A motley collection of ideas
Mushroom foraging has its small but very important essentials, and one of the most important of these is a good basket. In this article, I present a practical, lightweight solution. Mushroom picking is one of my passions. Without sounding immodest, I can say that I know mushrooms quite well. I learned a great deal from … Read more
This circuit is a simple, contactless wire / mains voltage detector. It can detect 230 V mains wiring from a distance of 10–15 cm, indicated by a red LED and a buzzing sound. You can find the circuit in Tinkercad: 👉 https://www.tinkercad.com/things/cZa2iaSgAAG-wire-tracer The L1 coil is a self-supporting air-core coil. It can be made from … Read more
The purpose of this project is to extend the range of an older (and more affordable) frequency counter into the VHF and UHF bands. The idea was inspired by an article published in Rádiótechnika (1990/7, pp. 341–342), although the original circuit was designed by Zeljko Bozic, S52ZB, and later published in a 2006 issue of … Read more