The ratio of the resistors R3/R5 in the circuit has been precisely adjusted for obtaining the required 110V at the output terminals across the load L1.Ī 100uF / 400V capacitor can be seen introduced in series with the load for extra safety. Thus the circuit can be used for setting the input voltage at the required 100 V level. The circuit is based on the regular light dimmer switch circuit principle, where the input phase is chopped at the particular voltage marks of the rising AC sine wave. The actual author of this circuit says that he designed the following converter circuit only after doing a thorough research regarding the involved issues and have confirmed it to be safe. This light dimmer option presented here has not been tested by me, but looks good to me, however many will find the concept dangerous and very undesirable. The maximum current that can be drawn from this converter is not more than 300 mA, or around 30 watts.Īlternatively a simpler version of the circuit can be made, where the main high triac is operated via a cheap light dimmer switch for the intended results. However since these diodes require an input DC, four more diodes are wired up as a bridge network for the initially required 220V DC to the circuit. If we multiply 190 by 0.6, it gives around 114, so that's pretty close to the required mark of 110V. The converter will not work with equipment incorporating a transformer at its input. The first circuit will convert a 220V AC input to any desired output level from 100V to 220V, however the output will be a DC, so this circuit may be used for operating a foreign equipment which might be employing an AC/DC SMPS input power supply stage. This feature helps to get rid of the big and bulky converters and helps to keep away from the unnecessary mess.ĬAUTION: ALL THE CIRCUITS DISCUSSED HERE HAVE POTENTIALS OF CAUSING SEVERE LIFE AND FIRE HAZARDS, EXTREME CAUTION IS ADVISED WHILE GETTING INVOLVED WITH THESE CIRCUITS.Īll these circuit diagram have been developed by me, let's learn how they can be constructed at home and how the circuit functions: Using Only Series Diodes The proposed homemade converters can be customized and dimensioned as per the gadget size so that these may be inserted and accommodated right inside the particular gadget. The present article explains s few interesting concepts which can be possibly implemented for making compact, transformerless 220V to 110V converter circuits. Though there are 220V to 110V converters available for solving the above issue, these are big, cumbersome and immensely costly. ![]() Folks procuring imported gadgets from a foreign region having a different mains voltage specs find it difficult to operate the equipment with their AC outlets because of the huge difference in the required input levels. The USA works with a 110V AC mains domestic line while European countries and many Asian countries supply a 220V AC to their cities. Primarily there are two AC mains voltage levels that are specified by countries across the globe. However if you are interested in easier albeit crude 110V converter versions, you may definitely take a tour across the various designs explained below: Why we Need 220V to 110V Converter An SMPS circuit is the recommended option for building this converter, so for an SMPS 220V to 110V converter design you can study this concept.
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