino Bootloader

If I upgrade my arduino from the ATMega 168 to ATMega 328 will I be able to use the ATMega 168 like a stock chip from the factory or will the bootloader prohibit this? In other words, will I be able ...
3
votes
2answers
1k views

Arduino chip wipe on reset

Does the Arduino chip get wiped of any (uploaded) code when you press the reset button? and Can you retrieve the code that is currently on the chip?
7
votes
5answers
4k views

Implementing I2C to analog

How can I implement (or maybe there is an IC that already does that) a board whose input would be I2C and output would be analog voltage (0V - 5V) ? Eventually I would like to connect a couple of ...
2
votes
1answer
1k views

ATMega chips come with the Arduino bootloader

Do the Arduino Duemilanove USB Board with Atmega328 come with the Arduino bootloader?
7
votes
4answers
9k views

How to hook up a 5x7 LED matrix to Arduino?

What is the best way I can hook this 5x7 LED matrix to an Arduino board?
8
votes
5answers
5k views

Teensy development

Has anyone used the teensy? - I have a need for a serial port as well as USB connection and this looks good. Any opinions welcome. Is it difficult to use with the Arduino IDE? What are the downsides ...
21
votes
3answers
9k views

Jtag debugging AVR

Can anyone advise what hardware and software is required for debugging AVR in circuit.
-1
votes
1answer
176 views

Relay Tester Box with BlinkM

I'm trying to create something similar to this project and was looking for something cheap to use in place of the Relay Tester Box.... Any Ideas?
6
votes
1answer
8k views

How to control a VFD display with Arduino?

I have a Samsung 170L40AA1 VFD display, but no controller. So I wondered if it is possible to use an Arduino to control it instead. I've found the code for controlling an Futaba NA202MD13AA, which I ...
9
votes
3answers
3k views

How do I detect the pattern of the knock on a door, and use it as a signature to unlock a door?

How do I detect the pattern of the knock on a door, and use it as a signature to unlock a door?
9
votes
2answers
22k views

How to connect LED Matrix into Arduino using MAX 7219 ?

I have 2 8x8 LED Matrix, a MAX7219 Chip. I just wonder how can I connect that to the Arduino Duemilanove? I have been googling but I couldn't find out how.
4
votes
7answers
6k views

iPhone hardware serial port access

Does anyone know how to access the iPhone's serial port, from a program on the iPod to allow that application to send signals. The idea is that the iPod could be used as the brain for some kind of ...
5
votes
6answers
1k views

Serial Enabled LCD

What sort of LCD should should i be using to go with my Arduino? I have used the HD44780-compatible LCD in the past, but heard that the Serial Enabled LCDs make life a lot easier.
9
votes
3answers
2k views

How would I get a full range voltage reading from a pressure sensor?

I am making an application using the DIY Force Sensitive Resistor (FSR) taken from this instructable. The resistance of this sensor typycally ranges from 20kOhm when at rest to 9kOhm when pressed. ...
12
votes
3answers
7k views

How to use 3.3V and 5V outputting sensors with Arduino?

To get full resolution from Arduino ADC when using 3.3V sensors you must do two things. Connect 3.3V power supply to AREF pin. Call analogReference(EXTERNAL) in the code. But what about if I must ...
7
votes
8answers
5k views

Pins on an Arduino

If I'm running out of pins on an Arduino, short of buying a second one or getting a Mega board, is there a way to get more connected to the one board? Do I need to worry about overloading it?
6
votes
5answers
975 views

Joystick with the Arduino

How do i go about using the joystick with an Arduino?
4
votes
3answers
5k views

Using the iPhone to control a remote controlled car via Arduino

So i started this project a while back where i made a remote controlled car that i could control with the directional buttons on my keyboard via an Arduino -> now the next step i want to do is to get ...
4
votes
6answers
2k views

Arduino Twitters

I'm looking for a list of cool projects that people have made with the arduino that twitter...i have read about plants that tweet when they need watering or pets who have a button to let you know when ...
3
votes
3answers
413 views

Using a Wii Nunchuck for data collection

Anyone got a good tutorial on using and Arduino to capture the Wii Nunchuck accelerometer data?
27
votes
6answers
63k views

How to drive brushless motor with Arduino?

Is it possible to drive a brushless motor directly with Arduino? Or should I revert on controlling a brushless motor ESC with PWM pulses?
18
votes
8answers
8k views

Electronic pet-door access control - RFID

Inspired by projects such as the tweeting cat door and CATaLOG [sic] I’m wanting to add some form of automated access control to our pet door to control who can go in and out, when. (Full Disclosure: ...
15
votes
7answers
67k views

How do I measure the RPM of a wheel?

I'm trying to make an onboard system for my bike using an Arduino or maybe the Lilypad boards. I think I should use a Hall effect sensor, but any alternative is good as well. I want to output my ...
6
votes
2answers
1k views

IR Remote code for Arduino

I've just hidden away our entertainment centre electronics including our Infrared controlled DVD Player, Amp and Mac Mini . I was wondering if there is any IR Remote code for Arduino, that I can use ...
12
votes
7answers
7k views

Saving data to an SD card memory module using an Arduino

Is it possible to save data from the Arduino to an SD card memory module?
13
votes
2answers
16k views

How do I drive an ultrasonic transducer with an Arduino?

I am attempting to build a cat deterrent with an Arduino, something akin to this. I have figured out detection, and now realize that I need to use an ultrasonic transducer to produce the 'blast' that ...
32
votes
8answers
220k views

Saving Arduino sensor data to a text file

How can I save data retrieved from a sensor to a text file on the computer?
7
votes
1answer
4k views

Upload to an Arduino from the command line

If I have a sketch compiled to hex, is it be possible to upload this sketch to an Arduino board using avrdude directly from command line? Pekkaa figured out that arduino ide executes the following ...