Use of stm32f103 development board to meet the lcd1602, after burning process under the condition, how to return a responsibility
(5 v power supply of 51 board, pins after the contrast, the power of the back plate of 3.3 v)

CodePudding user response:

1602 contrast pin grounding is the picture show, the building Lord rheostat points down, then received a contrast on the pins, I must be more than 4 v, impression