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Would somebody be kind enough to ELI5 how to calculate the base resistor required on a 2N2222A (used as a switch) when using a 5V Arduino Uno to control a solenoid actuator.
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SOLVED: Texts: Question 2: The 2N2222 transistor is used in the circuit given below. A DC voltage of VCC=16V is applied to the circuit. The resistors R1=39KΩ, R2=4.7KΩ, RC=3.9KΩ, and RE=1.2KΩ are