Add a watch crystal to a Boarduino

If you want to make a clock with an Arduino/Boarduino/AVR, there is a way to hook up a precision 32khz watch crystal

mtbf0 shows you how!
pictured above is his LCD clockduino!

Trialex followed up with a really-big-7-segment clock (in the same thread)

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  1. Here’s mine, though it is possibly cheatier by using an RTC:


    (It really was 4:16 when I took the photo, even though my camera disagrees.)

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