This project showcases a DIY physical Pomodoro timer built using an ESP32 microcontroller and an e-paper display. The device allows users to easily start, pause, and reset their focused work intervals and breaks. The e-paper screen clearly displays the remaining time and the current Pomodoro state (work or break). The code, available on GitHub, is designed to be customizable, allowing users to adjust the durations of work and break periods. The use of an e-paper screen makes it low-power and easily readable in various lighting conditions.
Collapse OS is a minimal, highly adaptable operating system designed for a post-apocalyptic scenario where global supply chains have broken down. It aims to be runnable on minimal and easily scavenged hardware, using widely available Z80 processors. Its functionality focuses on essential tasks like bootstrapping other, more complex systems, creating and running simple programs, and interfacing with rudimentary hardware like text terminals and floppy drives. The project anticipates a future where readily available modern hardware and software are no longer accessible, and seeks to provide a digital life raft by relying on robust, easily reproduced technologies.
Hacker News users discussing Collapse OS express skepticism about its practicality and usefulness. Many question the likelihood of a societal collapse severe enough to render existing technology useless, while others point out the difficulty of bootstrapping complex technology from salvaged parts in a post-apocalyptic scenario. Some find the project interesting as a thought experiment or a hobby, but doubt its real-world applicability. A few commenters express concerns about the project's potential to attract a "doomer" mentality. The overall sentiment is one of cautious curiosity mixed with significant doubt about the project's premise and viability.
This blog post details how to create a simple WAV file audio player using a Raspberry Pi Pico and a VS1053B audio decoder chip. The author outlines the hardware connections, provides the necessary MicroPython code, and explains the process of converting WAV files to a suitable format for the VS1053B using a provided Python script. The code initializes the SPI bus, sets up communication with the VS1053B, and then reads and sends the WAV file data to the decoder for playback. The project offers a straightforward method for adding audio capabilities to Pico projects.
Hacker News users discussed the practicality and limitations of the Raspberry Pi Pico as an audio player. Several commenters pointed out the Pico's limited storage, suggesting SD card solutions or alternative microcontrollers like the ESP32 with built-in flash. Others questioned the need for code to handle WAV file parsing, advocating for simpler PCM data streaming. Some users expressed interest in using the project for specific applications like playing short notification sounds or chiptune music. The discussion also touched upon the Pico's suitability for audio synthesis and the potential of the RP2040 chip.
Berlin Swapfest is an electronics flea market held multiple times a year near Alexanderplatz, Berlin. It's a place for hobbyists, tinkerers, and professionals to buy, sell, and swap electronic components, tools, and gadgets, ranging from vintage computers and oscilloscopes to resistors and capacitors. Entrance is free for visitors. Vendors can rent tables to sell their wares, creating a vibrant marketplace for all things electronic.
Hacker News users reacted positively to the Berlin Swapfest announcement. Several expressed interest in attending or wished they could, with some lamenting the lack of similar events in their own locations (particularly in the US). Some users reminisced about past swap meets and the unique atmosphere and finds they offered. One commenter pointed out the potential benefits for hobbyists and repair enthusiasts seeking specific parts, contrasting it with the often limited and expensive options available online. The overall sentiment was one of nostalgia and appreciation for the opportunity to engage with a community of like-minded electronics enthusiasts.
The blog post "A vending machine, on the internet" explores the concept of building a virtual vending machine using readily available web technologies. It details the author's project, which combines a physical interface (buttons and a display) with a web backend to simulate a real-world vending machine experience. The project uses a Raspberry Pi to control the physical components and communicates with a web server to manage inventory, process transactions, and deliver virtual "goods" like access codes or digital downloads. The post highlights the simplicity and accessibility of building such a project with tools like HTML, CSS, JavaScript, and Python, showcasing a fun and practical application of web development beyond traditional websites.
Hacker News users generally expressed enthusiasm for the internet-connected vending machine project. Several praised the creator's ingenuity and the "whimsical" nature of the project. Some commenters discussed the technical aspects, focusing on the use of a Raspberry Pi and the potential vulnerabilities of exposing such a device to the internet. Others shared similar personal projects, like controlling Christmas lights remotely. A few raised concerns about security and the practicality of the setup, questioning the real-world use cases beyond a fun experiment. There was also a short discussion about the cost-effectiveness of the hardware choices.
A hobbyist detailed the construction of a homemade polarimetric synthetic aperture radar (PolSAR) mounted on a drone. Using readily available components like a software-defined radio (SDR), GPS module, and custom-designed antennas, they built a system capable of capturing radar data and processing it into PolSAR imagery. The project demonstrates the increasing accessibility of complex radar technologies, highlighting the potential for low-cost environmental monitoring and other applications. The build involved significant challenges in antenna design, data synchronization, and motion compensation, which were addressed through iterative prototyping and custom software development. The resulting system provides a unique and affordable platform for experimenting with PolSAR technology.
