Versatile LED display

Microprocessors are regular devils for work. In many cases, this involves gathering data, performing calculations and finally making the results visible. For this last, often very important task, a display is necessary. The circuit presented here shows that only a few components are needed to make an inexpensive display that has high contrast and is thus easy to read.Most microprocessor systems are difficult to use without a good display. Microprocessors are after all black boxes that can quickly perform a whole lot of computations, totally hidden from the outside world. Since computation is not an end in itself, and the user wants to see clear conclusions, many projects need displays. Liquid crystal (LC) displays are used more and more often for this purpose, for evident reasons: ...