daughterboard

noun

1. 子板，子插件（可插入较大的电路板）
   a small circuit board that attaches to a larger one

1. The demonstration daughterboard contains temperature and light sensors, a three-axis accelerometer, eight tricolour LEDs, and two pushbutton switches.
   演示子板包含温度和光传感器、一个三轴加速计、8个三色LED以及两个按钮开关。