Haasoscope

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Jun 16, 2017

RPi Zero W and a Screen

The next board prototype should be shipping to me any day now. In addition to a better ADC chip, it won’t need all the colorful wires, and will snap to other Haasoscopes using a connector on the side. In the meantime, I’ve continued to play with the current version. Today I managed to read out (and power!) the boards using just a Raspberry Pi Zero W ($20) with the serial port:

I’ve been connecting to the Pi over Wi-Fi using VNC, and it can draw the oscilloscope plot at about 5 Hz (I put some effort into speeding up the python plotting code!). You could also just record the data using the Pi (much faster!), and even process the data in python before writing it out, etc.

You may also notice I’ve added a screen! It’s a 1”, 128 x 64 pixel OLED, driven straight from the FPGA. It probably won’t ship by default with the board, but you’ll be able to snap one on as a nice add-on. At the moment it shows the data (+/-64 samples around the trigger) from one of the channels, and at startup has a pic of my baby drinking a bottle (see below) - retro cool, eh?

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Product Choices

$119

Your very own Haasoscope!

A fully assembled Haasoscope, preloaded with firmware and ready for data-taking! You also might want to grab a USB-serial adapter (for interfacing to a computer) and/or a USB-blaster (for reprogramming the firmware).


$9

USB-blaster

This lets you reprogram the Haasoscope FPGA firmware from either Windows or Linux using the free Altera Quartus II software via the JTAG connector.


$9

A Cool Screen!

This is a 0.96" 128X64 pixel white OLED screen. It communicates with the Haasoscope over an SPI interface, and can show ADC data from a selected channel, or whatever you tell it to! It can plug directly into the header above the FPGA.


$16

Oscilloscope Probes

Two passive 100 MHz bandwidth oscilloscope probes for connecting to Haasoscope 100 MHz ADC inputs using BNC.


$15

High-speed USB Readout Board

In case 1.5 Mb/s is not enough bandwidth for you, grab one of these boards and have high-speed USB2 output from a Haasoscope! Using just 8+2 digital outputs on the Haasoscope, you can get about 4 MB/s, about 20x faster than serial, and still use the same python readout code. It's supported in the stock firmware too! Using 8+4 digital outputs, you could in theory even get up to 40 MB/s using C++ readout code and the free FTDI USB libraries.


$35

A Haasoscope Mug!

Drink your coffee in style and support the Haasoscope dream.

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Credits

Andy Haas

I teach physics at NYU. I use electronics for research, in teaching, and as a hobby.


Andrew Haas


Seeed Studio

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