The Internet of Things era is making hardware projects more accessible than ever to hobby and beginner users. As many of them work on their projects from home, there is a growing need for accessible tools, or even tools that they can build themselves for later user in other hardware projects. The main purpose of this paper is to present an open source solution for a portable oscilloscope, customized to meet the hobby working requirements. The small oscilloscope is very easy to use and communicates via USB port for processing, logging and display. This oscilloscope is very useful for any electronics applications, being a very handy tool for students and hobbyists. The 2MSPS sampling speed and 8-bit resolution are considered to be enough for general-purpose hobby applications.