Simple Mini Inverter using IC 4047

A mini inverter is a useful electronic circuit that converts DC (Direct Current) into AC (Alternating Current), making it ideal for small-scale power backup applications. The IC 4047 is a versatile monostable/astable multivibrator IC, commonly used in inverter circuits due to its ability to generate stable square wave pulses. This project focuses on building a simple mini inverter using the IC 4047, a few transistors, and a transformer to power small AC appliances.

Components Required:

1. IC 4047 – Used to generate square wave pulses.
2. Transistors (TIP122, TIP127, or MOSFETs) – For switching the transformer.
3. 12V Battery – Power source for the inverter.
4. Step-up Transformer (12V-230V, 1A-5A) – Converts low-voltage DC into high-voltage AC.
5. Resistors and Capacitors – For circuit stability.
6. Diodes and LED – For indication and protection.

Working Principle:

• IC 4047 operates in astable mode, generating a stable 50Hz (or 60Hz) square wave output.
• The output from the IC drives power transistors or MOSFETs, which act as switches to alternate the DC supply through the transformer.
• The transformer steps up the 12V DC signal into 230V AC, which can be used to run small AC appliances like LED bulbs, chargers, or small fans.

Applications:

• Emergency power backup for small devices.
• Low-power household applications.
• Educational projects for learning about inverters.

Advantages:

• Simple and cost-effective circuit.
• Low power consumption.
• Easy to assemble and modify for higher wattage.