I’m going to be flying one of my transmitters soon on a weather balloon, so I wanted to make sure it would work properly at the cold temperatures normally experienced there. So I went over to the local Fred Meyer and grabbed a block of dry ice. I stuck the block and my transmitter in a cooler overnight, and watched the data roll in.
Looks like the onboard temperature sensor got down to about -50C and the board ran quite happily. Looks like I’ll be good to go for the flight.
Here’s a photo of it covered in a bit of frost right after I took it out of the cooler.
