Make an EC/pH/ORP/temperature sensor device to monitor water. Interact with it through a website using Bluetooth Low Energy.
Project tutorial by uFire
2 wire 8 channel Relay Module || Reduce your CPU workload by interface 74LS164N.
Project showcase by Boaz Lawnce
An Arduino Nano used as an IO expander on I2C for ESP8266. For example, add 8 digitals IO and 6 analog inputs.
Project tutorial by Joel Soranzo
Hacked MP3 player remote as DC motor driver.
This is a variation of the Light Theremin project from the starter kit and features components soldered onto a PCB.
Project tutorial by jbrandstater
Connect I2C Character LCD Display to Arduino and program it - quick and easy!
by Boian Mitov
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