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Entrusted by the Department of Higher Education of the Ministry of Education and the Department of Personnel and Education of the Ministry of Industry and Information Technology, the National Undergra
A circuit was originally designed to test the size of AC current. The design value is 5A maximum, with multiple ranges. The range switching is performed through the MOS tube IRF540. The Ids of this tu
Note: Dual color temperature dimming is mainly achieved by changing the capacitance of C1 and C2, which results in different delays in VDD power-on time. Multiple capacitors are increased in sequence
Shouldn't the PN532's IRQ pin generate an interrupt when a card is received? I'm using the serial port mode, but why is it that even though I set the IRQ pin to be enabled, it doesn't work? I can read