Introduction to Electronics – Filters (Web ebook Subscription) – Tech Explorations

Course Content

Book information 2 Lectures

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Table of contents

Review of software and hardware tools used 2 Lectures

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Course Overview and Objectives

Review of software and hardware tools used

What is a filter? 4 Lectures

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Introduction to filters

First-order filters in real life applications

The four filters: low-pass, high-pass, band-pass, band-stop

Example: Compare a filtered and unfiltered signal

Dive into first order RC and RL filters 16 Lectures

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What is a first-order filter?

RC low-pass filter bevaviour

RC high-pass filter behaviour

RL low-pass filter behaviour

RL high-pass behaviour

Voltage division in AC using reactance

Cutoff frequency

Step response of first-order filters

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Filter analysis with Bode plots and phasors 8 Lectures

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Introduction to filter analysis with Bode plots and Phasors

What is a Bode plot?

Example Bode plots

What are phasors?

Example phasor plots

Activity 1: Calculate component

Activity 2: Design an RL high-pass filter

Activity 3: Bode and phasor plot from measurement

Filter applications 18 Lectures

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Activity 1: Time constant experiment

Impact of time constant on signal shape

Activity 2: Impact of the time constant on signal shape

Audio tone shaping

Activity 3: Hear the effect of filtering

Sensor signal conditioning

Activity 4: A noisy light sensor with a filter

Noise filtering

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Cascading Filters and Filter Types 8 Lectures

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Why cascade filters?

Cascading RC filters and second-order behaviour

Activity 1: Cadcading RC filters on the breadboard

Band-pass filter

Activity 2: Band-pass filter on the breadboard

Filter design constraints: loading, attenuation, bandwidth

Activity 3: Design a two-stage filter to isolate a frequency band

Activity 4: Simulate cascaded filters with varying cutoff frequencies

A primer on Python for filter analysis 7 Lectures

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Why use Python to learn electronics?

Set up the Python environment

Python fundamentals for electronics simulations

Essential NumPy for electronics

Visualisation with Matplotlib

Understanding and modifying electronics simulation scripts

Additional resources

A primer of algebra for first-order filter analysis 9 Lectures

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Algebra in filter analysis

Rearranging equations

Ratios and proportions

Manipulating fractions

Powers and roots

Complex numbers

Frequency, angular frequency, and substitution

Quick guide to simplifying transfer functions