Writing a microcontroller program and implementing it in real hardware simply requires a development system. The Elektor Electronics 89S8252 Flash board is just the ticket, even if you intend to write code for a target system based on a ‘lesser’ controller like the AT89C2051.In this article, our assignment will be to design electronic dice based on a microcontroller type AT89C2051. Admittedly, not a particularly exciting end product, but the assignment is not too complex and so forms a useful example for those that need to get to develop programming skills. Once the basics are mastered, the steps involved in writing code are easily applied to more serious applications.