Sorting counters have many uses: keeping score, counting parts, counting people. It can be a handy gadget to have on-hand. Hand tally counters are often use for counting people at events or even cars on the road. Instead of using a sheet of paper and marking four lines and a slash showing a count of five, you just push the button(s). This sorting counter allows you to keep a total, plus keep track of specifics.
This is a very simple project for those who want to learn to solder or are interested in using microprocessors and how they function. No special tools are needed beside a small tip soldering iron. It has no box as it stands alone, therefore there's no drilling.
The MCU PIC16F726 is pre-programmed.