Simple DIY inverter project with CD4049 IC

Making a simple DIY 1000-watt inverter using CD4049 IC is a simple project to convert DC (Direct Current) voltage from a battery or other DC source into an AC (Alternating Current) voltage suitable for powering various high-power appliances or industrial devices. The CD4049 IC, also called a hex inverting buffer, is a versatile component that can be used in various electronic circuits, including the inverter circuit. Here are the steps involved in building a CD4049 inverter circuit rated at 1000 watts.

cd4049 Pinout


Cd4049 Pinout

Materials Required:
– CD4049 Hex Inverting Buffer IC
– High power MOSFETs (IRF3205, IRF540 or MOSFET with suitable rating)
– High ampere-rated diodes (such as 1N5408 diodes or similar)
– High voltage-rated capacitors and resistors
– Transformer (Suitable for 12 V DC to 220 V AC conversion, rated 1000 to 1500 watts)
– Printed Circuit Board (PCB)
– Large Heat Sink
– Soldering Iron and Solder
– Multimeter



1. Begin by assembling the required components for the circuit.

2. Create a circuit diagram for the CD4049 inverter using any circuit drawing software or by hand.

3. Solder the CD4049 IC on the PCB, ensuring that it is placed correctly and in the correct orientation.


4. Connect the power supply to the PCB, connecting 12V DC to the board and grounding the negative.

5. Connect the MOSFETs’ gate pins to the CD4049 IC outputs on the PCB.

6. Connect the sources of the MOSFETs directly to the output pins of the transformer.

7. Add high ampere diodes (1N5408) across the MOSFETs sources and drain to prevent back EMF (Electromotive Force) from the transformer.

8. Add a suitable value capacitor between the input of the CD4049 IC and the ground to filter out any noise.

9. Add a suitable value resistor (10kΩ) in series with the capacitor to protect the IC’s input.

10. Add a suitable value capacitor (0.1μF to 1μF) across the resistor to stabilize the circuit further.

11. Connect the primary side of the transformer to the MOSFET’s sources, and the secondary to the appliance to be powered.

12. Mount a large heat sink on top of the MOSFETs.

circuit diagram here

13. Lastly, test the inverter by putting a load of up to 1000 watts.


In conclusion, building a CD4049 inverter rated at 1000 watts is an easy way to convert DC voltage to AC voltage. Utilizing a CD4049 hex inverting buffer, high-voltage MOSFETs, and high ampere diodes are essential in this inverter’s design. Careful observation of resistor and capacitor values along with the transformer’s appropriate rating and connection will ensure stable and efficient operation. Additionally, proper use of a heat sink and adequate ventilation will prevent thermal runaway and prolong the lifespan of the device. Remember to assemble the components in the correct polarity, secure the connections adequately, and handle them carefully to prevent damage. Follow the steps outlined above to build a robust and efficient CD4049 inverter rated at 1000 watts.


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