Step 5: Add a capacitor to stabilise the power supply
Connect the 220 uF capacitor between the red 3V rail and the blue 0V rail on the left side of the breadboard. The capacitor is polarised, so it must be inserted the right way around. The minus leg is indicated by a black stripe down the side of the cylindrical body of the capacitor. The minus leg should be inserted into the blue 0V rail.