
[Nathan]'s son really loves numbers and counting, and one of his favorite things to do is add 1 to a calculator over and over again. Being the awesome dad that he is, [Nathan] built his son a counting box that has a 10-digit rotary switch and two arcade buttons to add and subtract. One goal of the project was to have the counting box retain memory of the display while being powered off. The … [Read more...]





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