Hacker News users generally expressed admiration for the project's complexity and the author's ingenuity in building a polarimetric synthetic aperture radar (PolSAR) system on a drone. Several commenters questioned the legality of operating such a system without proper licensing, particularly in the US. Some discussed the potential applications of the technology, including agriculture, archaeology, and disaster relief. There was also a technical discussion about the challenges of processing PolSAR data and the limitations of the system due to the drone's platform. A few commenters shared links to similar projects or resources related to SAR technology. One commenter, claiming experience in the field, emphasized the significant processing power required for true PolSAR imaging, suggesting the project may be closer to a basic SAR implementation.
This project showcases WiFi-controlled RC cars built using ESP32 microcontrollers. The cars utilize readily available components like a generic RC car chassis, an ESP32 development board, and a motor driver. The provided code establishes a web server on the ESP32, allowing control through a simple web interface accessible from any device on the same network. The project aims for simplicity and ease of replication, offering a straightforward way to experiment with building your own connected RC car.
Several Hacker News commenters express enthusiasm for the project, praising its simplicity and the clear documentation. Some discuss potential improvements, like adding features such as obstacle avoidance or autonomous driving using a camera. Others share their own experiences with similar projects, mentioning alternative chassis options or different microcontrollers. A few users suggest using a more robust communication protocol than UDP, highlighting potential issues with range and reliability. The overall sentiment is positive, with many commenters appreciating the project's educational value and potential for fun.
Paxo is a DIY mobile phone kit designed for easy assembly and customization. It features a modular design based on open-source hardware and software, promoting repairability and longevity. The phone focuses on essential functionalities like calling, texting, and basic apps, while prioritizing privacy and security through minimized data collection. Its e-ink screen contributes to extended battery life and readability in sunlight. Paxo aims to provide a sustainable and transparent alternative to mainstream smartphones, empowering users to control their technology.
HN users generally expressed interest in the Paxo DIY phone, praising its open-source nature and potential for customization. Several commenters, however, questioned the practicality of building one, citing the complexity and cost involved compared to readily available, affordable phones. Some discussed the niche appeal, suggesting it would primarily attract hobbyists and security-conscious users. The repairability and potential for longevity were highlighted as positives, while the lack of cellular connectivity in the initial version was noted. A few comments touched upon the regulatory hurdles for broader adoption and the challenges of achieving competitive performance with DIY hardware. The overall sentiment leans towards cautious optimism, acknowledging the project's ambition while recognizing the significant challenges it faces.
Summary of Comments ( 46 )
https://news.ycombinator.com/item?id=43514383
HN users generally praised the project's clean design and execution. Several commenters appreciated the minimalist aesthetic and focus on a single function, contrasting it favorably with more complex, app-based timers. Some suggested improvements like adding a physical button for starting/stopping or integrating features like task tracking. The choice of e-paper display was also well-received for its low power consumption and clear readability. A few users expressed interest in purchasing a pre-built version, while others were inspired to create their own versions based on the open-source design. Some discussion revolved around the value of physical versus digital timers, with proponents of physical timers citing the benefits of tactile feedback and reduced distractions.
The Hacker News post "Show HN: Physical Pomodoro Timer with ESP32 and e-paper screen" linking to a GitHub project for a physical Pomodoro timer has generated several comments, discussing various aspects of the project and Pomodoro technique in general.
Several commenters express appreciation for the physical nature of the timer, contrasting it with software-based solutions. They highlight the benefit of having a dedicated, tangible device to manage focus and avoid the distractions often associated with computer screens. One commenter specifically mentions that physical timers reduce context switching and prevent accidentally getting sucked into browsing or other unproductive activities while trying to set a timer.
There's a discussion around the chosen components and potential improvements. One commenter suggests using a larger e-ink display for better readability. Another discusses the power efficiency of e-ink and how it makes the project well-suited for battery operation. There's also a suggestion to add haptic feedback for a more tactile experience when the timer completes.
The conversation also touches on alternative implementations and existing products. One user mentions a similar project using an old Pebble smartwatch, highlighting the repurposing of older hardware. Another points to commercially available Pomodoro timers, raising the question of whether building one is always the best approach. A comment also mentions other timer-related projects on platforms like Thingiverse.
Some comments delve into the Pomodoro technique itself, sharing personal experiences and modifications. One commenter explains how they adjust the timer durations to better suit their work style. Another discusses the benefits of the technique for managing procrastination and maintaining focus.
Finally, there are a few comments related to the aesthetics and design of the timer. Some users praise the clean and simple look of the device, while others suggest potential enhancements like different case designs or color schemes.