Hardware Design

3 posts

toss3 min readCurated summary

Layers of your time : Celebrating the time spent with Toss

The article argues that effective internal branding is not about making attractive company merchandise, but about designing meaningful experiences around employees’ time and contributions. Through an eight-month redesign of Toss’s work-anniversary gift, the designer created a layered light that visually represents accumulated years, protected quality despite production delays, and carefully designed the delivery experience. The project concludes that strong internal branding requires a clear reason, end-to-end experience design, and unwavering standards. ## From Merchandise to a Celebration of Time - Toss celebrates employees’ work anniversaries with annual gifts such as medals, wine, and cubes. - Over time, some employees began giving the gifts away, suggesting they had become clutter rather than meaningful keepsakes. - The redesign aimed to: - Sincerely celebrate each employee’s time at the company. - Show appreciation for the six-month gap while the gift was being redesigned. ## Three Criteria for the New Gift The new product had to: - Avoid being immediately stored away in a drawer. - Physically show the accumulation of time. - Remain beautiful whether celebrating one year or ten years. A layered lamp was chosen because employees could add one disk for each anniversary. As the disks accumulated, the layers of light became deeper, making the passage of time visible through the object’s structure. ## Hardware Development and Quality Control - The designer had no previous hardware or lighting-production experience. - The team repeatedly tested: - Disk thickness, including differences as small as 0.5 mm. - The spacing between the lamp body and disks. - Light intensity as more disks were added. - The product was divided into two versions: - White for years 1–10. - Black from year 11 onward, symbolizing the beginning of a new period. - Dozens of defects appeared during final factory inspection. - Rather than compromise quality to meet the schedule, distribution was delayed. - Approximately 5,000 lamps were individually inspected and improved. ## Giving the Product a Warm Voice - The lamp was named **Layered Lighting**. - The phrase **“Layers of your time at toss”** was engraved on the lamp and packaging. - The communication emphasized remembrance and celebration rather than corporate motivation. - Serif typography, carefully matched packaging, and handwritten name cards created a warmer, more personal experience. ## Designing the Moment of Delivery - Instead of asking employees to pick up their gifts, the team placed them directly at employees’ desks. - The redesigned process gave employees the correct number of disks for their accumulated tenure. - The intended experience was: - Discovering the gift on a Monday morning. - Opening the box and reacting with surprise. - Taking photos and sharing the moment with colleagues. - Over one weekend, the team placed gifts at 2,500 desks among approximately 3,900 employees. - The operation took 26 hours. - Employee photos and reactions spread across Slack and Instagram, including one memorable comment: “I now have a reason to stay another year.” ## Principles of Good Internal Branding - **Start with the reason:** Every object or graphic should clearly communicate why it exists. - **Design the experience, not just the object:** The interaction begins before the product is opened and includes how it is received and shared. - **Protect the standard until the end:** Internal projects are easy to compromise because their results may not be immediately visible, making a clear standard essential. Good internal branding helps employees feel that they belong to a good team. That sense of belonging can strengthen engagement and ultimately improve the quality of the work they create.

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metaOriginal article

How We Built Meta Ray-Ban Display: From Zero to Polish (opens in new tab)

