New hobby? Let’s measure the radioactivity of objects and natural materials. Why, how, and with what?
Measuring ionizing radiation (generally radiation) is relevant today not only for experts but also for enthusiasts or collectors of minerals and antiques. Ionizing radiation is invisible, imperceptible, and that makes it deceptive. However, it has a direct impact on human health and the environment. This article will explain why and how we measure radiation, what interesting aspects to observe during measurement, which dangerous products to watch out for, and what misinformation exists in the media and online.
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Raspberry Pi CM0: new module with RP3A0 system in packaging
The CNX Software portal highlighted the yet-to-be-officially-released Raspberry Pi Compute Module 0 (CM0). This is a compact development module in a “castellated” design, based on the SiP (System-in-Package) RP3A0, which…
Internet radio receiver with ESP32. Complete guide including 3D printing. Home Assistant support included.
The YoRadio project is an open-source internet radio built on the ESP32 Wi-Fi and Bluetooth chip with the ESP32-audioI2S library. It features complete documentation, a wide range of supported displays,…
I didn’t expect that. I can throw away a third of my USB-C cables. They lack the connected signals, and I found out thanks to this tester.
Who hasn’t experienced this? You need to quickly charge your phone, plug it in, and after an hour, there’s only a 10% increase. Or you want to transfer data to…
Interesting. A switched regulator in a TO3 package, for example for eight-bit computers.
Are you interested in 8-bit computers? Facebook suggested an interesting project shared in a group of enthusiasts who are passionate about 8-bits. Linear regulators in TO3 packages are used in…
We program ultra-low-cost microcontrollers CH32V00x both in Arduino IDE and without it (Linux). Guide.
CH32V microcontrollers – you’ve probably heard of them. They are sold at a ridiculously low price but come with a very decent set of features, plus they are available in…
The motionEye project is alive! After many years, we have new pre-release versions.
The motionEye project is an open-source web interface designed for managing and visualizing camera systems with motion detection. It is the frontend for the popular Motion software, which is used…
ESPHome has come out with a major update. One new feature after another and many significant improvements.
ESPHome 2025.8.0 brings significant updates in hardware support and major performance improvements along with memory optimizations. Released on August 20, 2025, this update enhances the platform’s capabilities, particularly with support…
Live Image Service – create your own information ePaper display. No programming required. Step by step.
I liked the project zivyobraz.eu because it simply makes ePaper/eInk display technology accessible to regular people without programming knowledge. They can easily create their own information display. What appears on…
CO2 sensors from Sensirion. SCD30, SCD40, or STCC4? Which sensor is suitable for home use?
Sensirion, a leading manufacturer of various sensors, offers multiple types of sensors for measuring CO2 concentration. This article will explore the differences, advantages, and the best sensor for battery operation.
Flipper Zero, Keysy, Proxmark? Forget about them, now there’s Chameleon Ultra. An RFID emulator that can do a lot.
The Chameleon Ultra is a compact RFID emulator that can clone LF (125 kHz) and HF (13.56 MHz) cards. It can read, write, and be used as a communication analyzer.…