【文章标题】：Show HN: Open-Source eInk Bike Computer
【文章标题】：Show HN：开源电子墨水自行车码表
【文章正文】：
Strengths
【优势】
- A 4.7” e-paper panel that is readable in direct sunlight
- 4.7英寸电子墨水屏，阳光直射下仍清晰可读
- An SD card slot for offline maps, routes, ride files and logs
- 配备SD卡槽，可存储离线地图、路线、骑行文件及日志
- GPS, capacitive touch, a front light, battery and USB-C on one board
- 单板集成GPS、电容触控、前灯、电池和USB-C接口
- Bluetooth 5 for heart-rate, power and cadence sensors
- 蓝牙5.0支持连接心率、功率和踏频传感器
- Firmware can be installed from a desktop Chromium browser over USB
- 可通过USB连接Chromium浏览器刷入固件
Tradeoffs
【妥协之处】
- No pressure sensor. There’s no barometric altimeter, so climbing is derived from elevation baked into the map tiles rather than measured — total ascent is an estimate.
- 无气压传感器。缺少气压高度计，爬升数据依赖地图预设海拔而非实测——总爬升量为估算值
- Basic GPS. The receiver works, but a modern multi-band module would lock on faster and hold a fix better under tree cover or between buildings.
- 基础GPS模块。虽可定位，但现代多频模块在树荫或建筑间能更快锁定并保持信号
- No magnetometer. Without a compass the map can only orient from your direction of travel, so it can’t point the right way while you’re stopped.
- 无磁力计。缺失电子罗盘，地图仅能按行进方向定位，静止时无法正确指向
- Measured baseline: about eight hours. A 1,500 mAh build ran for roughly 7.4 usable hours with the front light off. Power work is ongoing, so newer builds may differ.
- 实测续航约8小时。关闭前灯时，1500mAh电池版本可持续使用7.4小时。功耗优化持续进行中，新版或有所不同
- Weak hardware buttons. Most interaction goes through the touch panel, which is fiddly with winter gloves or in the rain.
- 物理按键体验不佳。主要依赖触控操作，戴冬季手套或雨天使用不便
- No waterproofing. The board ships bare with no seal or IP rating, so it needs a case or a bag of its own before you ride it in the wet.
- 无防水设计。主板裸露无密封/IP等级，雨天骑行需自备防护壳或防水袋