Why??? They are so cheap these days compared to what they used to cost, why would you even bother to build your own fixtures? You will have more invested in parts and time then just buying them outright. I did build some disco lights in 1990′s. Nowadays you can buy many disco lights more cheaply than you could buy the components. DIY is makes often sense only as a learning experience or if you need something really special that is not available ready made (and can cost time and money to make). Here is my small light control board that consists of two 300W light dimmers. One device I used a l ..read more

Broken USB cables. This USB-A to USB-C cable from Biltema was cheap, but the quality and robustness could been better. I have several cables that have all broken exactly like this. I don’t remember many other USB cable that would have damaged like this. If they had used decent construction in the USB C connector, this would have been a good cable (because other cable features seemed to be good). Products in the pictures: USB-kaapeli tyypin C liittimellä USB-kaapeli tyypin C liittimell ..read more

Digitalization and software have made our lives easier and made our operations many times more efficient over the past decades. Data centers consume two to three percent of the planet’s total electricity usage now. It has considerable CO2 footprint. Various ICT solutions are responsible for 4–10 percent of annual electricity consumption and 3–5 percent of global greenhouse emissions (ICT industry climate and environmental strategy, 2021). By one estimate, consumption could jump to as much as 13 percent of the world’s total electricity demand by 2030. Everyone seems to be slowly convinced of th ..read more

Openstreetmap OpenStreetMap is the free wiki world map. https://www.openstreetmap.org/ Why use OpenStreetMap instead of Google Maps? Customization: OSM is highly customizable, allowing developers to tailor the map to their specific needs, while Google Maps and Apple Maps have more limited customization options. Data ownership: OSM is built and maintained by a community of contributors, which means the data is freely available and can be edited. Cellular network https://www.cellmapper.net/ CellMapper is a crowd-sourced cellular tower and coverage mapping service. CellMapper is a useful app for ..read more

Plastic recycling is the process of recovering waste plastic and reprocessing it into new products. It plays a crucial role in reducing the environmental impact of plastic waste by diverting it from landfills and incineration, conserving resources, and minimizing pollution. Plastic recycling is challenge. Plastic recycling has been seen so complex that lots of materials end up in landfills and plastic is often transported across the globe to find markets for the recycled materials. Recycling plastic is complex. There are many different types of plastic made from many different types of resins ..read more

Everybody knows how Internet goes through copper wiring, fiber optics and wireless? But are the other communications media that could be uses? Yes there seems to be some unexpected ways to transport data. A core part of the hacker mentality is the desire to test limits: trying out ideas to see if something interesting, informative, and/or entertaining comes out of it. What is the bandwidth of your snax? How fast is your internet in bananas? It is a common way to measure and MEME almost anything with a banana scale. There is now a banana scale for Internet speed: bananas transmit at about 53mbp ..read more

A video wall is a collection of video displays tiled together to create a large single screen, often used to view large amounts of data. Video switchers and converters are indispensable tools for video professionals. Video switchers and converters are essential tools in the realm of audiovisual production, broadcasting, and multimedia content creation. I have worked on the field and own devices on this category myself. LED video walls require specialized video processors to manage and optimize the display of content across the array of LED panels. Video processors should support a wide range o ..read more

Video switchers and converters are indispensable tools for video professionals.Video switchers and converters are essential tools in the realm of audiovisual production, broadcasting, and multimedia content creation. I have worked on the field and own devices on this category myself. Video switchers, also known as vision mixers or production switchers, are extensively used in live productions such as television broadcasts, concerts, sports events, and conferences. They enable seamless switching between multiple video sources, such as cameras, computers, and playback devices, allowing directors ..read more

I have been interested in getting a multimeter that can connect to a smart phone for some time. I write on multimeters that connect to a smartphone in my blog already in 2014. I finally bought one: UT60BT. This UT60BT multimeter is feels reliable and feature-packed tool. This meter connects to your smartphone via Bluetooth, allowing you to remotely view and log measurements. This CE-certified meter meets CAT II 1000V/CAT III 600V safety rating with rugged double-injection housing. One of the standout features of the UT60BT is its Bluetooth functionality, which allows users to connect the multi ..read more

I got from sale some probes for multimeter: Universal Multimeter Test Hook with Miniature Plane Type IC Clip and Probe Needle Versatile for High Pressure Differential Applications Accurate Readings and Secure Connectivity One end those probes have has a small clip that works with small electronics. The other end fits normal multimeter probes (2 mm diameter probe tips). Those are useful when measuring small ow voltage electronics circuits. I bought two sets of probe. One set worked flawlessly. The other set the miniature probe sometimes gets stuck down. The one that worked well felt like a qua ..read more