To anyone who tinkers with digital electronics and micro-computers, a logic analyzer is a great tool to have. Unfortunately they used to be quite expensive. Nowadays ... no more. This tiny, 8 channel, 24MHz sample rate, USB module can be had for as little as €4,-. Combined with the free open source 'sigrok / pulseview' software it makes for a very capable and fun to use logic analyzer that anyone can afford.
I tried one and I can only say "wow ... what fun'. Old times revived. I remember form my studies and my first job around 1980 that we had large table top equipment from Hewlett Packard, Philips, Tektronics that cost thousands and had fist thick user manuals on how to use them. Now similar things can be done with a module the size of a match box.
More info and a video on how to connect the module and about the software features can be found here: link to the video.