Velofuso has launched two minimalist coffee products: the TREFOLO espresso machine and the TURBINA cylindrical burr grinder. TREFOLO offers a reimagined, minimalist take on the espresso machine, while TURBINA boasts an innovative cylindrical burr design. Both products highlight Velofuso's commitment to clean design and superior performance.
This blog post details the author's experience librebooting a ThinkPad T480, a process fraught with challenges. From updating the BIOS and backing up the original firmware, to using a Raspberry Pi Pico W and SOIC-8 clip to read and write the BIOS chip, and finally compiling the Libreboot firmware (encountering numerous compilation errors and seeking help from the IRC community), the author documents the entire process. The post also shares post-libreboot experiences, including performance improvements, hardware compatibility issues, and troubleshooting tips, along with recommendations for screen, RAM, and storage upgrades.
Microsoft has discontinued its Surface Studio 2+, ending its only direct competitor to Apple's iMac. The high-end all-in-one PC, aimed at creative professionals, featured a unique tilting touchscreen display. However, its high price and lagging specs hampered its success. This leaves a gap in the Windows ecosystem for premium all-in-one devices and cements Apple's dominance in this market segment.
This article introduces a clever technique to improve the performance of photodiode amplifiers: bootstrapping. The parasitic capacitance of a photodiode limits its ability to amplify rapidly changing signals. In a traditional transimpedance amplifier (TIA), this capacitance reduces bandwidth. The article analyzes the working principle of a TIA, explaining how the photodiode's parasitic capacitance affects circuit performance. The author presents a bootstrapped circuit using an op-amp and JFET, which effectively eliminates the parasitic capacitance by keeping the voltage across the photodiode terminals virtually the same, significantly improving bandwidth. The article also discusses a variant AC-coupled bootstrapped circuit and provides relevant formulas.
This project offers a simplified method for installing macOS on any computer using Proxmox VE versions 7.0 to 8.2. A single script automates the setup process, enabling users to easily run macOS versions from High Sierra to Sonoma in a Proxmox virtual machine. Cloud environment installations are also supported, and a video tutorial is available.