Ettronics Hightech

Ettronics Hightech Welcome to Ettronics Hightech Limited
A platform dedicated to hands-on training in practical electronics and hardware technology.

Our flagship course "Practical Electronics Circuit Design" is out for enrolment.

09/08/2026

The Ettronics Hightech Arduino Kit. Send us a DM to get yours.

02/08/2026

Welcome to Part 3 of the Coding with Arduino for Beginners series!

In this lesson, you'll build your first real electronic circuit from scratch using a battery, breadboard, LED, resistor, switch, and jumper wires. You'll also learn how to read a simple circuit diagram and convert it into a working physical circuit.

This is an exciting milestone because you'll see your first circuit come to life by turning an LED ON and OFF with a switch—just like professional engineers do when testing new electronic designs.

In this lesson, you'll learn:

✅How to read a simple circuit diagram (schematic)
✅How electronic symbols represent real components
✅How to build your first electronic circuit on a breadboard
✅How to connect a battery, resistor, LED, and switch correctly
✅The difference between an open circuit and a closed circuit
✅Why LED and battery polarity is important
✅How electricity flows through a complete circuit
✅How to test your circuit
✅Basic troubleshooting techniques for circuits that don't work
✅Troubleshooting a faulty circuit

If your LED doesn't light up, you'll learn how to check:

✅Component placement on the breadboard
✅Battery polarity
✅LED polarity
✅Jumper wire connections
✅Faulty jumper wires
✅Faulty LEDs

These troubleshooting skills are essential for every electronics beginner and will help you solve problems confidently as your projects become more advanced.

Components Used

✅Breadboard
✅9V Battery and Battery Clip
✅LED (Light Emitting Diode)
✅Resistor
✅Push Button Switch
✅Male-to-Male Jumper Wires

By the end of this lesson, you'll have successfully built your first working electronic circuit and gained the confidence to start creating even more exciting projects.

Coming Up Next

In Part 4, we'll replace the battery with an Arduino Uno, write our first Arduino program, and make an LED blink using code. This is where electronics meets programming!

If you would like your child to receive personalized tutoriang in STEM, coding, electronics, or Arduino programming, send me a DM.
We have Arduino learning kit used in this course available to students. If you are interested in obtaining a kit or learning more about the program, feel free to send me a message.

02/08/2026

Welcome to Part 2 of the Coding with Arduino for Beginners series!

Before writing our first Arduino program, it's important to understand the basic electronic components that make every circuit work. In this lesson, you'll learn the fundamentals of electricity and become familiar with the components you'll use to build your very first Arduino project.

This beginner-friendly lesson is perfect for students, hobbyists, makers, and anyone starting their journey into Arduino, electronics, and robotics.

In this lesson, you'll learn:

✅What electricity is
✅What an electric circuit is
✅The difference between an open circuit and a closed circuit
✅How a battery powers electronic circuits
✅How a breadboard is arranged and connected
✅How jumper wires connect components
✅The parts and polarity of an LED (Light Emitting Diode)
✅What a resistor does and why it protects electronic components
✅The unit of resistance (Ohms)
✅How a switch turns a circuit ON and OFF

By the end of this lesson, you'll understand the purpose of each component and be ready to build your first electronic circuit in the next video.

What You'll Need

✅Breadboard
✅LEDs
✅Resistors
✅Jumper wires
✅Battery
✅Push button switch

In the next lesson, we'll connect all these components together and build our first working electronic project before we begin programming with Arduino.

If you would like your child to receive personalized tutoriang in STEM, coding, electronics, or Arduino programming, send me a DM.
We have Arduino learning kit used in this course available to students. If you are interested in obtaining a kit or learning more about the program, feel free to send me a message.

26/07/2026

To parents that asked me to create something for their kids, I'm making it already.

This course is designed for children and absolute beginners (ages 8+) who want to learn coding, electronics, and Arduino through simple explanations and hands-on projects.

To make STEM education more accessible, I have made the course completely free. You can access the available units on YouTube using the link the comments.

I upload at least one new lesson every week, so be sure to subscribe and follow along as we explore the exciting world of coding and electronics together.

If you would like your child to receive personalized guidance in STEM, coding, electronics, or Arduino programming, I would be happy to help.

I also make the Arduino learning kit used in this course available to students. If you are interested in obtaining a kit or learning more about the program, feel free to send me a message.










08/05/2026

This Game is a tactile alphabet puzzle game for the blind designed to support accessible learning and early literacy.

This interactive educationaltool features puzzle pieces shaped like the letters of the English alphabet.

When each piece is correctly placed into its
matching slot, the system plays the
corresponding letter sound, helping users learn through touch and audio feedback.

Ideal for visually impaired children and beginners, this accessible alphabet learning game enhances letter recognition, phonics skills, and sensory development in a fun and engaging way.





