Picosatellite is the name given to the category of satellites that ranges from 0.1 to 1 kg mass. A popular standardized format is the CubeSat which is a cubed shaped satellite measuring 10 cm on its sides. The objective of this thesis is to analyze the requirements for a wheel based ADCS (Attitude Determination and Control System) for a picosatellite using as much as possible COTS (commercial off the shelf) components and suggest a design to be used in the near future by the University's own CubeSat program. Results are obtained by testing and simulations.