354 PWM-Analyser

354 : PWM-Analyser

Design render
  • Author: Pauline Kreis, Muhammad Saim Bilal
  • Description: Analyses PWM signal and delivers duty Cycle and frequency measurements on a 7-segment display
  • GitHub repository
  • Open in 3D viewer
  • Clock: 62500000 Hz

How it works

This project is meant to analyse the key characteristics of an input PWM signal, namely its duty cycle and frequency. It outputs these characteristics to a 4-digit 7-segment LED display. An additional mode-switch signal can be used to toggle what property is being displayed, LO: Duty Cycle, HI: Frequency. The frequency counter module is designed for measuring frequencies between 1 and 9999 KHz, any lower or higher frequency signal shall result in a LO or HI message on the Display. If the PWM signal is faulty and stays constant for too long the the frequency display shall output an ERR message.

How to test

This design can be tested using another either a microcontroller or signal generator to generate a PWM signal. Please note that the voltage of said signal is appropriate so as to not destroy the device.

External hardware

  • 4-digit 7-segment display with decimal point
  • A PWM Signal Source

IO

#InputOutputBidirectional
0PWM_INPUTGDIGIT_EN_3
1MODE_SWITCHFDIGIT_EN_2
2NCEDIGIT_EN_1
3NCDDIGIT_EN_0
4NCCNC
5NCBNC
6NCANC
7NCDPNC

Chip location

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