MSP430 chip, Port 4.5 is a button. Press the button to flip the LED light P1.1. My approach is as follows, but the button is always pressed but the LED does not flip. What method is good for button fi
Design and select LC filter circuit for Class D power amplifier chip output. Now we know that the bandwidth of audio analog signal is 100Hz-16kHz, and the minimum load of load speaker is 2 ohms (now c
[i=s]This post was last edited by littleshrimp on 2020-12-1 11:28[/i]Air pressure data: the air pressure gradually dropped after the plane took off, and gradually rose during landing. I didn't feel an
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[i=s]This post was last edited by qwqwqw2088 on 2017-7-20 21:56[/i] In the past forty years, a large number of literatures have reported the presence of manganese in the positive and negative electrod