This water sculpture can stop drops of water in mid-air. This is accomplished by flashing LEDs to illuminate the droplets at just the right time. But it’s not limited to blinky lights alone. … ...

LED flashes are pretty much one cycle of a square wave. To measure both types of flash speed, [Matt] used a $0.50 photodiode an a 3.5mm jack that ties into the flash remote.

If the upload is working, you should see the RX and TX lights on the Arduino flash - and then your program will start to run. Congratulations - you've just developed a stand-alone electronic gadget.

This repository contains a minimal example of building and flashing a Hello World program on the Arduino Uno (Atmega329p). It utilizes cmake-avr as CMake cross-compilation toolchain. Additionally, set ...