Nev
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Joined: Fri Jan 16, 2015 7:09 pm

usb oscilloscope

Wed Jul 29, 2015 6:59 pm

Wondered if anybody has experience of using a usb oscilloscope such as the Hantech device available on ebay. I really only want it for debugging some of my projects with pi and don't want to spend a lot on a full blown stand alone all singing/dancing model.
Thanks

Heater
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Re: usb oscilloscope

Wed Jul 29, 2015 7:40 pm

Do you mean Hantek ?

Perhaps like this http://www.ebay.com/itm/Hantek-6022BE-P ... 1265189899

Perhaps good for low frequency poking around and educational purposes.

What puts me off is being tied to a PC to do so. I'd rather have the cheapest Rigol I can find, like so "http://www.ebay.com/itm/Rigol-DS1052E-D ... 1c371cbeaf"

Of course I realize that may be more than you want to spend.
Memory in C++ is a leaky abstraction .

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B.Goode
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Re: usb oscilloscope

Wed Jul 29, 2015 8:44 pm

How about this: http://www.picaxe.com/Hardware/Add-on-M ... PCB-scope/

Of course the specs are nothing to write home about. The supporting software is Windows-only.

I've found it perfectly OK for watching - and measuring - PWM pulses on an RPi. It also has a logic analyser (digital signal levels) mode.

Some simple soldering required to add the headers to the board.

The price makes it a good match for an RPi.

Alternatively, if you only need to watch digital signals on the RPi header, a logic analyser might be all you need. You can find usb-connected, windows-software supported logic analyser dongles for a similar price. For example: http://hobbycomponents.com/test/243-hob ... c-analyser This takes 'snapshots', it doesn't run in real time.

No illusions: these are not workshop or lab quality measuring instruments. But they allow me to see and understand events that are not visible with an 'analogue' multimeter.

I own both. I have no connection with either company mentioned.

racpi
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Re: usb oscilloscope

Wed Jul 29, 2015 10:37 pm

if its mainly digital signals you are looking at then a saleae logic data analyser is hard to go past . there are cheap clones of the logic8 around but they have issues (crosstalk between channels is woeful) .the genuine product is best and similar in price to the hantek usb scope

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FTrevorGowen
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Re: usb oscilloscope

Thu Jul 30, 2015 1:27 pm

FWIW, @joan's piscope** software can enable a Pi to monitor it's GPIO's (which may be external digital signals of course):
http://abyz.co.uk/rpi/pigpio/piscope.html
(I've found it a very useful diagnostic tool since I no longer have access to 'scopes etc.)
Trev.
Still running Raspbian Jessie or Stretch on some older Pi's (an A, B1, 2xB2, B+, P2B, 3xP0, P0W, 2xP3A+, P3B+, P3B, B+, and a A+) but Buster on the P4B's. See: https://www.cpmspectrepi.uk/raspberry_pi/raspiidx.htm

plugwash
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Re: usb oscilloscope

Thu Jul 30, 2015 4:58 pm

My rule of thumb for using a scope for digital work is that you want the analog bandwidth of your scope to be at least 5 times the highest working frequency. So a 20MHz scope would be fine for debugging BBC micros but of very limited utility for any modern digital work. Without knowing what circuits you are trying to debug it's difficult to give useful advice.

Logic analysers can be useful but they won't tell you anything about the quality of the signal, OTOH they are much cheaper than scopes for a given working frequency.

henryhanselscott
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Re: usb oscilloscope

Thu Jul 30, 2015 5:40 pm

Knowing that the OP was asking about USB scopes...but....I considered going that route for a while and after much reading the jury was still out if they would meet my requirements or not. So, I decided to go with the popular Rigol DS1102E bench scope. I now have 2 of them, one for work and one for home. They are fantastic little scopes.

Henry

Nev
Posts: 34
Joined: Fri Jan 16, 2015 7:09 pm

Re: usb oscilloscope

Thu Jul 30, 2015 6:46 pm

Thanks to everyone for their very helpful posts.
I'm going to look at the pcbscope initially because of it's price mark and simplicity. I'm sure it will have limitations but I can upgrade later without having wasted too much money.
I'll let you know how I get on

Nev

JohanP
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Re: usb oscilloscope

Tue Mar 14, 2017 3:08 pm

I'm using Hantek 6022be and i'ts very good i use him for hobby :D if you like this is good choose for you i think Hantek is Best USB oscilloscope and on the link you can find more about that
http://fanyit.com/review/hantek-best-us ... pe-review/ also you have and more professionals and good but price is very big :D

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