MW Electronics Lab

🚀 Help me improve the visibility!

I want to make sure the circuit diagrams in my videos are as clear and easy to follow as possible. I’ve been using the Light Sky Blue (Option 3) for a while, but I want to know what you find easiest on the eyes.

Which background color makes the components and wiring stand out the best?

Cast your vote below! If you have a specific color suggestion that isn't here, or if you prefer a "Dark Mode" vs. "Light Mode" style, let me know in the comments! 👇

20 hours ago | [YT] | 50

MW Electronics Lab

Do you know?
A VU meter converts audio signals into visual light levels using LEDs. When music gets louder, the signal voltage increases and more LEDs turn on step by step. It helps you see the beat, volume peaks and sound intensity in real time.

www.youtube.com/shorts/9nRuiu...

This simple circuit can be connected directly to an amplifier speaker output and works great on 6V to 15V supply. VU meters are used in amplifiers, mixers, car audio systems and DJ setups to monitor audio levels and avoid distortion.

Have you ever built a VU meter or want me to make a pro version with more LEDs and better sensitivity? Tell me in comments.

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5 days ago | [YT] | 84

MW Electronics Lab

Do you know?
PWM stands for Pulse Width Modulation. It controls speed by switching the device ON and OFF very fast instead of reducing voltage. When the ON time is longer, the fan or motor runs faster. When the ON time is shorter, speed becomes slow. This method saves power and produces almost no heat, so it is much better than old resistor or linear control.

PWM is used in many places like DC fan speed control, motor drivers, LED dimmers, solar charge controllers, and battery chargers. Almost every modern electronic device uses PWM for efficient control.

www.youtube.com/shorts/Ws0kiS...

I will make more projects based on PWM like temperature controlled fan, high power motor controller, and digital PWM with display.

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6 days ago | [YT] | 152

MW Electronics Lab

Do you know?
A DC motor converts electrical energy into mechanical rotation. When current flows through the motor’s coil, it creates a magnetic field. This field interacts with the permanent magnets inside the motor, producing a force that makes the shaft rotate.

Why does a DC motor rotate in the opposite direction? 🔄
Because the direction of rotation depends on the direction of current.
When you reverse the supply polarity, the current in the coil reverses. This flips the magnetic force, so the motor starts rotating in the opposite direction. Simple and powerful physics.

This is the same principle used in H-bridge circuits, motor drivers, and robot cars.

👉 Want a simple circuit to control motor direction using switches or transistors? Comment YES.

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1 month ago | [YT] | 344

MW Electronics Lab

🔍 Do you know
A vibration sensor is a device that detects shaking, movement, or sudden vibrations and converts them into an electrical signal. These sensors are commonly used in earthquake alarms, security systems, machines, and safety projects.

Types of vibration sensors:
• Spring or switch-type vibration sensors (simple and low cost)
• Piezoelectric vibration sensors (more sensitive and accurate)
• MEMS vibration sensors (used in smartphones and modern devices)

How it works (basic idea):
When vibration or shock occurs, the internal element of the sensor moves or bends. This movement changes voltage or closes a contact, which triggers a circuit like an alarm or indicator.

Where they are used:
Earthquake alarms, anti-theft systems, machine fault detection, shock alarms, and DIY electronics projects.

Conclusion:
Vibration sensors are simple but powerful components. With a small circuit, they can turn motion into a useful warning signal and help improve safety.

💬 Would you like me to make more projects using vibration sensors?

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1 month ago (edited) | [YT] | 140

MW Electronics Lab

🌞 Do you know?
A solar tracker can increase solar panel efficiency by up to 40–50% compared to a fixed panel.

It works by automatically moving the panel toward sunlight, so it always gets maximum light throughout the day.
That means more power without adding extra panels.

This same concept is used in real solar farms to improve energy output.

💬 Question:
Would you like me to make a simple solar tracker using LDR or a servo-based version next?

👇 Tell me in the comments!

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1 month ago | [YT] | 97

MW Electronics Lab

🤔 Do you know how a coil creates a magnetic field?

When electric current flows through a coil of wire, it creates a magnetic field around it.
This magnetic field is not permanent. It only exists when current flows.

The more turns the coil has, the stronger the magnetic field becomes.
That’s why coils are used in wireless power circuits.

⚡ How it works:
Current → Magnetic field → Energy transfer

When the magnetic field changes, it can send energy to another nearby coil without any wire connection.

🔁 Where coils are used:
✔ Wireless power transfer
✔ Transformers
✔ Motors
✔ Inductors

This is the same principle used in my wireless power video 👇www.youtube.com/shorts/KbEJ59...

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1 month ago (edited) | [YT] | 268

MW Electronics Lab

🔥 What should I focus on more?

1 month ago | [YT] | 41

MW Electronics Lab

🔍 Inside a Capacitor
Ever wondered what’s happening inside a capacitor?
It stores electrical energy and releases it when needed, which is why it’s so good at smoothing power supplies and filtering noise.

Here’s a quick look at how it charges and discharges.

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2 months ago | [YT] | 213

MW Electronics Lab

A relay is an electrically controlled switch. When you send a small voltage to its coil, it creates a magnetic field that pulls an internal contact. That contact connects or disconnects another circuit. This lets you control high-voltage or high-current loads using a low-power signal from Arduino, sensors, or any small circuit.

In the GIF, you’ll usually see:

The coil energizing

The armature moving

The contacts switching (click sound)

A load turning on/off if the relay board has one

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2 months ago | [YT] | 281