Introduction: Negative Going Pulse Arduino Readable Logic. Hey Guys, Today we will show you how to create a very simple negative going pulse, readable to the arduino, that will not fry your arduino. This Circuit was very helpful for protection from high lethal voltages for any electronics. We are using this in a cosmic ray detector, but we decided to share the design so that others can use it too. Submitted by Newton Labs for the Instructables Sponsorship ProgramStep 1: The Circuit. Follow the circuit diagram to build the circuit. Step 2: Enjoy! Enjoy your Negative going pulse that wont fry your arduino. If you have any questions post them on the comment wall.