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You can buy this DIY kit at buildcircuit.net.
EasyEDA: Ideas for Circuit Design, Innovation for Electronics Access
Free Circuit Design: Schematic - Simulation - PCB Layout - Gerber Viewer
JLCPCB Prototype & Small-batch PCB: Only $2 for 10pcs 10×10cm PCBs, 24 hours Quick Turn, DHL Delivery in 3 Days