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Anonymous users2024-01-24First of all, you can use a multimeter to measure whether the level of the IRIN pin has changed when there is an obstacle. Changed the description IR function can be used.
Secondly, there are two kinds of buzzers, one is active and the other is passive, and the driving mode is different. If your buzzer is passive, your buzzer drive way is not ringing. It doesn't have to be high to ring...
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Anonymous users2024-01-23You can send it to me.
I do MCU.
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Anonymous users2024-01-22If both feet of the compass move, you will never be able to draw a circle.
That's not infrared access control, that's an infrared door switch, you need a nest.
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