看看老外是怎样设计的吧！
原理图+PCB倾情大放送！！！
We built a multifunction scope based on Luminary Micro’s LM3S811 Evaluation board. This small handheld tool can be operated either standalone with 3 AAA batteries or powered by a PC’s USB port. When it runs in conjunction with a PC, the oscilloscope’s traces and measurement readouts can also be displayed on the PC screen though the USB cable. The multifunction tool supports the following modes:
- Dual ChannelTrace Oscilloscope: The oscilloscope supports 250K sampling/s for each channel. It provides free running (auto) mode, edge-triggered mode from channel 1 (+/- edge), and single shot mode.
- AC/DC Voltmeter: Auto ranged from mV to 10V.
- Ohmmeter: Auto ranged from 0W to 1.36 MW, with audible sound for connectivity.
- Capacitor Meter: Auto ranged from pF to 100 uF.
- Inductor Meter: Measures inductors in the mH/H range.
- Frequency Counter: Counts small level signal frequency.
- Logic Probe: Senses Logic High, Logic Low, Open Circuit (tri-state) and Pulse.
- Pulse Generator: Pulse repeat frequency: 5 Hz to 5MHz. Duty cycle: 1% -99%. Support single pulse output.
原理图：
PCB 、元件安装图：
效果图：
有兴趣的朋友也可以自己DIY一个呀！
