There were a number of hardware issues with Arduino at cryogenic temperatures: capacitors loose most of their capacitance, brown-out detection was tripping, 3.3V linear regulator for LCD backlight supply was failing.
Arduino overclocking with Liquid Nitrogen cooling 65.3Mhz@-196°C
![](https://tgdaily.com/wp-content/uploads/2019/05/maxresdefault-267x150.webp)