The detection circuit diagram is posted here. The DC voltage value is 500V. R20, R26, R27, R28 and Rx form a sampling resistor between DC+, GND and DC-. The purpose is to collect the voltage across R2
Is the level of boot seclect GPIO 18, 34, 29 set by setting it as input and connecting an external 3.3V voltage, or setting it as output and making corresponding settings
〓LCD panel〓 LCD panel has a very close relationship with LCD monitors. The output, quality and other factors of LCD panel are related to the quality, price and market trend of LCD monitors. Among the
In industrial control, 485 is a bus that is widely used. However, in actual construction, some environments have a great interference with the 485 bus. What equipment or how to detect whether the 485