Easy to learn and use, suitable for novice friends. You can freely choose the familiar 51 microcontroller (40P). The chip resistor is 1.5k 0805. 30 LED lamp beads (5mm). 30 self-locking buttons. 1 terminal block. 1 pin header. 1 4P Crystal oscillator 11.0592 1 capacitor 30PF (direct plug-in) 2 related codes have been packaged. Due to time constraints, only part of the debugging has been completed!
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