What the card does
->这张名片的功能
The card is exactly what it sounds like: a business-card-sized PCB with an NFC antenna and a microcontroller. When you tap it against a phone or any NFC reader, the field powers the chip, letting it transmit data. No battery, no charging, no moving parts. The developer didn't share detailed specs in the post, but the concept is straightforward — a self-contained, passive device that can carry a small payload.
Translation:这张名片正如其名：一张名片大小的PCB，带有NFC天线和微控制器。当您将其靠近手机或任何NFC读取器时，磁场为芯片供电，使其能够传输数据。无需电池、无需充电、没有活动部件。开发者在帖子中没有分享详细规格，但概念很简单——一个自包含的被动设备，可以携带少量数据。
Then the market snapshot div. We need to translate the text inside but keep the styles. The div has inline styles. We'll keep the structure and translate the labels. Original:📊 Market Data Snapshot
📊 市场数据快照
That payload is the interesting part. In its simplest form, the card could store a URL, a vCard, or a short text string. But the MCU opens up more flexible uses — it could generate a one-time code, respond to a challenge, or hold a static public key. The business card format is a clever distribution mechanism: tap to share, no app required.
Translation:数据负载才是有趣的部分。在最简单的形式下，这张名片可以存储URL、电子名片或短文本字符串。但MCU带来了更灵活的用途——它可以生成一次性代码、响应挑战或保存静态公钥。名片格式是一种巧妙的传播机制：轻触即可分享，无需应用程序。
Hacker News reception
->Hacker News上的反响
The Show HN post drew 88 points and 8 comments. That's a modest but respectable showing for a niche hardware project. The comments, as far as the public thread shows, focused on the design and the power budget — the usual mix of curiosity and skepticism you'd expect from a community that's seen plenty of NFC gimmicks. The traction suggests genuine interest, but it's not the kind of post that breaks out of the hardware bubble.
Translation:Show HN帖子获得了88个点赞和8条评论。对于一个小众硬件项目来说，这是一个适度但值得尊敬的成绩。从公开的讨论串
