🔧 Chain Blank — Proto Board DIY Expansion Node The Chain Blank is a Proto Board DIY expansion node in the M5Stack Chain series. On the front, it features an 18 × 18 mm universal prototyping area 🧩, perfect for building custom circuits. Inside, the PCB comes pre‑soldered with two interconnected HY2.0‑4P connectors 🔌, allowing seamless daisy‑chaining with other M5Stack Chain devices without affecting their original functionality. When you need deeper DIY integration, the two 0 Ω resistors (R1 & R2) ⚡ that link the communication pins can be removed. This frees the IO pins for direct soldering or jumper‑wire connections 🛠️, enabling richer, more flexible interactive applications. ⭐ Features 🧩 Proto Board @ 2.54 mm pitch 🔗 Fully compatible with the M5Stack Chain series 🔌 2 × HY2.0‑4P expansion interfaces for horizontal Chain‑series expansion 📦 Includes 1 × Chain Blank 1 × Chain Bridge 🚀 Applications DIY expansion for M5Stack Chain‑series devices Specifications Specification Parameter Product Size 23.9 x 23.9 x16.0mm Product Weight 7.4g Package Size 138.0 x 93.0 x 14.0mm Gross Weight 12.8g Schematics Chain Blank Schematics PDF Model Size Chain Blank Model Size PDF
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