1. What is a electrical transformer?

A electrical transformer is an electrical device that controls and adjusts the flow of electricity. It consists of a magnetic core surrounded by two wire coils. When you connect the primary coil to an AC source, you get a changing magnetic field. This, in turn, causes an alternating current in the secondary coil.

2. What does an electronic transformer do?

An electronic transformer helps transfer electrical energy between circuits using electromagnetic induction. It has a magnetic core wrapped with two coils a primary coil connected to an AC source and a secondary coil for a different circuit. When current flows through the primary coil, it creates a changing magnetic field, which in turn induces an alternating current in the secondary coil. The ratio of turns in the coils dictates how the transformer adjusts voltage, either stepping it up or down as needed. Despite the energy transfer, the two coils are always electrically isolated, ensuring safe and efficient operation. Understanding how a transformer works helps you choose the best one for your project.

3. What is the use of an electric transformer?

Electronic transformers are key players in many aspects of our everyday lives, helping deliver electricity safely and efficiently. In power generation, they step up the voltage so electricity can travel long distances from power plants to the grid.For homes and businesses, transformers adjust voltage levels to ensure safe and reliable power. In lighting, they lower the voltage to protect light bulbs and improve their lifespan. In audio systems, transformers fine-tune the voltage for the best sound quality from speakers. And in electronic devices like computers, TVs, and cell phones, they provide the right voltage for smooth operation.

4. Do electric transformers convert AC to DC?

No, electrical transformers don't directly convert AC to DC. Instead, they adjust AC voltage up or down as needed. Transformers work by transferring energy between circuits using magnetic coupling. They either step up the voltage to a higher level or step it down to a lower level, but the current remains AC.While transformers themselves can't change AC to DC, they can be part of a larger setup that does the job. For example, in a power supply system that converts AC to DC, a transformer first adjusts the AC voltage, and then other electronic components like rectifiers handle the conversion to DC.

5. What are the advantages of electrical transformers?

electric Transformers are key in efficient and safe electricity distribution. They adjust voltage levels, allowing efficient long-distance transmission and safe delivery to homes and businesses. By managing voltage, transformers reduce energy loss and minimize electrical hazards. They're versatile, serving in power, audio systems, lighting, and electronic components. Known for durability and reliability, transformers require little maintenance and protect sensitive electronic components by separating primary and secondary circuits. In short, transformers are essential for delivering electricity effectively across various settings.

6. What types of transformers are ideal for DIY electronics?

For most DIY electronics projects, step-down transformers are the perfect choice. They safely reduce your home’s high AC voltage to a lower, more manageable level. Center-tapped transformers are also extremely useful, as they can provide two separate voltage outputs. This feature is great for building custom power supplies that need both positive and negative voltage rails for components like op-amps.

7. How do I select between 12V, 18V, and 24V transformers?

Your selection depends on the final DC voltage your circuit requires after rectification. For a regulated 12V DC output, an 18V transformer is often best as it gives the voltage regulator enough headroom to work effectively. A 12V transformer is suitable for lower voltage DC outputs (like 5V or 9V), while a 24V transformer is better suited for higher-power applications or projects needing a 24V DC supply.

8. Can these transformers handle continuous current flow?

Yes, our transformers are designed for continuous operation as long as you stay within the specified current or VA (Volt-Amps) rating. For reliable performance, always choose a transformer with a current rating slightly higher than your circuit’s maximum expected draw. This prevents the transformer from overheating during prolonged use and ensures a stable power source for your project, protecting both the transformer and your components.

9. Are these suitable for Arduino or robotics projects?

Absolutely! These transformers are ideal for building robust power supplies for Arduino and robotics projects, especially when you need more current than a USB port can provide. You’ll pair the transformer with a bridge rectifier and a voltage regulator (like a 7805 for 5V DC) to create a clean, stable DC power source perfect for running microcontrollers, sensors, and motors reliably.

10. How do I safely wire a transformer in my circuit?

Start by disconnecting the power before wiring. Then identify the primary and secondary terminals using your transformer's datasheet—primary terminals are typically marked H1 and H2, while secondary terminals are marked X1 and X2. Connect the primary wires to your high-voltage AC source and the secondary wires to your load. Ground the transformer properly by attaching the grounding wire to the grounding terminal. Insulate all connections with electrical tape or heat shrink tubing. Finally, verify all connections with a multimeter before powering on.

