Days-18

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…
Read more

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…
Read more

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…
Read more

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….
Read more

There is a battery compartment for three A batteries (4.5 V) hidden behind the door today that will     10. Tag power the board independently of a power outlet. For economical battery operation, we have the deepsleep mode. This mode…
Read more

There is a photo transistor hidden behind the door today. We will use it to measure the ambient brightness. The potentiometer is in series with the phototransistor potentiometer in our circuit and you will be able to change the sensor…
Read more

On the eighth day you will find a potentiometer behind the door. We are going to use it as voltage divider. You can set a voltage between 0 V and 3.3 V, which is measured by the board and sent…
Read more

There is a red LED hidden behind the door today. We are going to use this to build a simple stairway light with web interface. We will thus build the following circuit and, of course, activate today’s program. Locate the…
Read more

Behind the sixth door of the Advent calendar is a 1 kOhm resistor, which we will use tomorrow. Today we will continue with Node-RED and try out the touch function of the board. As always you will select the program…
Read more

Behind the fifth door of the Advent calendar is a button and we are going to use it today in our experiment instead of the boot button. We will connect the button to pin 18 and GND in such a…
Read more