The is a popular 2-in-1 device that combines a digital oscilloscope with a transistor tester. Its firmware journey is a story of community ingenuity and the "hacker" spirit that often surrounds these affordable bench tools. The Legend of the "Two-Part" Firmware
(originally for Geiger counters) and STM32-based component testers on GitHub occasionally offer expanded capabilities for FNIRSI hardware, though official firmware is recommended for stability. How to Update Your DSO-TC2 Firmware The DSO-TC2 uses a USB analog U-disk fnirsi dsotc2 firmware