2pcs USB Logic Analyzer Device with USB Cable 24MHz 8CH 24MHz 8 Channel UART IIC SPI Debug for Arduino ARM FPGA M100 SCM

These are great for the hobbyist, and even more convenient that they came in a two-pack!The main nit I have against them is not necessarily the analyzer, it's the open-source software package Pulseview. It's buggy and missing a number of basic features, but the price is right and it's helped me out a lot.

The sigrok software with this logic analyzer works well. Cant beat for under $20.

Channels are driven high at 3.3V, making this useless for bus debugging.

These analyzers work as expected with slower protocols like standard-mode I2C but crashed after several seconds of operation monitoring faster protocols at 1-2 MHz. Saleae software is necessary to get the proper drivers on your computer, at that point they work with various programs I used.Do not buy these if you are expecting performance anywhere close to the advertised 24 MHz, but they are a workable budget solution if you don't need those speeds.

These devices allow you to see the waveforms of digital signals in a circuit. The only thing is they do not come with any software and documentation. There is a pin marked CLK which seems to have a triangle waveform, not sure what that is for. Never the less I found the software which is free and open source for them and it works well enough but be prepared to fiddle with the software to make it work.

I like the product but it needs documentation or a link to documentation

Title says it all. Using Logic or PulseView doesn't matter - anything over 6mhz, even if only sampling one channel - overloads and fails.