Bruce Shapiro got me to design and build the UBW (USB Bit Whacker) project to solve his problem of disappearing parallel ports on computers.
BruceShapiro找我来搞了个UBW项目(使用usb接口的驱动板)，以解决他电脑上没有并行接口的问题。
Systematic architecture, circuit design, and principles of the parallel ports trans-forming circuit capable of driving multiple peripherals are discussed.
从系统结构、电路设计、工作原理几个方面讨论了能够驱动多个外设的并口转换电路的实现。
To control stepping motors, the balance bridge power drive circuit is made up by TDA1521 integrated audio power amplifier, the pulse allotter is made up by the parallel ports of computer and latches.
双回转机构的步进电机控制电路由TDA1521音频集成功率放大器组成平衡桥式功率驱动电路，由计算机并行口经过锁存器构成脉冲分配器。
To control stepping motors, the balance bridge power drive circuit is made up by TDA1521 integrated audio power amplifier, the pulse allotter is made up by the parallel ports of computer and latches.
双回转机构的步进电机控制电路由TDA1521音频集成功率放大器组成平衡桥式功率驱动电路，由计算机并行口经过锁存器构成脉冲分配器。
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