Arduino

Arduino is an open-source physical computing platform designed to make experimenting with electronics more fun and intuitive. Arduino has its own unique, simplified programming language, a vast support network, and thousands of potential uses, making it the perfect platform for both beginner and advanced DIY enthusiasts

Circuit One

Here is a light that flashes, it turns on for 200 milliseconds, and then turns off for 800 milliseconds, and flashes like this in a continuous loop.

Circuit Two

Circuit Three

Circuit Four 

Circuit Five

Circuit Six

Circuit Seven

Circuit Eight

Circuit Nine

Circuit Ten

Circuit Eleven

Circuit Twelve