As shown in the figure, what role does this circuit play? Why not directly connect the input to the output?
Fernando ポストする November 20, 2020
Voltage divider circuit.
Annika ポストする November 20, 2020
The voltage divider circuit, the resistance increases the power consumption is very limited.
Ryley ポストする November 20, 2020
4.7K is used as a pull-down resistor.
Rolando ポストする November 20, 2020
The first 4.7K is pull-down, the latter two are partial pressure, and there is a certain current limit.
