Haasoscope

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Aug 24, 2017

Third Prototype

The third prototype came in last week. It’s really starting to come together! Everything works nicely - and you can even plug Haasoscopes together (to make an N-channel scope!), with no extra wires. Check out these two Haasoscopes:

The board behind the two Haasoscopes is an EspoTek Labrador, which is great for testing while traveling.

Unfortunately, I royally messed up the analog front-end in this version - hence the extra wires on the board in the picture above. (Lesson learned: ADCs have a fairly small input impedance!) I’ve now redesigned the front-end, adding an op-amp (370 MHz bandwidth!) to allow for gain changes and level shifting, just like a real scope. In the next version (being made now), you’ll be able to select from two gains (+/- 5 V range and +/- 500 mV range) and adjust the DC offset independently for each channel, via software/firmware. That is, assuming it works this time. :)

Oh, and you’ll also be able to get your very own Haasoscope coffee mug!

Cheers,
Andy

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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.

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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

PCBA Manufacturer

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