{"id":13451121,"url":"https://github.com/chrisb2/key-typer","last_synced_at":"2026-05-17T02:03:51.257Z","repository":{"id":82040841,"uuid":"161862320","full_name":"chrisb2/key-typer","owner":"chrisb2","description":"Arduino program for rapidly typing characters using a Pro Micro as a USB HID keyboard, useful for stress testing text UI input fields.","archived":false,"fork":false,"pushed_at":"2019-02-06T02:35:07.000Z","size":6788,"stargazers_count":2,"open_issues_count":0,"forks_count":2,"subscribers_count":1,"default_branch":"master","last_synced_at":"2025-10-26T21:42:52.687Z","etag":null,"topics":["arduino","atmega32u4","hid","keyboard","promicro","tft-display"],"latest_commit_sha":null,"homepage":"","language":"C++","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/chrisb2.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null}},"created_at":"2018-12-15T02:33:56.000Z","updated_at":"2024-06-24T16:49:11.000Z","dependencies_parsed_at":null,"dependency_job_id":"98a73c2a-5eb4-4505-bbf2-0659ff77a359","html_url":"https://github.com/chrisb2/key-typer","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/chrisb2/key-typer","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/chrisb2%2Fkey-typer","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/chrisb2%2Fkey-typer/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/chrisb2%2Fkey-typer/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/chrisb2%2Fkey-typer/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/chrisb2","download_url":"https://codeload.github.com/chrisb2/key-typer/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/chrisb2%2Fkey-typer/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":33125183,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-05-16T18:38:32.183Z","status":"online","status_checked_at":"2026-05-17T02:00:05.366Z","response_time":107,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["arduino","atmega32u4","hid","keyboard","promicro","tft-display"],"created_at":"2024-07-31T07:00:48.487Z","updated_at":"2026-05-17T02:03:51.211Z","avatar_url":"https://github.com/chrisb2.png","language":"C++","funding_links":[],"categories":["C++"],"sub_categories":[],"readme":"# key-typer\nArduino program and hardware for rapidly typing characters using a [Pro Micro - 5V/16MHz](https://www.sparkfun.com/products/12640) as a [USB Human Interface Device](https://en.wikipedia.org/wiki/USB_human_interface_device_class) (HID) keyboard. Based on [Turn your Pro Micro into a USB Keyboard/Mouse](https://www.sparkfun.com/tutorials/337). The device has been tested and works on Linux, Mac and Windows.\n\nI built this to aid in debugging a textarea in a web page which was intermittently dropping characters in IE11 due to a Javascript issue.\n\nWhen manually typing at the keyboard, it's hard to tell if intermittent character loss is due to a bug, or because the keys were not pressed properly. In addition manual typing speed is limited, so its not possible to do 'stress' testing. This device solves both these problems by emulating a USB keyboard and generating characters programmatically.\n\nThere are three adjustable parameters available via the buttons:\n\n- Lines - the number of lines of text to output (-1, 1, 2, 4). The default is -1 (unlimited).\n- Characters - the number of characters in each line (5, 13, 26, 52, 104). The default is 26 (a-z).\n- Rate - the rate of character generation in characters/minute (100, 200, 400, 1000, 6000). The default is 200 (average typist). 100 is a slow typist, 400 is a professional typist and anything higher is not humanly possible!\n\nThese parameters may be adjusted while characters are being generated. Character generation is started and stopped with the toggle switch. A video of the device in action is [here](https://s3-us-west-2.amazonaws.com/public.7777/key-typer-in-action.mp4).\n\n![Picture](./docs/key-typer.jpg)\n\nThis is the schematic for the project. If the schematic appears to be missing details, download it and view it locally,\nor zoom the web page.\n\n![Circuit Schematic](./docs/key-typer-schematic.svg)\n\nThe code in repository has the configuration files to allow it to be imported into the PlatformIO development environment, alternatively it may be edited in the Arduino IDE.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fchrisb2%2Fkey-typer","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fchrisb2%2Fkey-typer","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fchrisb2%2Fkey-typer/lists"}