On 15.01.14 15:08, Toby Corkindale wrote:
The Beaglebones have had good manufacturer support for Linux, and stable distributions. (Which is something the cheaper Chinese boards tend to be lacking in)
Looks like the rated temperature for the board is only up to 50°C, but someone has reported having it work fine at 70.. https://groups.google.com/forum/#!topic/beagleboard/p_DK-HE1Ds4
Yup, but the Arrhenius equation reminds us that every 10°C rise in temperature halves the lifetime of the board's components. (I.e. Add 40°C => 1/16 lifetime) So I'd still add a Peltier-effect cooler to drop 25°C when things warm up. It runs off 12v dc, around 4A (or was it 6A tops for the bigger one?) (Cascading 3 on top of the first could take off something less than 50°C, with a good sized heatsink on top, but now we're up around 200W for cooling, IIRC.) If the beagleboard drives the cooler through a power FET, PWM could provide proportional control. (The A/D converter is a little bit noisy, I've read, but much more than good enough for a thermostat.) Erik -- The future is a race between education and catastrophe. - H. G. Wells