In this lesson we will discover how electricity works
Key Take aways
Describe a Conductor
Describe a Insulator
Conventional Current VS Electron Flow
Why understanding electricity is one of the most profitable skills for a modern vehicle technician:
Modern vehicles are packed with electronics — sensors, ECUs, CAN networks, modules, and wiring make up most faults today. Mechanics who understand how electricity flows, how circuits work, and how to test them properly can fix problems others can’t.

While many shops just replace parts, a technician with good electrical skills can find the real fault, fix it right the first time, and charge for real expertise — not guesswork. This makes you faster, trusted, and far more valuable — which means more jobs, better pay, and fewer comebacks.
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Using AI to Make Learning Easier

How Electricity works

Electrical Current Explained

Worksheet

Why understanding induction is so important in vehicles:
Induction is the principle of generating voltage using a magnetic field — it’s the foundation of how alternators, ignition coils, crank sensors, and even transponder keys work (they’re powered wirelessly by induction). Without induction, there’s no charging system, no spark, no accurate sensor signals, and no modern anti-theft systems.

If you understand induction, you can diagnose no-spark faults, charging issues, sensor signals, and key communication problems correctly. If you don’t, you’ll struggle to fix no-starts or charging faults — even with the best tools.



Inductors Explained

This chapter introduces relays as electrically operated switches, covering both electromechanical
and solid-state types. You’ll explore configurations like normally open, normally closed, latching,
and double throw relays. Practical lessons highlight how relays protect ECUs, why diode/resistor
protection is essential, and how choosing the wrong relay can cause ECU damage or fault codes.

https://www.youtube.com/watch?v=n594CkrP6xE&t=230s

Relays Explained

Chapter: Transformers Explained
In this chapter, you’ll learn how transformers transfer energy using electromagnetic induction and why they are essential in both everyday electronics and modern vehicles. We’ll cover step-up and step-down transformers, how they reduce energy loss, and their role in automotive ECUs. Most importantly, you’ll discover how certain ECUs use step-up transformers to generate the high voltage needed to drive fuel injectors and ignition systems.

https://www.youtube.com/watch?v=jcY4QN7awEc&t=2s

Transformers Explained

Targeted Knowledge?
Series Parallel Circuits
Resistance 
Power 
Current
Dont focus too much on the calculations we have various calculators to help with that

Ohms Law Explained

Resistors Explained

How Potentiometer Works

Why understanding diodes is important (especially in vehicles):

Basic function: A diode allows current to flow in only one direction. It blocks current in the opposite direction.

Practical role in vehicles: Diodes are often hidden inside wiring harnesses, ECUs, or circuit boards to protect sensitive electronics. For example, some cars have diodes to stop damage if someone accidentally connects the battery backwards — the diode blocks or redirects reverse current that could fry ECUs or sensors.

Other uses: Diodes are also used for things like suppressing voltage spikes from relays or injectors (flyback diodes), ensuring current flows the right way in indicator circuits, or isolating circuits to prevent backfeeding.

Key point: If you don’t understand how diodes work, you can easily misdiagnose electrical issues or fail to spot a hidden protection component in the harness. Knowing how to test a diode properly (forward vs. reverse) is essential for modern automotive diagnostics and rep

Diodes Explained

Why understanding transistors is important:
Transistors act as electronic switches and amplifiers — they’re the reason modern computers and ECUs work. In vehicles, transistors switch injectors, control relays, fans, and boost sensor signals. Many “ECU faults” are just failed transistors. Knowing how they work and how to test them saves time, money, and prevents wrong part replacements.

Transistors Explained



Why understanding capacitors is important (especially in vehicles):

Basic function: A capacitor stores and releases electrical energy. It can smooth out voltage spikes, filter noise, or provide a quick burst of power.

Practical role in vehicles: Capacitors are found in ECUs, radios, alternators, ignition systems, and sensors. For example, they help stabilize voltage to protect sensitive electronics from sudden drops or spikes. Some capacitors filter out electrical noise so signals stay clean (important for things like radio, sensors, and CAN lines).

Example: If you unplug a component and see a spark or get a stored charge shock — that’s a capacitor discharging. Also, some ignition systems use capacitors to store and release high-voltage pulses for spark generation (like in CDI systems).

Key point: If you don’t understand capacitors, you might miss faults like a bad capacitor

Capacitors Explained

Contents:

1	What is electronics?
1.1	Introduction

2	Semiconductors
2.1	Introduction
2.2	Semiconductor components 
2.3	Doping 
2.4	NTC and PTC thermistors
2.5	Summary 

3	Diodes
3.1	Introduction
3.2	p-n junction
3.3	Types
3.4	Applications
3.5	Zener diodes
3.6	Light-emitting diodes
3.7	Summary

4	Transistors
4.1	Introduction
4.2	Structure
4.3	How bipolar junction transistors work
4.4	Controlling actuators
4.5	Field-effect transistors
4.6	Summary

5	Integration of semiconductor components
5.1	Introduction
5.2	Integrated circuits
5.3	Control units
5.4	Vehicle electrical system
5.5	Summary

6	Test


Electronics overview

This short course is designed for mechanics and auto electricians who want to master DC-DC converters and their role in modern automotive electrical systems. You’ll learn:
✅ How buck converters (step-down) and boost converters (step-up) work
✅ Key components (inductors, capacitors, MOSFETs, resistors) and their roles
✅ Real-world applications in electric & hybrid vehicles (battery systems, LED drivers, etc.)
✅ Troubleshooting common issues

By the end, you’ll confidently identify, test, and understand these critical circuits in today’s vehicles.

Understanding Buck & Boost Converters

DC to Dc Converters continued

Understanding the basics of computers will allow the modern vehicle technician to better understand the complexities of vehicle control units. Our computers are also one of the most important tools. This basic lesson will serve as a primer to lay the foundation for u to build your computer skills upon.

