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Here is a 30 Watt inverter circuit using minimum number of components. Here use a CD 4047 IC from Texas Instruments for generating the 100 Hz pulses and two 2N3055 transistors for driving the load. The IC1 Cd4047 wired as an astable multivibrator produces two 180 degree out of phase 100 Hz pulse trains. These pulse trains are preamplified by the two TIP122 transistors.The out puts of the TIP 122 transistors are amplified by four 2N3055 transistors to drive the inverter transformer.The 20V AC will be available at the secondary of the transformer. Nothing complex just the elementary inverter principle and the circuit works great for small loads like a lap top.
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Posted:May 26, 2011
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