Gallium Arsenide Diode Infrared Source Optically Coupled to a Silicon npn Phototransistor
High Direct-Current Transfer Ratio
Base Lead Provided for Conventional Transistor Biasing
High-Voltage Electrical Isolation . . . 1.5-kV, or

Nios II VGA Controller with DMA The Nios II VGA Controller with DMA is an SOPC Builder component which can be added to any SOPC Builder system to provide VGA display capability. The controller is capable of displaying the following resolutions

430 IAR Embedded Workbench for Texas Instruments 430 5.60 8051 IAR Embedded Workbench for 8051 8.30 ARM IAR Embedded Workbench for ARM 6.70 AVR IAR Embedded Workbench for Atmel AVR 6.30 STM8 IAR Embedded Workbench for STMicroelectronics STM8

随着科技的发展，运用超声波作出精确测量已经成为可能，由于超声波测距是一种非接触检测技术，可以运用各种环境中，较其他仪器更加卫生，更耐潮湿、粉尘、高温、腐蚀气体等恶劣环境。该智能超声波测距系统分为超声波测距部分，显示部分，主控部分，语音芯片（1）超声波测距主要用超声波模块，传回来的数据给单片机处理。（2）显示部分由lcd显示（3）主控部分主要由51单片机及其外围电路组成。（4）语音芯片主要单片机控制芯片发声。本系统设计完毕后能够实现以下功能。1）lcd即时显示当前距离值。2）距离值可以精确到厘米。