DC/AC inverter


Posted on Feb 6, 2014

It is using the IC-type multi-vibrator for the oscillator of the alternating current. The frequency is about 60 Hz. I used 7400 as the IC for the oscillator but 7404 is OK. The signal of the oscillator has the switching operation with TR1-TR4. TR2 and TR4 are the transistor for the main switching. Because these transistors are difficult to drive directly from the IC, they make amplify in the electric current using TR1 and TR3.


DC/AC inverter
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Because the comparatively big electric current (about 3 A) flows through the part of the line that the circuit diagram is bold, the thick wiring materials are used. I was asked about 220V output from some readers. The output voltage of the inverter is decided only in the transformer. You can use the transformer with 220V as for primary(input) and 12V as for secondary(output). At my circuit, primary and secondary should be used oppositely. Then, you will be able to get AC220V from DC12V.




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