{"id":15142104,"url":"https://github.com/robcranfill/faker-counter","last_synced_at":"2026-02-23T04:32:58.823Z","repository":{"id":208825204,"uuid":"705753221","full_name":"RobCranfill/faker-counter","owner":"RobCranfill","description":"A fake Geiger counter!","archived":false,"fork":false,"pushed_at":"2023-11-23T18:02:44.000Z","size":14182,"stargazers_count":1,"open_issues_count":0,"forks_count":0,"subscribers_count":2,"default_branch":"main","last_synced_at":"2025-06-15T04:08:35.406Z","etag":null,"topics":["adafruit","adafruit-feather","circuitpython","raspberry-pi-pico"],"latest_commit_sha":null,"homepage":"","language":"Python","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"gpl-3.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/RobCranfill.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,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2023-10-16T16:16:47.000Z","updated_at":"2023-11-23T13:07:32.000Z","dependencies_parsed_at":"2024-11-01T11:40:51.366Z","dependency_job_id":"e22a405a-6788-4701-8b87-cf7348d2fa91","html_url":"https://github.com/RobCranfill/faker-counter","commit_stats":{"total_commits":38,"total_committers":2,"mean_commits":19.0,"dds":0.3421052631578947,"last_synced_commit":"64785d1ad384c6e91db094618b221450cb8cb66b"},"previous_names":["robcranfill/faker-counter"],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/RobCranfill/faker-counter","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/RobCranfill%2Ffaker-counter","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/RobCranfill%2Ffaker-counter/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/RobCranfill%2Ffaker-counter/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/RobCranfill%2Ffaker-counter/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/RobCranfill","download_url":"https://codeload.github.com/RobCranfill/faker-counter/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/RobCranfill%2Ffaker-counter/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":259919461,"owners_count":22932073,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","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":["adafruit","adafruit-feather","circuitpython","raspberry-pi-pico"],"created_at":"2024-09-26T09:22:51.913Z","updated_at":"2025-10-21T06:51:59.082Z","avatar_url":"https://github.com/RobCranfill.png","language":"Python","funding_links":[],"categories":[],"sub_categories":[],"readme":"# faker-counter\nA prop Geiger counter.\n\nThis is a fake Geiger counter I used as part of my Halloween costume in 2023. I went as \"Oppenclimber\",\na mashup of J. Robert Oppenheimer (suit \u0026 tie, fedora, pipe, security badge, radiation goggles) and a \nrock climber (climbing harness \u0026 gear). I also carried this device, which has a speaker that plays actual\ndigitized sounds of a real Geiger counter at two different levels: a \"background\" level of a few quiet clicks,\nand a \"high\" level of crazy clicks; the level is controlled by a somewhat-inconspicuous button that you push \nwhile pointing a \"sensor wand\" that actually does nothing. It also has two LEDs - green and red, for low and\nhigh levels - and a little analog voltmeter whose needle swings in accordance with the clicking.\n\n\n### Hardware\n* CircuitPython microcontroller (needs to support I2S for audio - 3 GPIO pins)\n  * The prototype, on a solderless breadboard, used an [Adafruit Feather RP2040](https://www.adafruit.com/product/4884).\n  * The second, final, version used a [Raspberry Pi Pico](https://www.adafruit.com/product/5544).\n    * The only downside to the Pico is that the onboard storage was so much less, I had to create downsampled versions of the audio files. Which still sounded fine - you don't need much bandwidth for a bunch of clicking!\n* 3 watt I2S audio amp, such as an [Adafruit MAX98357A](https://www.adafruit.com/product/3006)\n* Push button to increase click rate.\n* Surplus analog voltmeter, 5 volts full scale.\n* Green LED for low activity, red LED for high.\n* Small speaker. I used an [Adafruit 3W 4 Ohm speaker](https://www.adafruit.com/product/4445)\n* 3 resistors, 1 diode, 1 capacitor (see schematic below).\n* A box; I used a second-hand cash box.\n* Some kind of speaker grill to hide the hole in the box. I used a piece of open-cell foam.\n* USB battery pack.\n* Old broken non-contact voltage tester as the \"sensor\".\n* A nice braided USB cable as the \"sensor\" cable.\n* Stickers! I also created artwork which I then printed at a local photo kiosk and glued them on.\n* [Solderless breadboard](https://www.adafruit.com/product/64) \u0026 [leads](https://www.adafruit.com/product/153), or [\"perma-proto\" board](https://www.adafruit.com/product/1609) \u0026 solder.\n\n\n### Circuit Diagram\n\u003cimg src=\"doc_images/FakerCounter.png\" width=\"382\"\u003e\u003cbr\u003e\n\n\n### Software\nCircuitPython (version 8.2.7 used), of course! Plus the code included here. There are no additional Python libraries to install!\n\n# Finished Project\n\u003cimg src=\"doc_images/fakercounter.jpeg\"   width=\"382\" title=\"The finished project\"\u003e\u003cbr\u003e\n\u003cimg src=\"doc_images/board_overall.jpeg\"  width=\"382\" title=\"The prototyped circuit\"\u003e\u003cbr\u003e\n\u003cimg src=\"doc_images/case_no_board.jpeg\"  width=\"382\" title=\"Case and battery pack\"\u003e\u003cbr\u003e\n\u003cimg src=\"doc_images/assembled.jpeg\"      width=\"382\" title=\"Ready to be buttoned up\"\u003e\u003cbr\u003e\n\u003cimg src=\"doc_images/case_outside.jpeg\"   width=\"382\" title=\"Stickers!\"\u003e\u003cbr\u003e\n\u003cimg src=\"doc_images/finished_front.jpeg\" width=\"382\" title=\"The front end\"\u003e\u003cbr\u003e\n\u003cimg src=\"doc_images/sensor_closeup.jpeg\" width=\"382\" title=\"Bogus sensor\"\u003e\u003cbr\u003e\n\u003cimg src=\"doc_images/permaproto.jpeg\"     width=\"382\" title=\"Perma-Proto version\"\u003e\u003cbr\u003e\n\n\n# References, Notes\n* Thanks to [Paul Price](https://www.eevblog.com/forum/projects/build-an-analogue-vu-meter-with-a-normal-voltmeter/msg872064/#msg872064) for the VU circuit.\n * It's not as loud as I'd like. In my Halloween party setting, it was just loud enough.\n \n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Frobcranfill%2Ffaker-counter","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Frobcranfill%2Ffaker-counter","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Frobcranfill%2Ffaker-counter/lists"}