Mini-DSO - a low-cost simple oscilloscope

A simple oscilloscope made of STC8A8K MCU. The microcontroller uses STC8A8K64S4A12 working at 27MHz. The display uses a 0.96 OLED with a resolution of 128x64. This oscilloscope project is easy to start and covers the necessary measurement functions. Supports normal mode, single mode, and automatic mode. It has trigger mode selection, such as level trigger, and comes with saved settings. Mini-DSO input is single-channel mode, and the second/division size can support a variety of: 500ms, 200ms, 100ms, 50ms, 20ms, 10ms, 5ms, 2ms, 1ms, 500us, 200us, 100us, and the voltage acquisition range is 0 to 30V. The sampling rate can reach 250kHz@100us/div. The following is the component list of Mini-DSO:

TC8A8K64S4A12 MCU x 1
SSD1306 OLED (SPI) x 1
Resistor:
1W 10k x 1
1/4W 2k x 2
1/4W 10k x 1
1/4W 5k x 1
Capacitor:
47uF x 1
0.01uF x 1
LED x 1
EC11 Encoder x 1
toggle switch x 1
2-pin terminal block x 1
socket strip:
7-pin x 1
2-pin x 1
3.7V Li-ion battery
5V booster module with charge management
USB-TTL downloader