00:005V
00:01能不能直接接触到 LED lights
00:04No
00:05the on voltage drop of the led lamp bead is two three volts and limited current
00:10so to connect a voltage dividing limit viewership of resistors but how big
00:15you have to calculate if the voltage drop of this lamp bead is two volts so
00:20the voltage divider resistor is three volts single allowable current is 20 milli
00:25ampers string resistance is 150 ohms
00:30you
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