stm32schematicbluepillcircuithardware-designsstm32f103lcd1602max30100sx1509pcf8574ausb2077a UpdatedAug 30, 2021 Several circuit examples supporting the following HITACHI HD44780 modules: 1) LCD1602A, v3, 2) LCD1602A, v3, with the PCF8574A chip providing I2C input and 3) LCD2004A, v1.3, with ...