This 12V Mini Inverter Circuit using Transistor TIP41 is a simple micro inverter.
It converts 12V DC battery power into AC power where the AC output is with low power.
It is useful for learning and for small experiments and it can light small AC load like night bulb.
This circuit uses two TIP41 transistors and it uses a center tap transformer.
Circuit Working:
Parts List:
| Components Name | Specification | Quantity |
|---|---|---|
| Resistors | 1k 1/4 watt | 2 |
| 4.7k 1/4 watt | 1 | |
| Capacitor | Ceramic 0.01uF | 1 |
| Semiconductors | Transistor TIP41 | 2 |
| Battery 12V DC | 1 | |
| Transformer 12V-0V-12V Primary, 120V to 220V Secondary | 1 | |
| ON OFF Toggle Switch | 1 | |
| Fuse 0.5A to 1A | 1 | |
| Indicator LED any 5mm | 1 |
In this circuit the battery gives 12V DC supply.
Switch S1 is used to turn ON the circuit.
Resistor R3 limits current to LED and this LED shows power ON indication.
The center tap of transformer is connected to 12V supply.
Both TIP41 transistors work as switches.
R1 and R2 control base current of transistors.
When transistor Q1 turns ON then current flows in one half of transformer.
Then Q1 turns OFF and Q2 turns ON.
Now current flows in other half of transformer.
This ON and OFF action repeats fast.
Transformer converts low voltage to high voltage.
AC voltage appears at transformer secondary and this AC output is taken from AC socket.
How to Build:
To build a 12V Mini Inverter Circuit using Transistor TIP41 follow the below connection steps:
- Gather all the parts as shown in circuit diagram.
- Q1 and Q2 transistors emitter pins connected to ground.
- Collectors connected to transformer primary ends.
- Base pins connected to R1 and R2 resistors.
- Transformer center tap connected to 12V battery positive.
- Transformer secondary connected to AC output socket.
- LED anode connected to resistor R3.
- LED cathode connected to ground.
- Battery negative connected to common ground.
- Switch connected in series with battery positive.
Conclusion:
This 12V Mini Inverter Circuit using Transistor TIP41 is very simple and easy to make.
It is good for beginners and students.
Output power is low and its efficiency is also low as it is not suitable for heavy loads.
Use heat sink on TIP41 transistors and always be careful with AC output voltage.
References:
How to build a simple 12VDC-12VAC transformerless inverter using transistor