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“Last post I described a subcircuit that would take an audio signal from maybe 50K to below audible frequencies and turn it into a square wave—useful for turning audio into a clock signal for an MPU. It worked, but …

“Magnetic-Levitation-Object with only an ESP32Pico M5Stack „ATOM LITE/MATRIX,” a modified simple 5V-relais and a Hall-sensor. Magnetic-Levitation-Object with only … an ESP32Pico M5Stack „ATOM LITE“ or „ATOM MATRIX“ a modified simple 5V-relais and a HALL-sensor A1302/A1308. The wooden carrier …

“The usual approach to radiation detection is the use of a Geiger-Müller tube and its high voltage circuit requirements, but during a quick surf through the internet today, I came across this portable and “accurate looking” solution developed by Stefan …

“One of the often-overlooked means of improving the coverage of an amateur radio repeater is the use of multiple receivers in a voting configuration. It’s often the case that a user can hear the repeater fine, but for whatever …

“I wanted to design a logic probe as a tutorial, but there were many good ones in the web so i have tried to design a single digit voltmeter. This circuit is a design, i am unable to test it …

“For this prototype I decided to stay with plain old through-hole packages and build the analog part in a modular way. The restriction to through-hole packages had a great influence of what parts I could use because most of the …