[jboy55]

So starting with nothing at all, what is the total cost of ownership for the flea -cope? My guess, its over $300, (if $300 is your annual salary, your existing phone will probably not cut it). And for comparison, standalone toy oscilloscopes (<10Mhz bandwidth) go for $30 and under (some $11), with screen, on AliExpress. And a "decent" one, like OWON, is around $150.

The problem is, with a toy scope, you aren't really gonna know if what you're measuring is real. This might be useful as a kit to build to learn how to program microcontrollers, or measure audio signals (the $11 one, or the mic on your phone can do this), but a bad scope will generally cause more problems for the hobbyist. When you get near the limit of a scope's bandwidth, the signals get really messy and full of artifacts. Arduinos run at 8-16Mhz, so you're gonna hit a wall really quickly and once you can't rely on the output, the investment will be lost.

[burgerone]

Where's that guess coming from? The scope is $18, the optional probe from elecrow is $5 extra. You most definitely have either an android phone or a laptop/PC with a browser from the last ten years already. As such the cost is pretty minimal. Say you bought a set of these kind of test probes with hooks at the front. A set would maybe cost you $10. Now you can use all your 9 channels. I don't understand your price calculations.

Every scope out there has an upper limit in terms of speed. If you have no use for it, don't buy it. This oscilloscope is first and foremost a learning resource.

[jboy55]

"This is a very strong first world POV. Those U$D 300 rank pretty high across world's minimum salaries "

My point, since I was replying to a poster who said the above, was if you are making $300 a year, you don't have a laptop. So, if you read my assumption, that you don't have a laptop, android phone or laptop, and you are making < $1000 USD a year, the Flea-Scope will cost more than a decent one with a built in display and much more than a ~2mhz toy intro oscilloscope ($11 on Aliexpress) [1]

I could also very well reply with just the quote above.

https://www.aliexpress.us/w/wholesale-oscilloscope-.html?spm...