Anything I can buy for $50?
Flea-Scope: $18 Source Available USB Oscilloscope, Logic Analyzer and More [pdf]
51–60 of 112 posts
Re: Flea-Scope: $18 Source Available USB Oscilloscope, Logic Analyzer and More [pdf]
#52I think projects like that would have been a godsend 2-3 decades ago, when even a basic oscilloscope costed as much as a used car. Nowadays, very good oscilloscopes with 200 MHz bandwidth, good user interfaces, and responsive displays are selling for $300 - I'm talking Siglent, Rigol, UNI-T. So the merits of DIYing something much worse just aren't quite there. It's that one piece of equipment you use to troubleshoot…
You can put, for the same price, almost 20 fleascope in a classroom instead of one profeasional one.
I think it does have its place even today.
Re: Flea-Scope: $18 Source Available USB Oscilloscope, Logic Analyzer and More [pdf]
#53I think projects like that would have been a godsend 2-3 decades ago, when even a basic oscilloscope costed as much as a used car. Nowadays, very good oscilloscopes with 200 MHz bandwidth, good user interfaces, and responsive displays are selling for $300 - I'm talking Siglent, Rigol, UNI-T. So the merits of DIYing something much worse just aren't quite there. It's that one piece of equipment you use to troubleshoot…
> very good oscilloscopes with 200 MHz bandwidth, good user interfaces, and responsive displays are selling for $300 This is a very strong first world POV. Those U$D 300 rank pretty high across world's minimum salaries [1], not to mention that prices can very likely double in countries like my own. Moreover, a large % of people that can really get a very good use of this (Kids in high school) usually have a lot less…
I get what you’re saying, but there are also fully functioning oscilloscopes for far less.
For the purposes you are talking about you can get what you need with one of the $20-40 scopes.
Those ones also tend to be portable and more rugged which is what you need if you don’t have a full blown lab to keep a nice oscilloscope in.
Re: Flea-Scope: $18 Source Available USB Oscilloscope, Logic Analyzer and More [pdf]
#54Re: Flea-Scope: $18 Source Available USB Oscilloscope, Logic Analyzer and More [pdf]
#55Earlier quoted context omitted.
> very good oscilloscopes with 200 MHz bandwidth, good user interfaces, and responsive displays are selling for $300 This is a very strong first world POV. Those U$D 300 rank pretty high across world's minimum salaries [1], not to mention that prices can very likely double in countries like my own. Moreover, a large % of people that can really get a very good use of this (Kids in high school) usually have a lot less…
I get what you’re saying, but there are also fully functioning oscilloscopes for far less. For the purposes you are talking about you can get what you need with one of the $20-40 scopes. Those ones also tend to be portable and more rugged which is what you need if you don’t have a full blown lab to keep a nice oscilloscope in.
Note: the intention of this comment is just to be informative.
I did a quick search in my country's Mercado Libre (the local Amazon, we could say) and the cheapest available one, Fnirsi-138 Pro [1] goes for a price of aprox. 50 USD [2]
[1] https://www.amazon.com/Digital-Oscilloscope-Portable-Samplin...
https://www.mercadolibre.com.ar/osciloscopio-digital-fnirsi-...
Re: Flea-Scope: $18 Source Available USB Oscilloscope, Logic Analyzer and More [pdf]
#56Does the software provide a way to export recorded waveforms to allow analysis in other programs? And what is the maximum number of samples it can record?
What’s the use case you’re trying to solve for here?
Re: Flea-Scope: $18 Source Available USB Oscilloscope, Logic Analyzer and More [pdf]
#57I think projects like that would have been a godsend 2-3 decades ago, when even a basic oscilloscope costed as much as a used car. Nowadays, very good oscilloscopes with 200 MHz bandwidth, good user interfaces, and responsive displays are selling for $300 - I'm talking Siglent, Rigol, UNI-T. So the merits of DIYing something much worse just aren't quite there. It's that one piece of equipment you use to troubleshoot…
The new Rigol DHO800 series are fabulous bargains for the money, and extremely well designed in a lot of ways: - 12 bit ADC frontends - Actually usable touchscreen inputs - Super simple to drive remotely over a network connection (though getting the IP address with just the touchscreen is a little tricky) - USB-C power input - you can run it from a battery pack if you like! - All the essential decoders built in for f…
These start from 450 euros.
Re: Flea-Scope: $18 Source Available USB Oscilloscope, Logic Analyzer and More [pdf]
#58The flea-scope's hybrid FPGA/MCU architecture for USB streaming is clever - using FPGA pipelining to handle 100MS/s capture paired with an STM32 for protocol translation is sweet cost-wise. BUT, the 8-bit ADC resolution and lack of input protection networks (compared to Rigol's 1MΩ//20pF frontends with overvoltage clamping) make it risky in case of unattenuated signals. The Python analysis toolkit using NumPy/SciPy f…
I'm wondering if we looked at the same document... there is no FPGA and it is PIC32MK0512GPK064 instead of STM32. It's also 12 bits at nowhere near 100 Msps, being only 18 Msps.
Did you use the aid from AI to write the comment, or are you referring to another device?
Re: Flea-Scope: $18 Source Available USB Oscilloscope, Logic Analyzer and More [pdf]
#59I've always been fascinated by oscilloscopes, but I don't dabble in electronics. Is there any use of it for normal homeowner?
Re: Flea-Scope: $18 Source Available USB Oscilloscope, Logic Analyzer and More [pdf]
#60Earlier quoted context omitted.
> very good oscilloscopes with 200 MHz bandwidth, good user interfaces, and responsive displays are selling for $300 This is a very strong first world POV. Those U$D 300 rank pretty high across world's minimum salaries [1], not to mention that prices can very likely double in countries like my own. Moreover, a large % of people that can really get a very good use of this (Kids in high school) usually have a lot less…
I get what you’re saying, but there are also fully functioning oscilloscopes for far less. For the purposes you are talking about you can get what you need with one of the $20-40 scopes. Those ones also tend to be portable and more rugged which is what you need if you don’t have a full blown lab to keep a nice oscilloscope in.
what makes the Flea-Scope so particularly interesting to me is that you get I think 9 channels worth of digital inputs all at once. That is hard to beat for the price.
Regarding raw specs, it seems to be much better in most regards compared to the mentioned Fnirsi-138 Pro.