This project showcases a compact simple oscilloscope that was built around the Teensy 4.0 micro controller. The device supports dual-channel input with high fidelity thanks to the 12-bit onboard ADC on the Teensy 4.0. The user interface offers two rotary encoders and switches to provide adjustable voltage and time-base scaling along with trigger functionality. The user will see the wave-forms rendered on a 320x240 ILI9341 TFT display