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  "path": "/2026/03/09/sayodevice-o3c-3-key-hall-effect-keypad-boasts-8000hz-polling-rate-for-playing-rhythm-games/",
  "publishedAt": "2026-03-09T09:06:15.000Z",
  "site": "https://www.cnx-software.com",
  "tags": [
    "Hardware",
    "Video",
    "WCH",
    "gaming",
    "keyboard",
    "oled",
    "risc-v",
    "switch",
    "usb",
    "wifi",
    "SayoDevice O3C 3-Key Hall-effect keypad boasts 8,000Hz polling rate for playing rhythm games",
    "CNX Software - Embedded Systems News"
  ],
  "textContent": "While searching for new products on AliExpress, I came across the SayoDevice OSU O3C, which looks very similar to other macro keyboards such as the 4xMacropad, the LILYGO TTGO T-Encoder, or the T-Keyboard-S3. However, like the TENSTAR T-Display, it sold over 10,000 pieces on Aliexpress. This warranted an investigation, and I found that it is actually a Hall-effect keypad mainly designed for rhythm and single-input games such as osu! and Geometry Dash. The keypad features OUTEMU magnetic Hall-effect switches with rapid trigger support and a customizable actuation point as low as 0.05 mm, for extremely fast and precise keystrokes. The keyboard connects to a PC via a USB 2.0 cable and supports an 8,000 Hz polling rate for low input latency. The device includes a 0.96-inch IPS color display that can show key travel information, key press counts, or custom images and text, and the first line of the screen [...]\n\nThe post SayoDevice O3C 3-Key Hall-effect keypad boasts 8,000Hz polling rate for playing rhythm games appeared first on CNX Software - Embedded Systems News.",
  "title": "SayoDevice O3C 3-Key Hall-effect keypad boasts 8,000Hz polling rate for playing rhythm games"
}