Connect the Arduino to the computer via USB and connect your analog signal input to the A0 pin of the Arduino. The ground should also be connected to the pin GND of the Arduino.

Arduino UNO The Uno is a microcontroller board based on the ATmega328P. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB ...