Arduino newsletter

Top new questions this week:

How to add the Wiring S board to Arduino IDE v.1.6.2?

My Arduino Uno is running out of memory to support my script (yes, I've tried several ways of optimize it already: PROGMEM, EEPROM, no Strings, and so on), so I would like to upload my script to my ...

arduino-uno sketch sketch-size

asked by gcarrillo 2 votes

Remove unused boards from Arduino IDE

In the current project I'm programming simultaneously an UNO board and a Leonardo one. Switching back and forth between the two boards in the Tools menu takes too much time because of the other 18 ...

arduino-ide

asked by LoganBlades 2 votes answered by LoganBlades 4 votes

Arduino UNO capacitive sensor not working

This is a visualization of my Arduino connections: I wish to read the data using the Capacitive sensor Library. iv'e tried the following code but variables total1, total2, total3 always have the ...

arduino-uno

asked by lukassz 2 votes

Millis() function with a button press

I am trying to use the millis() function to turn on a pin for a specified interval then turn off and turn on a second pin. It is intended to power a relay and offer a visual cue to when the cycle is ...

millis

asked by HiWay 1 vote answered by Russell McMahon -2 votes

Is it possible to use two encoders with Arduino Uno?

I would like to control 2 motors with the Arduino Uno board, which provides only two interrupt pins on digital 2 and 3. I've set one encoder using these pins, and it works. What do you think about ...

arduino-uno motor analogread timers rotary-encoder

asked by narutov6 1 vote answered by Spiked3 1 vote

Can I damage an arduino by setting pins high with no load

I have an Arduino project that has 15 different output pins set. Some are currently attached to devices and others are not. Will testing my program cause a problem / damage if it sets pints to HIGH ...

pins

asked by Hoytman 1 vote answered by BrettAM 5 votes

Control Speed of DC FAN Using Arduino PID Library

I want to make a circuit that control speed of DC fan Using Arduino PID Library to get thing at specific temperature. The circuit looks like this but can be changed, The dc fan motor connected to ...

arduino-uno arduino-mega motor pwm

asked by ANKIT JAIN 1 vote

Greatest hits from previous weeks:

Sensor for underground water tank level

In a similar way to the question "best way to determine if a 5 gallon water jug is getting empty", I'm looking for a way to measure water in a container. This is so it can be connected to an Arduino ...

sensors

asked by Rob Hoare 5 votes answered by Cybergibbons 6 votes

Can I program for Arduino without having a real board?

I would like to start the development of some basic Arduino projects but I don't own an Arduino board yet. Is there a way I can write my code and emulate/test it using a desktop computer so after my ...

emulation testing

asked by totymedli 45 votes answered by Anindo Ghosh 33 votes

Can you answer these?

Using interrrupts with RC522

I have a project using the RC522 RFID module with my Arduino Uno board and miguelbalboa's rfid library. The example code and every other code I find on the internet work pooling the device in order to ...

arduino-uno rfid

asked by Gustavo Sgarbi Campos 1 vote

Arduino Motor Shield and Adafruit CC3000 WiFi Shield Compatibility

My question is similar to this one: Motor shield and wireless transceiver compete for same pins But not exactly the same! I would like to know if the solution is as practical, though. I have an ...

shields wifi arduino-motor-shield adafruit

asked by bladepanthera 1 vote

Arduino Uno (master) and ATTiny85 (slave) I2C connection not working

I am trying to send and receive data using I2C between an Arduino Uno and an ATTiny85. The Arduino Uno is using the Wire library. The ATTiny85 is using the TinyWire library and is programmed (and ...

arduino-uno i2c attiny wire-library

asked by ma_uk 1 vote