Several high-performance lab instruments suitable for manual assembly havebeen developed using low-pin-count 32-bit microcontrollers that communicatewith an Android tablet via a USB interface. A single Android tablet appaccommodates multiple interface needs by uploading parameter lists andgraphical data from the microcontrollers, which are themselves programmed witheasily-modified C code. The hardware design of the instruments emphasizes lowchip counts and is highly modular, relying on small "daughter boards" forspecial functions such as USB power management, waveform generation, andphase-sensitive signal detection. In one example, a daughter board provides acomplete waveform generator and direct digital synthesizer that fits on a 1.5"X 0.8" circuit card.
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机译：使用低引脚数的32位微控制器开发了几种适用于手动组装的高性能实验室仪器，这些微控制器通过USB接口与Android平板电脑进行通信。单个Android平板电脑应用程序通过从微控制器上载参数列表和图形数据来满足多种接口需求，而这些参数列表和图形数据本身都使用易于修改的C代码进行编程。仪器的硬件设计强调低芯片数，并且高度模块化，依靠小型“子板”来实现特殊功能，例如USB电源管理，波形生成和对相位敏感的信号检测。在一个示例中，子板提供了完整的波形发生器和直接数字合成器，可安装在1.5“ X 0.8”电路卡上。
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