A long time ago I ordered (eBay) and recieved a very cheap logic analyzer (it came out to be a Saleae clone). I havent really played with it enough, but I decided to test it.
It connects to PC via mini(!)-USB cable, and has 8 (+2 gnd) pins on the opposite end. The label marks it as a 24MHz 8 channel analyzer. I’ve connected it to a USB->RS232 adapter (from an old mini/nano Arduino kit).
I expected it needed some weird Chinese software, but it worked with original software from Saleae (which is nice).
Capturing data is also very easy – the only two options are sample rate and data capture duration.
After the capture timer is over, the program shows logical levels on a time graph (first screenshot) – it does not seem to autodetect the protocol used. After selecting the protocol and protocol options (mainly the correct pin/s) it also decodes the actual data (“test123” in this case).
As it can be seen on the first screenshot, it correctly decoded the data sent via the RS232 adapter.
For $10, it’s a great toy. It probably has some timing/sync issues, and the casing isn’t that great, but for that little money, who cares!