Welcome to the channel! In this video, I’ll show you how to make a simple square wave inverter using basic electronic components like BC547 transistors, IRFZ44N MOSFETs, and a 12-0-12 transformer.👉 This inverter is powered by a 14.8V battery pack (4×18650 Li-ion cells in series) and can light up a 10W AC bulb easily. It's a great DIY project for electronics hobbyists or students learning about transistor-based oscillators and inverter design.
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🛠️ Key Components:
2 × BC547 transistors
2 × IRFZ44N MOSFETs
2 × 10kΩ resistors
2 × 470Ω resistors
2 × 1µF capacitors
2 × LEDs (for indicator)
2 × 100Ω (1W) gate resistors
12-0-12V transformer (1.5A)
4 × 18650 Li-ion batteries
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⚙️ Working Principle:
A transistor-based astable multivibrator generates a square wave signal.
This signal drives the IRFZ44N MOSFETs, which switch the 12-0-12 transformer.
The transformer steps up the DC voltage to 220V AC (square wave) output.
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💡 Test Result:
10W bulb = ✅ Full glow
100W bulb = ⚠️ Dim (due to low power limit)
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📌 Note: This inverter is basic and outputs square wave AC, not pure sine wave. It’s ideal for small loads like LED bulbs or small chargers.
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📥 Circuit Diagram & Explanation: WhatsApp channel
📃 #DIYInverter #SquareWaveGenerator #ElectronicsProject #BC547 #IRFZ44N #HomemadeInverter
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