--- title: A Keyboard With No Keys | daily.dev description: A hardware hacker built a keyless keyboard that uses audio pulses to transmit text from a smartphone browser to a computer. The system works by converting text... canonical: https://daily.dev/posts/a-keyboard-with-no-keys-u7ispwar2 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: A Keyboard With No Keys | daily.dev og:description: A hardware hacker built a keyless keyboard that uses audio pulses to transmit text from a smartphone browser to a computer. The system works by converting text... og:url: https://daily.dev/posts/a-keyboard-with-no-keys-u7ispwar2 og:image: https://api.daily.dev/og/posts/U7IsPwAR2.png og:image:alt: A Keyboard With No Keys og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # A Keyboard With No Keys **[Hackaday](https://daily.dev/sources/hackaday)** · 2 min read · 0 upvotes · 0 comments ## Summary A hardware hacker built a keyless keyboard that uses audio pulses to transmit text from a smartphone browser to a computer. The system works by converting text input in a browser into audible audio signals, which an Arduino Micro decodes and forwards to the host computer as standard USB keyboard input. The custom protocol supports variable-length messages, integrity checking, and link-state monitoring. The creator has already applied it to build a password manager. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Why is Arduino Micro a good choice for building a custom USB keyboard controller? Arduino Micro is well-suited for keyboard controllers because it has a built-in USB chip, allowing it to present itself as a standard USB HID device to a host computer without needing additional hardware. This makes it straightforward to send keystrokes directly over USB. _Makers building custom input devices find the latest Arduino project ideas on daily.dev._ ## Similar posts on daily.dev - [A Keyboard For Anything, Without A Keyboard](https://daily.dev/posts/a-keyboard-for-anything-without-a-keyboard-2pzydjh45) · Hackaday · 0 upvotes · 0 comments - [A Modular Macro Keypad](https://daily.dev/posts/a-modular-macro-keypad-seiv4ww1x) · Hackaday · 0 upvotes · 0 comments - [Bad USB: The Invisible Hardware Threat](https://daily.dev/posts/bad-usb-the-invisible-hardware-threat-eynzntkfp) · InfoSec Write-ups · 0 upvotes · 0 comments - [This Tiny USB Device Turns Your Phone Into a Keyboard, Mouse, and SSH Terminal](https://daily.dev/posts/this-tiny-usb-device-turns-your-phone-into-a-keyboard-mouse-and-ssh-terminal-gcmljxb1j) · It's Foss · 5 upvotes · 0 comments --- Tags: [#iot](https://daily.dev/tags/iot) [View this post on daily.dev](https://daily.dev/posts/a-keyboard-with-no-keys-u7ispwar2) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"A Keyboard With No Keys","url":"https://daily.dev/posts/a-keyboard-with-no-keys-u7ispwar2","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/a-keyboard-with-no-keys-u7ispwar2"},"datePublished":"2026-08-11T05:17:20.252Z","dateModified":"2026-08-11T05:17:41.880Z","description":"A hardware hacker built a keyless keyboard that uses audio pulses to transmit text from a smartphone browser to a computer. 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