PWM Signal Analyzer for Arduino Uno/Nano Author: Cyberponk V0.1 19/01/2017

For those who need to analyze a PWM signal for its characteristics, this tool might help.

Measures frequency from 0,001863 Hz (at 50% duty cycle and overflow counter on)
				   up to  105263 Hz (at 50% duty cycle and overflow counter off)
Measures high, low and total pulse time
Measures PWM duty in %
Measures PWM output value from 0 to 255 (arduino PWM)

In the absense of pulsed signals:

Measures voltage (assuming the correct voltage divider resistors are used)
Measures digital HIGH or LOW signal

Uses LCD Keypad Shield with LCD 1602 display and buttons.
Up/Down buttons to switch between different information pages
Select button to pause reading and freeze information on screen
Left/Right buttons to +- pwm output on PWM output pin

Pins:

Pin D2 and A1	-> PWM or Frequency and Digital/Analog Input (connect both pins)
Pin 11			-> 5V PWM Output