TM1638 + arduino nano race display case
thingiverse
A case for tm1638 (https://s.click.aliexpress.com/e/_Bf9tWP0Y) display and arduino nano to make racedisplay. Use "simhub" software to make firmware for arduino and flash it (arduino -> my hardware -> single arduino). I'm using 4 3mm round magnets to snap in to monitor. Also used 4 12*3 tapping screws to attach lid to the body. You also need soldering iron for wiring and removing standart pins on TM1638
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