Haasoscope v9.0 open-source 4-channel high-speed USB oscilloscope

Description

Haasoscope is the first open-source, open-hardware, high-speed, USB oscilloscope. As seen on CrowdSupply!
You can use the stock firmware for basic oscilloscope functionality, or modify the firmware to customize what the Haasoscope does (with optional USB blaster). You can add a fancy trigger algorithm, use the FPGA to process the input data, make use of other analog or digital I/O channels, or whatever. And just connect two or more Haasoscopes together if you need more input channels!
See the guide here for more info:
https://docs.google.com/document/d/1euyzCGzQo0u9APwEeior9fpyhcYWbkNxYQaV7SuFfoE/
This is the updated v9.0 board, with wider spacing of the BNC inputs, proper 10x probe compensation, and auto-detection of super-gain switches and 50/1M Ohm termination!
Features and specs:
4 high-speed ADC channels, up to 250 MSPS each (for 2 channels), 8-bit, ~100 MHz max bandwidth, BNC inputs
Intel/Altera MAX10 FPGA with 8k logic elements and 387 kb of memory (enough for 8k samples / channel for each event)
Reprogram firmware over JTAG with free Altera software for Windows or Linux (or Virtualbox on Mac) (cable included in the bundle: https://www.ebay.com/itm/283330921663 )
Python user software for waveform display and control of all features, including FFT, XY plot, measurements, etc.
4 gains per channel: +-3.5 V, +-0.35 V,  +-35 mV, +-3.5 mV ranges, with programmable full-scale DC offset and <1 bit RMS noise
Switchable AC/DC input, 50/1M Ohm termination for each channel
Readout over serial at 1.5 Mb/s, about 20 Hz for four channels of 512 samples each, works with PCs (Win/Linux/Mac), Raspberry Pi, Arduino, etc. - and now even an Android app!
Serial decoding via ripyl python library
Optional high-speed USB2 card for 20x more readout speed: buy here... https://www.ebay.com/itm/282971875030
Optional opto-isolated serial module: buy here... https://www.ebay.com/itm/282971887309
Optional 128 x 64 mini display with SPI interface (included in the bundle: https://www.ebay.com/itm/283330921663 )
22 spare high-speed digital I/O (125+ MHz), including 8-channel digital logic analyzer
4 spare low-speed digital I/O (via I2C bus)
9 additional analog I/O, 1 MSPS (combined) at 12-bit resolution and 0-3.3 V range
4 programmable LEDs and a reset button
USB powered, (or other 5 V input, switchable), ~1 Watt
7.9 x 9.8 cm (about as big as a wallet)