GM320 – Non Contact thermometer, just $11.88 US on Banggood:
Also, just $10.99 US: Anemometer – the cheapest in the world:
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The Cheapest WS2812/WS2812B programmable LED and LED strips on planet EARTH (Make your DRONE really visible) :
And other good and cheap products I found on the market:
First Arduino project, you can find here.
More Arduino sketches soon…