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Transformers are basic design of electrical device which provide power transmission by transforming induced current from one circuit to another. The induced current can be converted step up or step down of current or voltage. The monitoring and control of the transformer is done by using ARM7 processor, RF transmission for wireless communication and sensors which check the level of gas, aging of oil, overload and maintain temperature by regular observation. There are various transformer maintenance techniques but this paper gives a real time monitoring and controlling of transformers by using ARM7 processor which replace the bulky computers making it as embedded system. The design is to sense the features of transformer and send the information regularly to the processor, the processor in turn will make the transmission through RF to the client. So, this design makes it possible to attain real time control …