Arduino newsletter

Top new questions this week:

Set EEPROM from PC before program

I have been working on an arduino program, which has gotten rather large. I am close to hitting the 32k limit on Flash for my ATmega328p. I would like lower my program size by saving some of my many ...

eeprom code-optimization flash

asked by riverrun 2 votes answered by Gerben 1 vote

How does if(serial) work, a c++ question

The Arduino documentation says if(Serial) always returns 1, except for the case where Leonardo USB serial connection delays becoming ready. (Leonardo has two USB IDs, and switches between them for ...

c++ arduino-ide attiny

asked by HiTechHiTouch 2 votes answered by Majenko 2 votes

How to increase voltage of Arduino?

Hey I'm very new to Arduino. I don't have very much knowledge in electrical engineering either. My project: an EL wire working on Arduino. Since the Arduino can only support 5V and the wire needs ...

arduino-uno voltage-level

asked by PraveenHarris 2 votes answered by Majenko 2 votes

A question about resistance measurement with arduino

Lately I was asking myself about the posibility of measuring a potentioneter resistance with arduino, and my questions are: 1) Is it possible? 2) if it's possible, what kind of restriction the ...

arduino-uno arduino-leonardo analogread potentiometer analogwrite

asked by Julio Orozco 1 vote answered by Majenko 3 votes

IDE 1.6.10 on LinuxMint 17.3 Cinnamon

When compiling I get the error 'as: unknown option »-mmcu=avr5« exit status 1' I succeeded now using your piece of advise. Thank you so much.

arduino-uno arduino-ide

asked by cuci 1 vote answered by Nithin Kurian 1 vote

LED bar graph script not working

I have LED bar graph on pins 2-11. Eventually I want to use a voltage divider to figure out the amount of voltage left in a power supply. Currently, this script should set the number of LEDs on the ...

led arduino-nano arduino-micro mathematics

asked by Alex 1 vote answered by Ignacio Vazquez-Abrams 4 votes

Powering multiple Arduino shields

To start, I am a software guy, so I am not too clued up on the electronics side of things. My question is: I have a number of Arduino shields and would like to power them with a portable power source, ...

power

asked by Calco 1 vote answered by Sanu - Open Maker 1 vote

Greatest hits from previous weeks:

Arduino Pro Micro, get data out of Tx pin?

I have a Sparkfun Arduino Pro Micro with an ATmega32u4 on it and a Roving Networks RN32 Bluetooth Module Theoretically, I should be able to solder the Rx of the Bluetooth to the Tx on the arduino and ...

serial arduino-pro-micro

asked by user3320919 2 votes answered by Chris Stratton 10 votes

How can I run multiple programs on an Arduino?

I'm trying to get students to experiment with Arduino. However, due to a lack of boards, two teams of students will collaborate on each board. They will push their own code (independent from each ...

system-design networking

asked by Giulio Muscarello 2 votes answered by Anonymous Penguin 4 votes

Can you answer this?

DIY electric reel lawn mower

https://www.youtube.com/watch?v=N-vr_Gbhrq0 I have a Fiskar mower and want to make it RC battery powered just like the one in the video. I am trying to use Arduino for the controller. The main ...

motor battery relay

asked by Gon 1 vote