SD/CF cards freeze in cold weather :( On May 18, 2015 6:09:07 PM AKDT, "Forrest Christian (List Account)" <[email protected]> wrote: >What is the lowest temperature that each of you would normally expect >to >see in your enclosures? > >The reason I'm asking is that I'm in the process of developing up a few >new >products. > >To date, all of the packetflux products are designed with components >rated >-40 to +85C (I.E way cold to way hot). I'd like to retain this >rating, >but I'm running into a minor snag: > >For storage, I'm planning on integrating a SD card (probably microSD) >in a >socket. I only need a GB or so, and SD card memory is inexpensive at >that >range. > >Unfortunately, all the reasonably priced SD cards are only rated down >to >about -25C or -13F. which are about ~$3 in qty. "Industrial >temperature >range" ones which are good down to -40C/F are available but they add at >least $30 to the cost for non-name brand, and even more for known >brands. >When you're talking about a $100 end-user price, a $30 1GB SD card >seems >excessive - and probably isn't even possible if I want to meet the $100 >price with some margin. > >So, I'm currently playing the 'what options do I have' game. I hate >to >ship a product only rated down to -25C/-13F, but I know for at least a >large chunk of my customer base they never see below this temperature, >especially when you add a watt of power dissipation in the case with >the >device. Which leads me back to my original question: What's the >lowest >temperature most people would expect to see inside their enclosures. > >-- >*Forrest Christian* *CEO**, PacketFlux Technologies, Inc.* >Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602 >[email protected] | http://www.packetflux.com ><http://www.linkedin.com/in/fwchristian> ><http://facebook.com/packetflux> ><http://twitter.com/@packetflux>
-- Sent from my Android device with K-9 Mail. Please excuse my brevity.
