In this project, let’s learn how to make an Inverter – a Simple 40 watts inverter circuit using minimal components. An inverter circuit is often used in DC to AC applications and is necessary for many electronics applications. The heart of this circuit is a digital IC CD4047 – which is a very popular component.
Let’s Build our Simple 40 Watt Inverter
This is the schematic of a simple 40W, 12 volts to 220 Volts inverter. You don’t believe, this is simple and cheap and working for me for the last 4 years. The heart of the circuit is a CD 4047 IC which is wired as an astable multivibrator here. Resistance and Capacitance at pin 1&2 determine the output frequency. Here it is set to 60Hz. Due to this, a two 180 degree out of phase,120 Hz, 50% duty cycle waveforms will appear at pin 10 & 11. These waves are amplified by the complementary symmetry amplifier made of transistors BC 337 & TIP 3055 to drive the output transformer. Don’t get feared of the technical terms, just wire it on an all-purpose PCB. It is simple and will work. Don’t worry about the transformer windings, buy a 220-110-0 primary,12-0-12 secondary, <50W transformer. You can select the output voltage of 110V or 220V by a two-way switch using such a transformer. Don’t worry if you don’t have such a transformer, a simple 220 to 12-0-12 will also do the trick sacrificing the 110V option or vice versa. The best way to get a transformer is to break all useless electronic devices in your trash. Most probably you will find the transformer or more components needed here!
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If you are interested in building other inverter circuits, you may try your hand in our simple 100 watts inverter circuit. You can also try our 60 watts inverter using transistors and also our 100 watts inverter circuit using 2N3055. The circuit diagram for the inverter circuit explained in this article is given below.
Simple Inverter Circuit Diagram:
First wire to oscillator part only. Then check out put Pin 10 &11 of CD4047 to obtain the required waveforms ( two 120Hz,180 degrees out of phase,50% duty cycle waves.
Then connect transistors, transformer and load (25 W bulb for test). See it working!.
Building an inverter circuit is a dream for every electronics hobbyist and engineering student. After building this circuit successfully, try our other inverter circuit models listed above.