This week, we show you how to build a bar lamp based on RGB LEDs. It's easy and you will end up with something almost as pretty as those you may find in your favorite appliance store. Moreover, each LEDs can be controlled individually, which is not a common feature among design lamps.
Irrigation controllers are very convenient to avoid the garden watering chore, but they sometimes create disasters. As times goes by, and with changes in temperature, pipes tend to unbend and sometimes to separate at the joints, creating local inundations which can be devastating the vegetable patch, for example. Let's see how to detect leaks as quickly as possible...
A few weeks ago, we explained how to use our modules with PHP. At the time, we explained how to use PHP in direct mode, but there is another way: the HTTP callback mode. This week, we are going to tell you how to write your first PHP script working in HTTP callback mode.
From time to time, Yoctopuce support receives questions from customers who do not quite know what to do with the three wires coming out of a PNP or NPN sensor. This week, we are going to tell you how these NPN and PNP outputs work, how to connect them, and with which modules.
Among the requests that we received in the past few weeks, one caught our attention more particularly: how to interface a Wiegand RFID badge reader via USB, using Yoctopuce modules. It's interesting because Wiegand readers are widely spread in access control systems, and they are readily and quite cheaply available on the net. The good news is that we now have a solution, using a simple Yocto-Serial.
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