1. Show HN: I made a discrete logic network card Total comment counts : 18 Summary The article discusses the author’s progress in building a complete computer system using discrete logic components. They have built a physical level adapter to convert Ethernet signals to SPI and back, and they are now implementing a MAC layer module to connect it to their homebrew computer. The receiver operation involves converting serial SPI data into a stream of bytes and writing them into a static RAM buffer....

1. PumpkinOS, a Re-Implementation of PalmOS Total comment counts : 17 Summary PumpkinOS is a re-implementation of PalmOS that runs on modern architectures. It is not an emulator and does not require a PalmOS ROM. It can run m68K PalmOS applications and includes applications such as Launcher, Preferences, Command, AddressBook, MemoPad, ToDoList, and DateBook. The source code for these applications were adapted from PalmOS SDks. PumpkinOS is licensed under GPL v3 and needs to be built from source....

1. A canonical Hamiltonian formulation of the Navier–Stokes problem Total comment counts : 9 Summary The article presents a Hamiltonian formulation of the isotropic Navier-Stokes problem using a minimum-action principle derived from the principle of least squares. The formulation involves varying the velocities and pressure as field quantities, constructing a conserved Hamiltonian functional, and formulating the Hamilton-Jacobi equation. The method can be applied to non-Hamiltonian problems as well. While there is no action integral that yields the Navier-Stokes equations in their usual form, a Hamiltonian formulation can still be found by considering a mathematically equivalent higher-order problem....

1. What I think about when I edit (2019) Total comment counts : 27 Summary The article discusses editing techniques for various types of writing, such as emails, short stories, and documentation. The author suggests determining the main point of the writing before editing at the sentence level and recommends writing a preamble to clarify the intended message. The principle of repeating oneself applies to restating the main point at the beginning and end of the writing....

1. M 4.8 – 2024 Whitehouse Station, New Jersey Earthquake Total comment counts : 76 Summary The Earthquake Event Page application recommends using the latest browsers and offers real-time notifications, feeds, and web services. Top 1 Comment Summary The round valley reservoir near the author’s location has been undergoing work for years. Last fall, it received authorization to be pumped back to full capacity, a process that was expected to take years....

1. Anatomy of a credit card rewards program Total comment counts : 37 Summary The article discusses the importance of interchange fees in the credit card industry. Interchange fees are charged to businesses by credit card companies and are used to incentivize customers to use their cards. These fees are not constant and vary based on factors such as the type of card being used. The article also explores how the rewards economy differs in various regions, with the United States having a robust rewards economy while Europe has fewer lucrative rewards....

1. 3D + 2D: Testing out my cross-platform WASM graphics engine Total comment counts : 38 Summary The article discusses the development of a portable, embeddable graphics framework called Renderlet. The author explains that they were inspired by WebAssembly (Wasm) and its ability to run anywhere and be embedded into various applications. They wanted to create a framework that was high-level enough for app developers to easily create graphics, while also taking advantage of the GPU for high performance....

1. Low Cost Robot Arm Total comment counts : 28 Summary This article is about a low-cost robot arm that can be built for approximately $250. The arm can be controlled by building a second robot arm, referred to as the “leader arm,” which controls the first arm, known as the “follower arm.” The design of the leader arm is inspired by the GELLO project but is simpler to construct. The robot arm is well-suited for robot learning, and it can also fold clothes....

1. LLaMA now goes faster on CPUs Total comment counts : 44 Summary The article discusses improvements made to the llamafile project, which is a local language model project started by Mozilla. The author has written new matrix multiplication kernels for llamafile, which enable it to read prompts and images faster. These improvements result in a significant increase in performance, with prompt evaluation time going anywhere between 30% and 500% faster when using certain weights on CPUs....

1. Guess my RGB Total comment counts : 57 Summary error Top 1 Comment Summary The article discusses an optimal strategy for solving a problem where you cannot see the color but only the answers when you click submit. The current strategy, called hillclimbing, suggests moving to the right until the score drops, and then moving one to the left. This strategy results in around 9 tries per slider and 27 tries per color on average....