This weekend I cracked into developing a commercial product, which I have nick-named Sparrow. I have have spent some time documenting what I was going to do, which helped over the months, at least it helps you focus attention in the right area. But also helps you refine what is going to be implemented. The project is based on a micro controller (a small computer). Its like a one chip computer, but the programming is low level. The win this weekend was writing and reading data to the internal EEPROM, programming and reading the time from another chip using I2C and creating an algorithm to calculating seconds to epoch. Much of the internal code was also completed today to handle events The remaining code chunks to go include the 1-wire interface, serial board interfacing and finally hardware refinement.