11. What types of transformers are ideal for DIY electronics?

For most DIY electronics projects, step-down transformers are the perfect choice. They safely reduce your home’s high AC voltage to a lower, more manageable level. Center-tapped transformers are also extremely useful, as they can provide two separate voltage outputs. This feature is great for building custom power supplies that need both positive and negative voltage rails for components like op-amps.

12. How do I select between 12V, 18V, and 24V transformers?

Your selection depends on the final DC voltage your circuit requires after rectification. For a regulated 12V DC output, an 18V transformer is often best as it gives the voltage regulator enough headroom to work effectively. A 12V transformer is suitable for lower voltage DC outputs (like 5V or 9V), while a 24V transformer is better suited for higher-power applications or projects needing a 24V DC supply.

13. Can these transformers handle continuous current flow?

Yes, our transformers are designed for continuous operation as long as you stay within the specified current or VA (Volt-Amps) rating. For reliable performance, always choose a transformer with a current rating slightly higher than your circuit’s maximum expected draw. This prevents the transformer from overheating during prolonged use and ensures a stable power source for your project, protecting both the transformer and your components.

14. Are these suitable for Arduino or robotics projects?

Absolutely! These transformers are ideal for building robust power supplies for Arduino and robotics projects, especially when you need more current than a USB port can provide. You’ll pair the transformer with a bridge rectifier and a voltage regulator (like a 7805 for 5V DC) to create a clean, stable DC power source perfect for running microcontrollers, sensors, and motors reliably.

15. How do I safely wire a transformer in my circuit?

Start by disconnecting the power before wiring. Then identify the primary and secondary terminals using your transformer's datasheet—primary terminals are typically marked H1 and H2, while secondary terminals are marked X1 and X2. Connect the primary wires to your high-voltage AC source and the secondary wires to your load. Ground the transformer properly by attaching the grounding wire to the grounding terminal. Insulate all connections with electrical tape or heat shrink tubing. Finally, verify all connections with a multimeter before powering on.

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Buy Electric Transformers Online

We at Robocraze aim to make sure you have the best electronic components and electrical transformers and supplies for your DIY projects. We provide an excellent selection of electric transformers that are ideal for engineers, students, and beginners alike.

Take a look at our range of electric transformers tailored to your needs. The 12-0-12 Transformer (500mA) is a solid choice for smaller projects, giving you a reliable 12-0-12V output and 500mA current to power low-voltage circuits. If you're looking for a hassle-free way to measure AC current, our Non-Invasive SCT-013 30A AC Sensor Split Core Current Transformer lets you monitor up to 30A without complicated wiring.

If you want different voltage options, the 9-0-9 500mA Transformer is the appropriate choice, which offers a consistent 500mA current and a variable 9-0-9V output. For extra power, use our 12V 1A Transformer (1000mA), which provides a reliable 12V at 1A current for larger applications. The ZMPT101B AC Single Phase Voltage Sensor Transformer Module is the ideal transformer for getting accurate voltage readings.

You can rely on performance and dependability from Robocraze's premium electric transformers to make sure your projects succeed. Now is the time to upgrade your workplace with Robocraze's most prominent electric transformers and electronic components!

Transformer Selection Guide

Choose the right transformer by comparing voltage output, current rating, and total power capacity. Use the table below to identify the best option for your project.

Transformer Type	Output Voltage	Current Rating	Power (VA)	Best Use
Step-Down Transformer	6V, 9V, 12V, 24V	500mA – 5A	5VA – 50VA	Arduino, LED drivers, small circuits
Center-Tap Transformer	12-0-12V / 18-0-18V / 24-0-24V	1A – 5A	12VA – 100VA	Audio amplifiers, power supply rectifiers
High-Power Transformer	12V – 36V	5A – 10A	50VA – 200VA	Motors, tools, high-current circuits

Transformer Type

Output Voltage

Current Rating

Power (VA)

Best Use

Step-Down Transformer

6V, 9V, 12V, 24V

500mA – 5A

5VA – 50VA

Arduino, LED drivers, small circuits

Center-Tap Transformer

12-0-12V / 18-0-18V / 24-0-24V

1A – 5A

12VA – 100VA

Audio amplifiers, power supply rectifiers

High-Power Transformer

12V – 36V

5A – 10A

50VA – 200VA

Motors, tools, high-current circuits

Use Cases

Arduino & Microcontrollers – Step-down transformers (6–12V) for regulated 5V power supplies.

