Hello World! Pure Carbon here and today I will be showing you how to make an extremely simple game that can be played on an LCD Button Shield for Arduino. Unfortunately its not actually a game because all you will be able to do is make a character walk back and forth using the buttons on the shield and in order for something to be considered a game in my opinion there need to be some sort of objective or goal to work towards. The sketch that I created was modified from the example code that can be found here. I made a video going through the code where I explain what everything does, so enjoy you silly humans!

Hi, with this instructable I want to show you an open source pendulum that can compute and process the measured oscillation period to find the gravitational acceleration of the earth (~9,8 m/s²)! It's the most powerful of all, discover it!
The project is based on the Arduino platform, but it contains a DIY PCB. The structure is made from an AutoCAD 2016 drawing that has been laser cutted. If you haven't got a ball, there's a 3D-printed ball file in my site.
To check the position of the ball I used three infrared break beam sensors from Sparkfun (tutorial): they are really sensitive but they can't work with a lot of light (if they don't work anything, turn off the lights in your room).
You can download all the files and view them using the preview function in my site.

This Instructable documents how to create a simple heart rate monitor using Photoplethysmography with an IR phototransistor via transmissive absorption using the Arduino to process the pulsatile data and display live results via a TFT screen.
To use the source code and create the necessary circuitry you will need a reasonable grasp of electronics, knowledge of the Arduino, a DMM and some patience.
The design has been optimised to work with easily obtainable 'off the shelf' commercial parts and re-purposed household items and gives reasonable results.