STM32_OLED_NANO---0.91 inch OLED pendant

Recently, I have built several low-power L0 series chips. This project is mainly used to experience the L0 series and low-power performance. The PCB design and layout are not very mature (especially the ugly PCB appearance). It will be gradually Improved and launched 0.96 and 1.3-inch versions because I personally like the display effect of the OLED screen.

1.Circuit scheme

• Main control STM32L010F4P6 (2KB RAM, 16KB FLASH)
• Type-c + CH340N ISP download, DIP switch selects boot0 startup mode
• 0.91-inch OLED and its driving circuit
• MCP73831T+LP5907MFX-3.3 lithium battery power supply circuit, connected to an external 100mAh lithium battery, can realize real-time switching between lithium battery and external power supply

2.Description

• Battery life: not tested
• There is no shell, tentatively designated as the exploration version.
• cubeide+hal library development, the program will be uploaded after it is perfected
• There is no switch on the whole board. Once the battery is welded in, it will consume electricity all the time. It needs to be improved.
• Because I am not very familiar with the L0 series, the user buttons were not connected to the wake-up pins (PA0, PA2) of the l0f4p6 series during the design time, which needs improvement.
• Since the overall performance and resources of the STM32 low-end series are extremely weak, just adding a bmp bitmap and font header file squeezes flash and ram to this point:

3. Physical picture