DIY Power Supply Projects – Center-tap transformers for rectifier + filter + regulator circuits.

Audio Amplifiers – 12-0-12V or 18-0-18V transformers used in TDA2030, TDA7294, LM3886 amps.

LED Drivers – Isolated AC to low-voltage DC conversion.

Robotics – Transformers feeding high-current motor drivers (with proper rectification).

Basic Wiring Diagram

AC Mains (230V) | | [Primary Coil] | | ---------------- || <- Magnetic Coupling ---------------- | | [Secondary Coil] → AC Output (6V / 9V / 12V / CT) | | After the transformer: Secondary AC → Bridge Rectifier → Smoothing Capacitor → Voltage Regulator → DC Output

Safety Note

Never touch the primary (230V AC) terminals while powered.

Use proper insulation, heatshrink, and fuse protection.

Mount the transformer securely to avoid vibration damage.

Use a multimeter to verify output before connecting to circuits.

Ensure adequate ventilation for high-wattage transformers.

Video Tutorial: How to Test a Transformer

Here’s a simple step-by-step video guide outline you can use to create or upload as a tutorial:

Introduction – Types of transformers (step-down, CT, audio).

Tools required – Multimeter, insulated wires, lamp tester (optional).

Testing the primary coil – Check continuity using a multimeter.

Testing the secondary coil – Measure resistance of each output winding.

Live testing – Carefully measure AC output voltage on secondary (with isolation & safety).

Testing center-tap outputs – Measure between CT and each terminal.

Common faults – Overheating, burnt windings, open coils.

You can convert this into a short educational video for YouTube or embed it on your product page.

Item Name	Price
12-0-12 Transformer-500mA	Rs. 99
Non-Invasive SCT-013 30A AC Sensor Split Core Current Transformer	Rs. 359
9-0-9 500mA Transformer	Rs. 84
12V 1A Transformer - 1000mA	Rs. 162
ZMPT101B AC Single Phase Voltage Sensor Transformer Module	Rs. 122

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All About Transformers for Electronics and Power Supply

Buy Electric Transformers Online

Transformer Selection Guide

Use Cases

Basic Wiring Diagram

Safety Note

Video Tutorial: How to Test a Transformer

Related Blog

Electric Transformers Price

Frequently Asked Questions

1. What is a electrical transformer?

2. What does an electronic transformer do?

3. What is the use of an electric transformer?

4. Do electric transformers convert AC to DC?

5. What are the advantages of electrical transformers?

6. What types of transformers are ideal for DIY electronics?

7. How do I select between 12V, 18V, and 24V transformers?

8. Can these transformers handle continuous current flow?

9. Are these suitable for Arduino or robotics projects?

10. How do I safely wire a transformer in my circuit?

11. What types of transformers are ideal for DIY electronics?

12. How do I select between 12V, 18V, and 24V transformers?

13. Can these transformers handle continuous current flow?

14. Are these suitable for Arduino or robotics projects?

15. How do I safely wire a transformer in my circuit?

Let customers speak for us

All Categories

Transformers for Electronics and Power Supply

High-Efficiency Transformers for DIY Power Projects

Categories

Refined By Clear all

Availability

Price

Featured Products

Sort by:

Recently Viewed Products

All About Transformers for Electronics and Power Supply

Buy Electric Transformers Online

Transformer Selection Guide

Use Cases

Basic Wiring Diagram

Safety Note

Video Tutorial: How to Test a Transformer

Related Blog

Electric Transformers Price

Frequently Asked Questions

1. What is a electrical transformer?

2. What does an electronic transformer do?

3. What is the use of an electric transformer?

4. Do electric transformers convert AC to DC?

5. What are the advantages of electrical transformers?

6. What types of transformers are ideal for DIY electronics?

7. How do I select between 12V, 18V, and 24V transformers?

8. Can these transformers handle continuous current flow?

9. Are these suitable for Arduino or robotics projects?

10. How do I safely wire a transformer in my circuit?

11. What types of transformers are ideal for DIY electronics?

12. How do I select between 12V, 18V, and 24V transformers?

13. Can these transformers handle continuous current flow?

14. Are these suitable for Arduino or robotics projects?

15. How do I safely wire a transformer in my circuit?

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