Kiln controller? Anyway you would be hard pushed to find ANYTHING electronic that can withstand that sort of temp without some sort of cooling system.W. H. Heydt wrote:I was looking up various sties to check availability of CM3/CM3L boards. One site had the spec that the design temperature range is -25C to +80C. A Pi3B certainly wouldn't have a wider specified range. Of course, we all know that a Pi will operate at temps below -25C, but I wouldn't want to bet on anything much over the +80C on the high end and *certainly* not +185C.
My usual rule of thumb is that the Pi is fine in any temperature in which it's owner can "operate". I will admit to curiosity about where the OP wants to use a Pi that gets to 185C (I can think of such places, I'm just wondering about this specific use).
With the exception of a Parallax Propeller (P8X32A), which has been tested to be reliable to even higher temperatures. Wish I still had the link to the thread in the Parallax forum where Parallax tested the Propeller to extreme temperatures. Turned out that the Propeller MCU could handle temperatures higher than the crystal could remain stable.jamesh wrote:
Kiln controller? Anyway you would be hard pushed to find ANYTHING electronic that can withstand that sort of temp without some sort of cooling system.
Most chips are good for 150degC (they are tested in ovens!), it's the rest of the stuff around them that would fail. Although high temps will dramatically reduce chip lifetime.DavidS wrote:With the exception of a Parallax Propeller (P8X32A), which has been tested to be reliable to even higher temperatures. Wish I still had the link to the thread in the Parallax forum where Parallax tested the Propeller to extreme temperatures. Turned out that the Propeller MCU could handle temperatures higher than the crystal could remain stable.jamesh wrote:
Kiln controller? Anyway you would be hard pushed to find ANYTHING electronic that can withstand that sort of temp without some sort of cooling system.
source: https://technick.net/guides/electronics ... _to_solderThe melting point of most solder is in the region of 188°C (370°F) and the iron tip temperature is typically 330°C to 350°C (626°F to 662°F).
So, it has to be under 110'C,i think.Beyond that cooling system is mandatory.I will ask my client to give compliance for coolingjamesh wrote:Most chips are good for 150degC (they are tested in ovens!), it's the rest of the stuff around them that would fail. Although high temps will dramatically reduce chip lifetime.DavidS wrote:With the exception of a Parallax Propeller (P8X32A), which has been tested to be reliable to even higher temperatures. Wish I still had the link to the thread in the Parallax forum where Parallax tested the Propeller to extreme temperatures. Turned out that the Propeller MCU could handle temperatures higher than the crystal could remain stable.jamesh wrote:
Kiln controller? Anyway you would be hard pushed to find ANYTHING electronic that can withstand that sort of temp without some sort of cooling system.
While the cooling system of the human body would indeed keep it in operating temperature so long as in direct contact with the surface of a living human body, the human body may be the weak link in the equation, as I do not know how long the human body can stay functional at those temperatures. In other words while the stated suggestion is workable, you would be replacing the living human body component often do to frequent complete system damage on that component, that is catastrophic and permanent.CarlRJ wrote:The Pi will operate properly in any temperature environment for an extended period of time so long as you are standing there holding the board in your bare hands. It'll probably also work a bit above and below that temperature range, thus comfortably exceeding the needs of its intended use cases.