资 源 简 介
Summary:
When I was younger I had a calculator that did not have a LCD display but instead had two LED lights, one green and one red. You would enter a math problem with what you thought the correct answer was (for example, 12 + 12 = 24, and then press the "?" key). If your answer was right the green LED would light up, if your answer was wrong, the red LED would light up.
This is my salute to that toy from my childhood, as well as a great way for me to engineer and program a neat little project that my preschool son can actually use to check his simple math.
This first part will document the prototype that I have built. My first objective was to create a calculator capable of just adding and subtracting using off the shelf items. I plan on starting with an Arduino Pro Mini for the developmental and prototype stage and once I can get most of the major bugs worked out I will then move on to a final version that has a lower cost and device count (ATmega32
