--- title: "Someone made a literal credit card-sized ESP32 computer, and so can you" url: https://daily.dev/posts/someone-made-a-literal-credit-card-sized-esp32-computer-and-so-can-you-b1x1lp4ln source_url: https://www.xda-developers.com/someone-made-a-literal-credit-card-sized-esp32-computer-and-so-can-you type: article source: "XDA Developers" published: 2026-05-09T03:53:13.133Z updated: 2026-05-09T03:53:41.587Z tags: ["hardware", "iot", "embedded"] reading_time: 2 upvotes: 0 comments: 0 language: 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. # Someone made a literal credit card-sized ESP32 computer, and so can you **[XDA Developers](https://daily.dev/sources/xda-developers)** · 2 min read · 0 upvotes · 0 comments ## Summary A maker named Krauseler built a fully functional computer that fits the exact dimensions of a credit card, using an ESP32-C3 processor, an e-ink display, and an NFC chip. The project was motivated by a desire to achieve true credit-card form factor — including thickness — unlike commercial 'card-sized' devices that fall short. Schematics are available on GitHub. Potential use cases include a smart home dashboard, 2FA authenticator, or NFC ticket wallet, though the creator is still brainstorming applications. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [This Credit Card Computer Follows All Dimensions](https://daily.dev/posts/this-credit-card-computer-follows-all-dimensions-ne38nblpp) · Hackaday · 7 upvotes · 0 comments - [This Credit Card-Sized Linux Box Has a Keyboard, Camera, and AI Capability](https://daily.dev/posts/this-credit-card-sized-linux-box-has-a-keyboard-camera-and-ai-capability-fotfxyjki) · It's Foss · 15 upvotes · 2 comments - [This fingernail-sized ESP32 dev board ignores several design rules and somehow still functions](https://daily.dev/posts/this-fingernail-sized-esp32-dev-board-ignores-several-design-rules-and-somehow-still-functions-x1qtm1cwc) · XDA Developers · 0 upvotes · 0 comments - [An ESP32-S3 e-paper development board with 3.97-inch touchscreen, LoRa, and NFC](https://daily.dev/posts/an-esp32-s3-e-paper-development-board-with-3-97-inch-touchscreen-lora-and-nfc-j6zceqyxi) · CNX Software · 0 upvotes · 0 comments - [Kode Dot — The all-in-one pocket-size maker device](https://daily.dev/posts/kode-dot-the-all-in-one-pocket-size-maker-device-6nfu9ezfd) · Hacker News · 1 upvotes · 0 comments --- Tags: [#hardware](https://daily.dev/tags/hardware), [#iot](https://daily.dev/tags/iot), [#embedded](https://daily.dev/tags/embedded) [View this post on daily.dev](https://daily.dev/posts/someone-made-a-literal-credit-card-sized-esp32-computer-and-so-can-you-b1x1lp4ln)