Questions tagged [arduino]
Be sure to use the Arduino Stack Exchange for questions that are more Arduino and less electronics.
9,008
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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 ...
- 403
14
votes
8
answers
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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 ...
- 5,070
38
votes
4
answers
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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. ...
- 4,819
11
votes
5
answers
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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 ...
- 602
6
votes
1
answer
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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 ...
- 5,070
12
votes
7
answers
2k
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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 ...
- 2,529
8
votes
5
answers
1k
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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 ...
- 5,070
7
votes
6
answers
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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 ...
- 235
3
votes
4
answers
5k
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21
votes
9
answers
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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 ...
- 753
4
votes
3
answers
2k
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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?
- 1,561
2
votes
2
answers
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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 ...
- 21
5
votes
7
answers
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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,
Joel
2
votes
1
answer
3k
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9
votes
7
answers
16k
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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 ...
Fly
7
votes
3
answers
2k
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Arduino Bootloader
If I upgrade my arduino from the ATMega168 to ATMega328 will I be able to use the ATMega168 like a stock chip from the factory or will the bootloader prohibit this? In other words, will I be able to ...
- 575
3
votes
3
answers
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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?
- 5,070
9
votes
5
answers
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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 ...
Or Goshen
3
votes
1
answer
1k
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ATMega chips come with the Arduino bootloader
Do the Arduino Duemilanove USB Board with Atmega328 come with the Arduino bootloader?
- 5,070
9
votes
4
answers
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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?
- 555
8
votes
6
answers
5k
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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 ...
- 4,819
23
votes
3
answers
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JTAG debugging AVR
Can anyone advise what hardware and software is required for debugging AVR in circuits?
- 4,819
-1
votes
1
answer
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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 ...
Martin
8
votes
1
answer
10k
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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 ...
10
votes
3
answers
4k
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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?
- 4,717
9
votes
2
answers
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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.
Vic
6
votes
7
answers
7k
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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 ...
- 1,561
7
votes
6
answers
1k
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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.
- 5,070
11
votes
3
answers
2k
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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.
...
- 2,301
15
votes
3
answers
8k
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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 ...
- 1,657
8
votes
8
answers
6k
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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?
- 5,070
7
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5
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1k
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5
votes
3
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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 ...
- 5,070
4
votes
6
answers
2k
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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 ...
- 5,070
3
votes
3
answers
444
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Using a Wii Nunchuck for data collection
Anyone got a good tutorial on using and Arduino to capture the Wii Nunchuck accelerometer data?
- 5,070
30
votes
6
answers
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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?
- 1,657
19
votes
8
answers
9k
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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: ...
- 441
15
votes
7
answers
72k
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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 ...
- 5,070
6
votes
2
answers
1k
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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 ...
- 4,717
13
votes
7
answers
7k
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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?
- 549
14
votes
2
answers
23k
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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 ...
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41
votes
8
answers
317k
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Saving Arduino sensor data to a text file
How can I save data retrieved from a sensor to a text file on the computer?
- 549
8
votes
1
answer
4k
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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 ...
- 4,717
10
votes
6
answers
3k
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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.
- 4,717
8
votes
3
answers
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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 ...
- 1,829
10
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5
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5k
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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?
- 4,717
4
votes
1
answer
740
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Arduino BT (bluetooth) Boot Loader
How do you burn the Arduino Boot Loader onto the Arduino BT?
- 4,717
4
votes
2
answers
666
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Software package for interfacing Arduino with MAX MSP?
What is a good software package for interfacing Arduino's input pins to MAX/MSP?
- 4,717
3
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2
answers
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