Mr. Joel Lookadoo, Arkansas's 2020 Teacher of the Year, is doubling as a repairman today. The clock in the schoolhouse is broken, and it's up to him to fix it. Being able to tell time is so important!

You can use a microcontroller to build a clock. After all, a clock is just something that counts the passage of time. The only problem is that microcontrollers can’t track time very accurately. They ...

You have to be pretty ambitious to modify a clock to run for 50 years on a single battery. You also should probably be pretty young if you think you’re going to verify your power estimates, at least ...