Most Popular
1500 questions
4
votes
5 answers
Why do I get avrdude: stk500v2_ReceiveMessage(): timeout error when uploading to Arduino Mega?
I have an Arduino Mega clone and I haven't used it for a while. I remember it not working so when I plugged it in and tried uploading the code to it and sure enough it didn't work. So I plugged in an Uno and it worked. The Mega is a 2560 Atmel.…
techset
- 59
- 1
- 1
- 6
4
votes
3 answers
Powering up LED strip - How many amps?
I want my Arduino to drive a LED strip.
The LED strip in particular is the 3528 non-waterproof type.
To power this up, I need a 12V power supply.
My LED strip is going to be 5 meters.
Now my questions are:
Is it important on how many amps, my…
user1584421
- 1,425
- 3
- 26
- 36
4
votes
1 answer
Huge nested loop in Arduino
I am completely new to programming and I am trying a brute force programming on my garage door opener. I want to use an Arduino for learning purposes. I wrote the following program that finally did what it should and now I am wondering whether there…
AndreasL
- 41
- 1
4
votes
4 answers
How useful could the Arduino Yun be in computer vision in a robotics project?
I've recently ordered an Arduino Yun and several other components to begin on a small robotics project (based on an old 4x4 RC Truck). Although not mandatory for what I'd like to do, I was wondering how feasible it would be to mount a small camera…
cnsumner
- 193
- 1
- 7
4
votes
1 answer
Arduino Uno as keyboard
I am trying to make Arduino Uno to act as a keyboard. I have successfully flashed the USB-HID firmware in it using this link also and programmed it like this.
uint8_t buf[8] = {
0
};
int inpin1 = 7;
int inpin2 = 8;
int val1 = 0;
int val2 =…
Mayank Pal
- 41
- 1
- 4
4
votes
1 answer
How to fix compilation error for tone() using same timer as other function
I am trying to integrate tone() with the open source program for the Amped heart rate monitor. The error:
Tone.cpp.o (symbol from plugin): In function `timer0_pin_port':
(.text+0x0): multiple definition of…
rur2641
- 291
- 1
- 3
- 10
4
votes
2 answers
Equivalent for PORTB in Arduino Mega 2560
Like I said in the subject, I would like to know the equivalent for the instruction:
PORTB |= 0x01;
PORTB &= ~0x01;
More precisely I was using it to trigger a fast pulse conversion on my shield-ADC on an Arduino Uno. Now I am using an Arduino Mega…
Francesco Pegoraro
- 167
- 3
- 9
4
votes
1 answer
How to convert Arduino example sketch to a complete c++ project?
I'm experimenting something new with my Arduino Leonardo. I removed its original bootloader and flashed it with LUFA mass storage example with added functionalities(now its a firmware). I'm trying to now add RFID reader(read/write) example to my…
Isuru
- 151
- 1
- 1
- 8
4
votes
1 answer
Flash String Helper object as variable
So I have a Bunch of commonly used char arrays to build commands in my library.
So to preserve memory, I have them put into flash, via PROGMEM ext,
typedef const char PROGMEM ProgChar;
ProgChar AT[] = "AT";
ProgChar AT_RST[] = "RST";
Then in my…
Steven Venham
- 161
- 7
4
votes
2 answers
Multiple tones with one piezo buzzer
I have figured out how to make a piezo buzzer play two tones at once with analogWrite() and tone() but how would I make an actual song by playing both bass and treble, such as this one. Here is the circuit I had to do it:
and here is the code I had…
user29569
4
votes
4 answers
Any problems taking arduino(esque) devices through airport security?
I'm flying out for vacation, and I want to take some of my half-done arduino projects with me to work on. I'm concerned that aiprort security might mistake my devices for something sinister or at bare minimum 'suspicious' and be confiscated.
Has…
Paul
- 371
- 4
- 16
4
votes
1 answer
How is the bootloader activated when device is running?
For the sake of specificity I am referencing my question to Arduino. It applies to all AVRs with hardware USB and a bootloader though.
The bootloader is capable of receiving new program data over the USB interface, and, after programming, releases…
polwel
4
votes
2 answers
No valid serial ports for Arduino UNO on Mac
UPDATE: The issue turned out to be with my work laptop. Our IT department has them configured in such a way that the assignment of serial ports is different somehow. When I plugged in on my personal Macbook Pro it all worked perfectly.
I just got…
Jonathan Miller
- 151
- 1
- 6
4
votes
1 answer
Leonardo-based tachometer?
I'm new here. I'm not a native speaker, so pardon my English.
I just received my Arduino Leonardo today. I tried some basic calculations and stuff like blinking and LCD interfacing. Its interesting.
I am now trying to make a tachometer with the…
x0x
- 149
- 4
4
votes
3 answers
Connect 9 V battery to Arduino Mega 2560 directly?
Is it safe to connect a 9 volt battery to an Arduino Mega 2560 directly to power it?
Waqas
- 41
- 1
- 4