eCO2-Traffic-Light A cheap Traffic-Light-style gas detector (ESP32 + CCS811 + 3 LEDs) that gives an indication of when to open the windows in a room with a lot of exhaled and thus possibly polluted air. The intention of this project was to have a simple device that gives an indication of when to open the […]

  Often a hobby electronics engineer with his great circuit projects remains quite unnoticed by his family and friends. The understanding and the appreciation of non-electronic engineers for e.g. a self-built oscillator or a servo control is not very big . However, I have always received a lot of praise and appreciation for my Tranquili-T […]

Magnetic-Levitation-Object that needs only … an ESP32Pico M5Stack „ATOM LITE“ or „ATOM MATRIX“ a modified simple 5V-relais and a HALL-sensor A1302/A1308. The wooden carrier is made of an embroidery frame. After I had successfully built up a “Magnetic Levitation Object” in conventional analog design and described that in article “Magnetic Levitation – The Easy Way” , I […]

A MAGNETIC LEVITATION project with no special but only standard components – including a modified cheap standard relay as the electromagnet – powered with only 50mA@5V from a USB-Powerbank A floating object is always a fascinating eye-catcher that I like to put on my desk. Many conversations at this table got off to a nice […]

A hardware and software project for a friend who loves clocks in all variants. It has  two concentric NeoPixel rings and some moving parts to form a kinetic object that can even display time in an old-fashioned „analog“ way :-). Hours are displayed on the inner ring, minutes and seconds on the outer ring.The electronics […]