Franzis Verlag Conrad Advent Calendar 2021

As in the last years, 2021 again has a new Conrad electronic calendar with 24 experiments for every day between the 1st and 24th century. December. The theme includes digital and analogue circuits with light and sound. It is about indicators and tone generators with the CMOS component 40106. This IC contains six Schmitt trigger inverters. It enables very different and very versatile applications, which are not only educational but also fun. In the end there is a circuit, which produces a colorful flickering of many LEDs and can be hung on the Christmas tree. This text is machine translated.