HW-154 TM1638 8 Bits Digital LED Tube Display Module with 8 LEDs 8 Button keys, The chip used in this module is TM1638, which integrates the above three kinds of common peripheral circuits of single chip microcomputer. The biggest feature is that it only needs three IO ports of the single chip microcomputer to drive. Data or key detection, saving MCU resources. Purchase this module to provide sample programs.
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