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FScope 250k5 Raspberry Pi Pico Oscilloscope

Overview

开源项目搬运

Scoppy示波器的模拟前端，具有4个电压范围、2个通道和AC/DC耦合。 Scoppy允许您将Raspberry Pi Pico和Android设备用作示波器来测量低压和低频信号。
https://github.com/fhdm-dev/scoppy
测量不同的电压范围
要测量与默认 (0-3.3V) 不同的电压范围（例如 -5V 到 +5V 或 0V 到 0.1V 等），您需要在 Pico 前面添加额外的电路来衰减/放大信号和/或提供适当的电压偏移，使 Pico ADC 引脚的电压介于 0 和 VREF 之间（默认 VREF 为 3.3V）。
如果您决定添加模拟前端，则需要配置 Scoppy 应用程序以显示正确的电压。您可以通过点击屏幕底部的通道标志，点击设置，然后点击Voltage Range来执行此操作。每个通道最多可以输入 4 个Voltage Range。您的前端通过通道 1 的 GPIO 2 和 3 以及通道 2 的 GPIO 4 和 5 指示当前选择的Voltage Range。这些引脚的逻辑电平和相应的Voltage Range ID 显示在下表中。默认情况下，这些引脚被拉低至低电平，因此如果您什么都不做，则选择Voltage Range 0。
GPIO 2
GPIO 3
Ch 1 Voltage Range
LOW
LOW
0
LOW
HIGH
1
HIGH
LOW
2
HIGH
HIGH
3
GPIO 4
GPIO 5
Ch 2 Voltage Range
LOW
LOW
0
LOW
HIGH
1
HIGH
LOW
2
HIGH
HIGH
3

Design Files

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Update:2025-05-24 17:34:50

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