Through Hole Capacitor

This is a 0.1uF – (104) Ceramic Capacitor  Use this capacitor for power decoupling, having a smooth power in your circuit, timing circuits, etc. It is always a good idea to put one of these next to the power pins of a microcontroller.

An aluminum electrolytic capacitor, often only called an electrolytic capacitor, uses aluminum metal as one electrode, is covered with a very thin layer of aluminum oxide as dielectric, and has an electrolyte as its second electrode. Aluminum electrolytic capacitors are typically used in power supplies and DC-DC converters for smoothing and buffering rectified DC voltages in many electronic devices.