Introducing Modern Computers

Introduction to Computers

We are going to use a Arduino to show you digital controls work, this will assist you in understanding how vehicle ECUs work

Introduction to Arduino

Arduino Basics & Digital Electronics

In This Project we start by building a polo 9n Test Platform.
We will Use this to apply Knowledge learnt like Bosch Terminal Designations 
Reading a Wiring diagram basics
Basic Diagnostics

Cluster Connections

OBD2Port

ECU Diagram CLPA

Project one Polo Test Platform

🚀 Autotronics for Beginners: From Multimeters to Microcontrollers🎯 Mechanics Auto Electricians Locksmiths + | 4-Week Hands-On CourseUnlock the world of automotive electronics and microcontroller programming with this beginner-friendly course! Whether you're a hobbyist, future engineer, or car enthusiast, Autronics for Beginners gives you the skills to understand, diagnose, and modify electronic systems—from basic circuits to car ECUs.---### 🔧 What’s Included?✔ Tools Needed:- Multimeter- Arduino UNO Kit (includes UNO, jumper wires, LEDs, MOSFETs, resistors, breadboard, sensors, small fan, etc.)- Basic Windows PC/Laptop<ul><li style="color: rgb(0, 0, 0);">Soldering Hot Air Station</li></ul>- Flash drive with Windows 7/10 install files- Internet access (for YouTube tutorials &amp; AI tools)- PDF Workbook (generated for you)- Printer (for worksheets)✔ 4-Week Structured Learning:1️⃣ Week 1: Basic Electronics &amp; Multimeter Skills- Learn voltage, current, resistance- Test resistors, diodes, LEDs- Build simple breadboard circuits-Basic Soldering Skills2️⃣ Week 2: Computer Basics &amp; Windows Installation- Identify PC components (RAM, CPU, HDD, SSD)- Install Windows &amp; drivers- Understand USB power &amp; system settings3️⃣ Week 3: Arduino &amp; Digital Electronics- Control LEDs, fans with MOSFETs- Read sensor data &amp; use PWM- Bonus: ECU &amp; key coding basics (decode &amp; program ECUs!)4️⃣ Week 4: Auto Electrical &amp; AI-Assisted Diagnostics- Work with relays &amp; automotive sensors- Use AI (ChatGPT) to troubleshoot &amp; generate code- Final project: Sensor-controlled fan circuit---✔Optional Extra Tools: If you would like to follow along with the other lessons- KTAG Clone, UPA USB, VVDI Prog, BMW INPA Cable,&nbsp;- Vehicle-Specific Test Rigs (Polo 9n, VW MP9, Renault Sandero/Kwid, Chev Utility)✔ Exclusive Practical Exercises:- Decode &amp; tune BMW MS43, MP9, Polo 6 ECU- Program keys for Chev Cruze, Ford Bantam, Opel, Toyota- Build test platforms for real-world diagnostics<ul><li style="color: rgb(0, 0, 0);">Polo 9n</li></ul>Code Keys Decode 7GV Ecu introduction to scripts.<ul><li style="color: rgb(0, 0, 0);">Chev Utility</li></ul>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Create Test Rig Diagnose Lockset<ul><li style="color: rgb(0, 0, 0);">Opel Utility</li></ul>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Build Test Jig, find Pin ECU Cluster Code New ECU <ul><li style="color: rgb(0, 0, 0);">Np200 Renault Sandero</li></ul>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Decode Ems 3132 ECU	Test Common Failure in ECU Mosfets MELF Resistors---### 📦 What You Get✅ PDF Course Booklet (Daily breakdowns, worksheets, diagrams, mini-tests)✅ Printable Certificates After Passing Test✅ Hands-On Projects (Blink LEDs, control fans, decode ECUs, AI-assisted fixes)✅ ECU Decoding Script,ECU Decoding Files&nbsp;✅ Wiring Diagrams for Projects✅ Lifetime Access to Updates---### 🎓 Final Certification ProjectBuild a sensor-controlled fan circuit using Arduino + relay, then optimize it with AI!---### 🔥 Why Choose This Course?✔ No prior experience needed—start from scratch!✔ Learn real-world auto electrical &amp; coding skills✔ Use AI to supercharge your troubleshooting✔ Perfect for DIYers, future mechanics, or tech enthusiasts🛒 Enroll Now &amp; Start Your Autoronics Journey!I’m adding even more value for you over the next few days:✅ We’re launching an exclusive Facebook Group — here you’ll see videos of real practical assignments our techs are doing. You can even request videos if you want us to break something down step by step — so you never feel stuck.✅ I’m adding ECU Repair Cheat Sheets — right after the MOSFET and Transistor lessons. These will help you test and repair real modules faster.✅ Plus, I’m dropping a bonus module on PROFETs &amp; Smart MOSFETs — more and more ECUs and Body Control Modules use these. Knowing how to handle them opens up serious extra repair work.When you put all these lessons together, you’re not just learning — you’re unlocking a whole new world of income-generating skills.💡 Knowledge is power—get the skills to control electronics like a pro! <div class="iframe-wrapper"><iframe src="https://iframe.mediadelivery.net/embed/431082/823136f4-ac04-412e-b825-75ada795f345?autoplay=false" frameborder="0" allowfullscreen="true"></iframe></div>

Your Auto Tronics Journey starts here.
SA Residents prices for bank eft or card payments
This is a developing course
Week 1 R950 ends 5th July
Week 2 R1850 ends 12th July
Week 3 R3650  ends 19th July
Week 4 R7250 ends  26th July


Electro-Tech Level 1: From Multimeters to Microcontrollers

Jerome Martin

Course Details

Course content