Doomscroller.xyz

Original Article ↗ Hacker News Discussion ↗

A CNC‑machined aluminum gadget called Doomscroller offers a single oversized scroll knob that continuously scrolls content on phones and PCs, intentionally embracing “negative utility” as a tongue‑in‑cheek aid to doomscrolling. Commenters debate whether it’s purely a joke or a legitimately ergonomic tool for reading, comparing it to old Blackberry jog wheels, iPod click wheels, and niche input devices like presenter remotes and 3D controllers. The creator explains technical hurdles around smooth Bluetooth HID scrolling—especially on iOS—and notes regulatory and certification gray areas, while also enabling international shipping after initial interest from abroad.

Product concept & reactions

  • Physical “doomscrolling” gadget: a large knob that continuously scrolls content, framed as intentionally useless / negative-utility.
  • Many commenters find it hilarious and strangely tempting, praising the design and materials.
  • Others are skeptical, not understanding the point beyond a gag, or seeing it as redundant with existing input devices.

Technical implementation & platform support

  • Built around an ESP32-style platform with USB-C and Bluetooth; ESP32 can theoretically run Doom.
  • Works smoothly on Android and PC; iOS support is limited and “not buttery smooth.”
  • Standard USB-HID mouse scrolling is constrained by legacy assumptions: one wheel detent → ~40px scroll, causing chunky movement.
  • High-resolution scrolling on specialty mice relies on custom drivers that aren’t present on Android.
  • The device instead emulates a one-finger touchpad with absolute coordinates, repeatedly simulating finger drag gestures.
  • Bluetooth Low Energy latency (~8–20 ms) complicates very smooth, high-frequency updates.

Use cases & ergonomics

  • Some see it as surprisingly useful for reading long-form content or ebooks, especially when lying down or trying to reduce hand strain.
  • Others argue a Bluetooth mouse, presenter clicker, or page-turner is more practical.
  • Suggestions include adding page-up/down buttons, clicky detents for paging, metrics (miles scrolled, calories burned), or making it only scroll downward as an anti-feature.

Hardware comparisons & alternatives

  • Extensive nostalgia for older devices with scroll wheels or jog dials: Sony Ericsson / Clié, BlackBerry, trackballs, iPod wheel, Apple Watch crown.
  • Mentions of PC-oriented knobs and pedals: Surface Dial, Razer control pods, 3Dconnexion SpaceMouse, Griffin PowerMate, USB foot pedals.
  • Some say there are already cheap VR controllers and other standalone scroll knobs that serve a similar purpose.

Manufacturing, legal, and business aspects

  • CNC-machined aluminum enclosure; small one-person project that cost a few hundred dollars to develop.
  • Uses pre-certified radio modules; commenters debate FCC requirements, noting hobbyist communities often ship small runs without formal testing.
  • No outside capital; jokes about “enshittifying” it with subscriptions or bricking on expiry.

Website & demo issues

  • Demo can be blocked by ad blockers and is not mobile-responsive; some Android users think the site “doesn’t work” until they tweak interactions.