In accordance with the general of science and technology development board schematic diagram to connect buzzer, ULN2003 driven, buzzer normal ring on the development board, make your own board buzzer rang, the multimeter measuring circuit is ah, why don't buzzer rang? With passive buzzer,

CodePudding user response:

MCU virtual welding is about?

CodePudding user response:

Development board is active buzzer?
Your plate on the passive buzzer verification before?

CodePudding user response:

Development board is passive, I asked for customer service, development board should not virtual welding, with universal plate test circuit is connected the

CodePudding user response:

There is a frequency signal drive, a need not

You the buzzer directly to receive 3 v to 5 v power supply on the ring does not ring (don't pick up), if not ring that was probably want to use frequency signal drive, you use 2 ~ 3 k pulse signal driver see

If your program is the same, do you consider your own bat stuck up