Author Archive: fk

Today we have a very special LED waiting behind the door. It is an RGB LED with integrated controller (type PL9823, equivalent to WS2812) and with it you can now connect several LEDs in series and control them individually by…
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And today we have a small diode waiting behind the door. We are going to use the diode as temperature sensor for particular high temperatures and with it we will build a small candle guard. Today’s setup consists of the…
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The door of day 17 reveals another potentiometer. Now we have one potentiometer for each LED and thus we will develop the program of Day 13, the Smart Lights, so that we will get a more convenient and intuitive dimming feature. We…
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The door today reveals the counterpart to yesterday’s component, namely an IR diode. Now you can build a real remote-control for your TV and control it conveniently via smartphone and website.  We will use the following setup. Select the program…
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The door reveals a very special component today, namely an infrared receiver module. You can use it to 15. Tag receive customary infrared remote-control signals. We will use the following setup. After the circuit is set up, select today’s program….
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The door of day 14 reveals another LED. Now we have two LEDs with resistors and two buttons and 14. Tag cables, enough to build a complex lighting system. We will use the following setup: Enable today’s program and install…
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Today we will find again a 1 kOhm resistor hidden behind the door of the Advent calendar. But we are not going to use it today. Instead I would like to show you how you can build a smart touch…
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Today we will find again a button hidden behind the door of the Advent calendar. In our experiment  today we will continue to cover the MQTT protocol, but this time in conjunction with Node-RED. We will also learn how two…
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There is a cable set again hidden behind the door today. We will need it in the next few days when the setups become more complex. Over the past few days we have sent most of our data via UDP….
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