The Yocto-SPI documentation contains an example to interface the AlphaSense OPC-N2 particle counter. Since then, Alphasense has released a new model, the OPC-N3, and the commands to query it are slightly different. This week, by popular request, we explain how to make the OPC-N3 work with a Yocto-SPI and we take this opportunity to introduce a small innovation.
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There are probably not many measuring devices based on a physical phenomenon as unstable as barometric altimeters. And yet, they are still widely used, for want of anything better. Technological progress even makes it possible to go even further in the accuracy of this technique, which seems to defy common sense. Welcome to the Yocto-Altimeter-V2!
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This week, we are going to do a small and amusing DIY: we will build a speedometer for a hamster wheel.
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It seems that when it comes to installing accessories such as electrically powered roller shutters or lights built into a house, the tendency is to avoid pulling cables but to stick on the walls switches which are actually battery-powered radio controls. We are not very convinced of the ecological balance sheet of such a shortcut, but it opens up interesting prospects in terms of DIY.
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To open the door to new applications, we extend our range of analog voltage measuring tools. The newcomer, the Yocto-MaxiMicroVolt-Rx, is the most accurate of all, and it can measure minute voltages, in the order of the micro-volt. Let's see what this means...
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