BUILD a voltmeter

OBJECTIVE The objective of this project is a build a voltmeter that can measure voltages between 0 and 30V. I will use the analog inputs of an Arduino to measure the voltage, via a voltage divider. When an Arduino is powered from a 5V supply the maximum voltage that could be measured is 5V. However,…

BUILD a frequency counter

THE OBJECTIVE Our objective is to build a frequency counter that can identify frequencies up to 1MHz. pulseIn() pulseIn() reads a pulse on a pin and waits for a change from HIGH to LOW or LOW to HIGH. This works with times that are between 10μs and 180s. You can provide either two or three…