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The Cluster HAT interfaces a (Controller) Raspberry Pi A+/B+/2/3/4 with 4 Raspberry Pi Zeroes (NOT included). Configured to use USB gadget mode, it is an ideal tool for teaching, testing or simulating small scale clusters.
This may win the gold in terms of Ikea Hacks. Tim Molter and his friend Alex Nugent needed a ginormous amount of computational power for some projects and they wanted an inexpensive and elegant solution.“We already built a handful of dual-core headless Linux boxes and added them to our local network, but we could see that adding more would not go too far because of space limitations. What we needed was a compact and efficient design with maximal core density.
