可重复使用电路板，通过导电环氧重写线路，减少电子制造浪费。
PCB Renewal: Iterative Reuse of PCB Substrates for Sustainable Electronic Making
- 用导电环氧选择性覆盖旧线路，将其转为导电平面以支持新布线。
- 单块电路板经四次迭代复用，电气性能与机械耐久性达标。
- 适合环保型电子设计、创客项目及可持续硬件开发人群。
印刷电路板（PCB）通常为一次性使用，导致电子制作中产生大量材料浪费。本文提出PCB Renewal技术，通过选择性沉积导电环氧，实现对旧线路的“擦除”与“重构”，将孤立走线转化为导电平面，从而支持新线路布局。我们构建了全流程工作流，评估其电气性能与机械耐用性，并建模其可持续性影响，涵盖材料消耗、成本、能耗及时间节省。开发了一款软件插件，可指导环氧沉积路径、生成更新后的PCB版图并计算资源使用量。为验证其有效性与通用性，我们在一个电路板上完成四次设计迭代，涵盖相机滚轮、WiFi无线模块和ESPboy游戏机三个项目。此外，还演示了外协双层板的再配置：从LED手表改造为互动猫玩具。论文最后讨论了局限性与未来方向。
原文摘要 · Abstract (English)
PCB (printed circuit board) substrates are often single-use, leading to material waste in electronics making. We introduce PCB Renewal, a novel technique that "erases" and "reconfigures" PCB traces by selectively depositing conductive epoxy onto outdated areas, transforming isolated paths into conductive planes that support new traces. We present the PCB Renewal workflow, evaluate its electrical performance and mechanical durability, and model its sustainability impact, including material usage, cost, energy consumption, and time savings. We develop a software plug-in that guides epoxy deposition, generates updated PCB profiles, and calculates resource usage. To demonstrate PCB Renewal's effectiveness and versatility, we repurpose a single PCB across four design iterations spanning three projects: a camera roller, a WiFi radio, and an ESPboy game console. We also show how an outsourced double-layer PCB can be reconfigured, transforming it from an LED watch to an interactive cat toy. The paper concludes with limitations and future directions.
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