“uProbe is a simple logic/oscilloscopic probe in a highlighter case.
In this article I want to tell you about my DIY logical probe - uProbe.
It is simple enough because it is based on a microcontroller.
As you can see from the photo, this probe is assembled in the case of highlighter pen, so it is very compact. It does not require an external power source, because it is powered from a Li-ion battery.
This probe is controlled by two buttons.
Charging the battery and updating firmware are done using a special connector, hidden under a highlighter cap.”