Development of a Microcontroller-Based 6/12/18/24V Power Inverter Circuit

Abiodun Ogunseye, Daniel Ogheneovo Johnson


A power inverter circuits is normally designed to meet its design specifications when the applied input DC voltage is within specified tolerance limits. Thus, single input inverters are usually specified to work from a DC source having a fixed nominal voltage. This limits the usefulness of the inverter circuit when a DC source having the specified nominal voltage is not available. In this work, a modified square wave inverter system that is specified to work properly from batteries with nominal voltages of 6, 12, 18 and 24 V was designed.  A model of the microcontroller-based circuit was developed with Proteus® software and its firmware was written in C language using the MicroC® development tool. A prototype of the circuit was constructed and then tested.  The constructed circuit was found to work properly by producing a 50 Hz modified square waveform when it was powered from batteries having nominal voltages of 6 V, 12 V, 18 V and 24 V.


Microcontroller, Inverter, modified square wave, multi-tap transformer, push-pull

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Gommeringer, M., Kammerer, F., Schmitt, A., & Braun, M. (2014). A Transformerless Single-Phase PV Inverter Circuit for Thin-Film or Back-Side Contacted Solar Modules. Industrial Electronics Society (pp. 1148-1153). Dallas, Tx.: 40th Annual Conference of the IEEE.

Power Inverters 12V to 230V. (1999, Nov. 8). Retrieved Nov 30, 2016, from Qsl.Net:

Yahaya, N. Z., Baharudin, Z., & Rosli, M. A. (2016). Multi‐input DC‐AC inverter for low voltage hybrid PV/wind/hydrogen fuel cell power system. Journal of Scientific Research and Development , 3 (5), 12-17.

Yalamanchili, K. P., and Ferdowsi, M. (2005). Review of multiple input DC-DC converters for electric and hybrid vehicles. IEEE Vehicle Power and Propulsion Conference (pp. 160-163). IEEE.

Sivakumar,N. and Sumathi, A. (2013). Control of Hybrid System Using Multi-Input Inverter and Maximum Power Point Tracking. International Journal of Engineering Research and Applications , 3 (4), 77-81.

Yuvaraj, V., Rozario, R., and Deepa, S. N. (2011). Implementation and Control of Multi-input Power Converter for Grid Connected Hybrid Renewable Energy Generation System. Student Pulse Academic Journal , 3 (6).

Menon, A. and Madhumitha, R. (2014). Design and Simulation of Solar –Micro Inverter with Multiple Loads. International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering , 3 (5), 9612-9620.

Dandin, S and Khumari, A. (2014). Highly Efficient Pure Sine-Wave Inverter for Photovoltaic Applications with MPPT Technique. International Journal of Engineering Research and Technology , 3 (5), 1837-1842.

Kayabasi, A. and Akkaya, R. (2009). The Design and Implementation of a Microcontroller-Based Single Phase On-Line Uninterrupted Power Supply With Power Factor Correction. International Conference on Electrical and Electronics Engineering (ELECO 2009.), (pp. 442-446).

Ogunseye, A. A and Ogunseye, T. T. (2015). Development of a Microcontroller Based 12/24 Volts Push Pull Inverter System. IOSR Journal of Electrical and Electronics Engineering , Vol.10, Issue 6. pp. 16-21.