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 week 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 week ago (edited) | [YT] | 139

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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2 weeks ago | [YT] | 95

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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2 weeks ago (edited) | [YT] | 268

MW Electronics Lab

🔥 What should I focus on more?

4 weeks 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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1 month 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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1 month ago | [YT] | 282

MW Electronics Lab

How does a servo actually work?
Inside every small RC servo, there’s a tiny DC motor, a set of gears, and a position sensor. The servo compares the incoming pulse (1 to 2 ms) with its internal position and moves the motor until both match. That’s why it always stops exactly at the angle you command. Fast, precise, and perfect for robotics

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1 month ago | [YT] | 251

MW Electronics Lab

Which LED color do you think looks best in electronics projects?

1 month ago | [YT] | 65

MW Electronics Lab

Which pin of the 555 IC is the output pin?

1 month ago | [YT] | 20