MINI handheld oscilloscope is reproduced based on Lao Liu's oscilloscope solution.

Main control: STC8A8K64S4A12

Boost: B628

Screen: SPI 0.96-inch OLED SSD01306

https://www.bilibili.com/video/BV1ai4y1t79R?spm_id_from=333.337.search-card.all.click

Forehead! I applied too much force when installing the screen, and the lower left corner of the screen broke. It’s not a big problem, it’s not a big problem. It does not affect the use of.

The machine is divided into three parts. One is the main control board and battery part, the other is the encoder control and boost part, and the other is the 0.96-inch OLED screen module with SPI communication protocol.

The COM end and IN+ end of the main control board are signal input interfaces.

Placing the main control board capacitors in this way will save space.

When charging the machine, just connect the charging power terminal to the IN+ and IN- terminals of the main control board.

The connection between the main control board and the boost control board adopts the pin and female connection method.

Program burning probe.

The battery uses rechargeable lithium batteries. I use lithium iron phosphate batteries. (The key is that I am too poor and do not have a lithium battery of suitable size on hand. ~￣▽￣~)

※The output voltage of the booster board must be adjusted to below 5.5V! ! ! Otherwise, there is a risk of burning the main control.

Source code and details are on GitHub: https://github.com/CreativeLau/Mini-DSO

It is downloaded in the project attachment.