USB Accessory Oscilloscope

This is an improved version of Jeremy's Oscilloscope.

Features include:

- View, measure, and capture waveform in real time

- Automatically calculate frequency, Vpp, and DC offset

- Frequency from 0.1Hz to 20kHz

- Input voltage from +/-1mV to +/-20V

- ADC resolution: 8 to 10 bits (depending on sampling rate)

- Sampling rate up to 50kHz

- 16 different T/div from 5sec to 50us

- 10 different V/div from 5V to 5mV

- Powered by micro-USB cable

- Providing charging power to the Android phone/tablet