20/04/2026

Have you ever wondered why a single press of your laptop’s power button is enough to turn it on? Why not a long press?
In this beginner-friendly electronics tutorial, we break down the real reason behind this — and it all comes down to a fundamental concept in digital electronics: pull-up and pull-down resistors.
In this video, you’ll learn:
✅What a floating GPIO pin is and why it causes problems
✅How electrical noise and interference can trigger circuits unexpectedly
✅How a pull-up resistor stabilizes a circuit
✅Why resistors are essential to prevent short circuits
✅The difference between pull-up vs pull-down resistor circuits
✅How this concept applies to real devices like your laptop's power button
✅A practical demonstration using a microcontroller, LED, and oscilloscope

You will also see a real-life experiment where removing the pull-up resistor causes erratic behavior due to environmental electrical noise (including 50Hz AC interference), and how adding it fixes the issue instantly.

By the end of this tutorial, you’ll clearly understand:

✔ Why one click is enough to power on your laptop
✔ How microcontrollers detect button presses
✔ How to design stable, noise-resistant circuits

Want to Learn Practical Electronics from Scratch?
Check the link in the description or comment section to access a full beginner-to-advanced course on electronic circuit design.

12/04/2026

If you’re starting with electronics or Arduino, you’ve probably heard the terms current sourcing and current sinking… and got totally confused.
This quick video makes it super easy to understand:

Sourcing = the device gives current to the load
Sinking = the device takes current from the load

With clear examples so you’ll never mix them up again!

Link to my course: https://ettronics.com/product/practical-electronics-circuit-design/

What is "Voltage Droop"?You build a simple LED circuit on a breadboard, it works perfectly. The LED shines bright and st...
28/03/2026

What is "Voltage Droop"?

You build a simple LED circuit on a breadboard, it works perfectly. The LED shines bright and steady.

But suddenly, when you add more components, turn on a switch, or the circuit starts doing more work, the voltage dips for a moment, the LED flickers, or your project becomes unstable.

Most designers know about IR Drop, the steady voltage loss caused by resistance in wires or connections (Voltage = Current × Resistance).

But many don’t realize there’s a closely related and sneakier problem called "Voltage Droop".

"Voltage Droop" is the sudden, temporary drop in supply voltage that happens when your circuit quickly demands more current, for example, when multiple parts switch on at the same time.

Simple analogy:
Think of a garden hose supplying water to your plants.
IR Drop = pressure slowly decreasing as water travels through a long, narrow hose.

"Voltage Droop" = pressure suddenly crashing when you turn on many sprinklers at once and the hose can’t supply water fast enough.

This is why a circuit that works fine on the breadboard can suddenly misbehave when it gets busier.

How to Fix or Reduce Voltage Droop:
1. Keep power and ground wires as short and thick as possible.
2. Place decoupling capacitors (like 0.1µF ceramic) right next to the power pins of every chip or IC, they act like tiny local batteries that supply quick bursts of current during sudden demands.
3. Use bigger electrolytic capacitors near the main power entry point.
Avoid long, thin jumper wires when possible, they increase both IR drop and droop.
4. In more advanced builds, add multiple parallel paths for power.

Understanding both IR Drop and Voltage Droop will make your circuits much more stable and reliable, whether you’re on a breadboard, perfboard, or designing a full PCB.

Have you ever experienced mysterious flickering, resets, or instability in a circuit that worked fine when tested slowly? That might have been voltage droop at work.

Drop your experiences or questions in the comments 👇

To learn practical electronics as an absolute beginner, check out our course with the link in the comments section.

Here’s the insight most designers learn the hard way:A PCB can pass clearance requirements on paper, but still fail in r...
26/03/2026

Here’s the insight most designers learn the hard way:

A PCB can pass clearance requirements on paper, but still fail in real life because contamination (dust, humidity, flux residue) creates a conductive path along the surface, effectively shrinking your creepage distance over time.

That’s why experienced designers don’t just “space things apart”, they engineer the surface path:
They add isolation slots to stretch creepage without increasing board size
They consider pollution degree (especially for products used in humid or dusty environments).

They select materials with better CTI (Comparative Tracking Index)
And they treat solder mask as unreliable insulation, not a safety barrier

The real takeaway:
Clearance protects against instant failure (arcing), but creepage protects against slow, inevitable failure (tracking).

If your design is going global or long-life (industrial, power electronics, IoT in harsh environments), creepage is usually the silent killer.

To learn "practical electronics circuit design" from scratch as an absolute beginner, check out our course on that with the link in the comments section.

Address

Suite 110 Bethel Plaza, 117 Shasha Road
Lagos
100272

Opening Hours

Monday 09:00 - 17:00
Tuesday 09:00 - 17:00
Wednesday 09:00 - 17:00
Thursday 09:00 - 21:00
Friday 09:00 - 17:00

Telephone

+2349030295926

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