One of the simple yet interesting connection diagrams that young engineers learn in their lab is the staircase lighting setup.

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本帖最后由 ltbytyn 于 2014-11-17 23:18 编辑 硬件部分:MSP430FR5969 Launchpad+430BOOST-SHARP96+ADXL345 ADXL345数字三轴重力加速度芯片，支持I2C\\SPI两种接口，本设计中采用I2C接口。 M ...

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上拉（Pull Up ）或下拉（Pull Down）电阻（两者统称为“拉电阻”）最基本的作用是：将状态不确定的信号线通过一个电阻将其箝位至高电平（上拉）或低电平（下拉），无论它的具体用法如何，这个基本的作用都是相同的，只是在不同应用场合中会对电阻的阻值 ...