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Questions tagged [arduino]

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9
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 ...
7
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
3answers
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?
8
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 ...
3
votes
1answer
1k views

ATMega chips come with the Arduino bootloader

Do the Arduino Duemilanove USB Board with Atmega328 come with the Arduino bootloader?
8
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?
7
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 ...
23
votes
3answers
9k views

Jtag debugging AVR

Can anyone advise what hardware and software is required for debugging AVR in circuit.
-1
votes
1answer
189 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.... The project used an old relay tester box to control a colour LED ...
7
votes
1answer
9k 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
4k 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, and a MAX7219 Chip. Q: I just wonder how can I connect that to the Arduino Duemilanove? I have been googling but I couldn't find out how.
5
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 ...
6
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.
10
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. ...
13
votes
3answers
8k 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
6k 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
980 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
419 views

Using a Wii Nunchuck for data collection

Anyone got a good tutorial on using and Arduino to capture the Wii Nunchuck accelerometer data?
28
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?
19
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
69k 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 ...
13
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
17k 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 ...
34
votes
8answers
250k 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?
8
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 ...
10
votes
6answers
2k views

Capacitive Sensing

Is there a way that I can make an Arduino or other Micro-controller detect a change in capacitance? I'm thinking of having a screen on my door that only turns on when you touch the metal door handle.
8
votes
3answers
2k views

Upgrading an Arduino Duemilanove from ATMega168 to ATMega328

I have purchased an ATMega328 from SparkFun with the Arduino bootloader pre-programmed. My intention is to replace the ATMega168 I currently have in my Duemilanove. Is this as simple as swapping the ...
10
votes
5answers
5k views

Arduino as AVR Programmer

Can you use the Arduino as an AVR programmer?
12
votes
3answers
8k views

How to Sleep Arduino

How do you program a sleep mode for your Arduino? Especially for battery powered designs, what are good techniques for sleeping the CPU but waking up only when needed?
3
votes
1answer
704 views

Arduino BT (bluetooth) Boot Loader

How do you burn the Arduino Boot Loader onto the Arduino BT?
3
votes
2answers
614 views

Software package for interfacing Arduino with MAX MSP?

What is a good software package for interfacing Arduino's input pins to MAX/MSP?
2
votes
2answers
2k views

Applescript and Arduino

How do you control an Arduino using Applescript?
4
votes
4answers
4k views

Analogue Gauge with Arduino

How do you make / connect an Analogue gauge with Arduino?
4
votes
3answers
4k views

Correct DC Adapter type to use for Arduino

What's the correct DC adapter to use with an Arduino? Voltage, etc.?
4
votes
2answers
976 views

Arduino Twitter

How do you send a tweet via Arduino using an Arduino Ethernet Shield?
12
votes
3answers
12k views

VGA Output from Arduino

Is there any method to output VGA with Arduino?
8
votes
3answers
9k views

Watch Dog Timer + Arduino

How do I setup a hardware watch dog timer with an Arduino?
5
votes
2answers
4k views

How do you read newer HDD motors (DC/Brushless) into arduino? (like stepper motors)

We had a version of the HDDJ working with an arduino reading an old stepper motor (with 4 wires), then sending serial data to processing, using a midi library, and midiox + midiyoke. Having trouble ...
6
votes
4answers
1k views

How can you get the analogue sensor data into Max MSP?

How can you get the analogue sensor data into Max MSP with an Arduino?
11
votes
3answers
5k views

Arduino Stepper Motor

How do use use an Arduino with a Stepper Motor?