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DIY DS1302 Rotation LED Electronic Clock Kit 51 SCM Learning Board
Note: The housing does not included. How to use and how to soldering: Click to open Description: Size: 81 mm x 81 mm x 1.6 mm PCB thickness: 1.6 mm Materials: FR4 military level PCB color: blue DigitalTube display: red Power supply voltage: miniUSB, external connection 5V ,3V button battery for clock chip on the board of the standby power supply Package included: 1 x Rotation LED Electronic Clock Kit