What is the reason of using 10K10 kΩ resistor in series to the control signal? isIs it related to the base current according to the NPN transistor's datasheet?
For example: my CONTROL/GPIO is 5V the maximum base current according to the NPN transistor's datasheet is 120mA Does
- My CONTROL/GPIO is 5 V.
- The maximum base current according to the NPN transistor's datasheet is 120 mA.
Does it meansmean I need to have minimum 42R42 Ω resistor?
Thanks, Roy