很强大的芯片，ST的步进电机驱动芯片,SPI口通讯-Very powerful chips, stepper motor driver chip of ST, SPI communication

Connections for stepper motor control via SPI

基于51单片机的NRF24L01无线射频模块收发程序（内含51直流电机驱动代码，无线232通信，串口收发，以及温度传感器数据采集系统程序等等）-Based on 51 single-chip RF transceiver module NRF24L01 program (containing 51 DC motor driver code, 232 wireless communications, serial port transceiver, and a temperature sensor