Meta's development of the Ray-Ban Display AI glasses focuses on bridging the gap between sophisticated hardware engineering and intuitive user interfaces. By pairing the glasses with a neural wristband, the team addresses the fundamental challenge of creating a high-performance wearable that remains comfortable and socially acceptable for daily use. The project underscores the necessity of iterative refinement and cross-disciplinary expertise to transition from a technical prototype to a polished consumer product. ### Hardware Engineering and Physics * The design process draws parallels between hardware architecture and particle physics, emphasizing the high-precision requirements of miniaturizing components. * Engineers must manage the strict physical constraints of the Ray-Ban form factor while integrating advanced AI processing and thermal management. * The development culture prioritizes the celebration of incremental technical wins to maintain momentum during the long cycle from "zero to polish." ### Display Technology and UI Evolution * The glasses utilize a unique display system designed to provide visual overlays without obstructing the wearer’s natural field of vision. * The team is developing emerging UI patterns specifically for head-mounted displays, moving away from traditional touch-screen paradigms toward more contextual interactions. * Refining the user experience involves balancing the information density of the display with the need for a non-intrusive, "heads-up" interface. ### The Role of Neural Interfaces * The Ray-Ban Display is packaged with the Meta Neural Band, an electromyography (EMG) wristband that translates motor nerve signals into digital commands. * This wrist-based input mechanism provides a discrete and low-friction way to control the glasses' interface without the need for voice commands or physical buttons. * Integrating EMG technology represents a shift toward human-computer interfaces that are intended to feel like an extension of the user's own body. To successfully build the next generation of wearables, engineering teams should look toward multi-modal input systems—combining visual displays with neural interfaces—to solve the ergonomic and social challenges of hands-free computing.

datadog3 min readCurated summary

Restroom hacks

Datadog built an office bathroom-availability monitor to reduce contention without compromising privacy or existing door functionality. Raspberry Pi 2 devices, GPIO-connected sensors, and simple Unix tools provided a low-maintenance way to report whether bathrooms were occupied. The project showed that the hardest parts were adapting to varied real-world hardware, mounting sensors cleanly, and dealing with unreliable Wi-Fi—not writing software. ## Project Goals - Avoid intrusive monitoring: - No cameras or sensors that could feel invasive. - Provide reliable occupancy information with minimal false positives and negatives. - Use door-lock status where possible as the occupancy signal. - Avoid interfering with existing locks and doors. - Keep devices secure, professional-looking, easy to maintain, and remotely updateable. - Treat the project as a fun hardware experiment. ## Adapting to Different Bathrooms - Bathrooms differed significantly in: - Lock styles, including push-button handles and rotary stall locks. - Number of rooms or stalls. - Availability and location of power outlets. - Wi-Fi quality, especially near concrete walls and older electrical equipment. - These variations required different sensor designs rather than one universal installation. ## Raspberry Pi and Sensor Hardware - Raspberry Pi 2 Model Bs served as the project’s controllers because they: - Ran Linux. - Supported Wi-Fi and SSH administration. - Were compact enough to conceal. - The team used several sensor types: - Magnetic reed switches for detecting door position. - Pin switches for detecting sliding stall-lock positions. - Photoresistors were purchased as a possible way to detect darkness but were not needed in the MVP. - For push-button locks, reed switches detected whether the door was open or closed. Although this could theoretically misreport a closed but unoccupied bathroom, it worked reliably in practice. - Stall-lock sensors were hidden inside hollow metal panels. Automotive-style pin switches were mounted using simple carved wooden blocks that contacted the sliding lock without obstructing it. - Wiring was concealed in wiremolding, with Raspberry Pis placed inside outlet boxes where possible. ## GPIO and Unix-Based Monitoring - Raspberry Pi GPIO pins were accessed through files in `/sys/class/gpio/`. - A Python script read sensor values and translated them into bathroom availability. - Configuration handled differences between normally open and normally closed sensors. - The service was exposed through `tcpserver` and managed with `daemontools`. - A basic command-line client could query status with Netcat, for example: ```sh nc 11.bathrooms.datadog-internal.com 50 ``` ## Making Availability Easy to Use - Employees could check status from the command line. - Some added bathroom availability to TextBar. - Datadog dashboards displayed bathroom status throughout the New York office. - The implementation required very little code; most effort went into sensor selection, physical installation, and network troubleshooting. The project demonstrates that inexpensive, hackable hardware combined with simple Linux tools can solve a practical office problem. For similar systems, prioritize non-intrusive sensors, flexible installation designs, and secure remote management; the resulting software can remain remarkably small.

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