Flea-Scope™ is a very low-cost (18 USD at Elecrow) and easy-to-use 18 million sample-per-second (Msps) USB oscilloscope and mixed-signal logic analyzer with a built-in waveform generator, and so much more, based on the PIC32MK MCU! Flea-Scope can be controlled by any Chromium-based web browser that supports WebUSB API or Web Serial API running on a computer, tablet, or phone (!!!), with no need for further software install – just plug it in and open a web-page and you are up and running!

My dream is to eventually get this into high-schools to get our kids really building stuff again -- not just assembling prefab components, but really designing and building -- like with transistors, op amps, motor control, etc.

You can even log into Flea-Scope using a different web-page and reprogram it interactively in StickOS BASIC, again using nothing but a web browser, doing live debugging, taking control of all its pins, to use it as a fully re-programmable embedded system core -- see an unbelievable StickOS video in step 6 of detailed build instructions below.

The Flea-Scope User's Guide (including some "how it works" internals and full specifications) is here: https://rtestardi.github.io/usbte/flea-scope.pdf

A preliminary video introduction on youtube is here.

Detailed build instructions are here.

BTW, I just got assembled boards back from pcbway.com and they are beautiful and work on the first try!!! This is my first time doing PCB assembly and panelization -- I cannot believe how easy they made things! They confirmed BOM before I even ordered and identified a part that was not stocked (the MCU is ramping up production now) and we were able to find a suitable alternative (part with a bit more flash for an extra $0.30). Then they confirmed a component value I labeled as 4k when it was actually 4.02k -- they clearly checked and double-checked everything! Finally, they sent me pictures of component placements and confirmed pin 1's and rotations prior to final build. All the careful attention to detail of the pcbway.com team paid off! Thank you pcbway.com!