Connection with arduino UNO and DC programmable power supply


I am using Arduino UNO ATmega328 microcontroller and I am generating a sinusoidal voltage with in the code itself. The amplitude of the sinusoidal voltage is varying from 0-6.4 v. As i want to get this voltage amplify, so i want to connect this voltage which is coming from the analog ouput pin of the UNO to the programmable power amplifer, so that i can the amplify voltage and current. So any one can help me regarding this.

Thanks in advance

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