lec 6.2

Question 1

when any digital I/O pin is configured as an output, what can the voltage be set too and what is the max current

Answer 1

set to either 0V or +5V with

a maximum supply current of around 40mA

Question 2

what formats are relays available in

Answer 2

both mechanical or solid state formats

Question 3

process of operation on mechanical relay

Answer 3

voltage applied to a digital pin causes a current to flow in relay coil, which the coil produces magnetic field

Question 4

process of operation on mechanical relay solid state

Answer 4

semiconductor device that uses the current flowing from one of the
digital pins to illuminate an LED.
emitted light falls on a phototransistor, thereby allowing a
much larger current to flow through it

Question 5

what is the most appropriate transistor

Answer 5

MOSFET

Question 6

what is MOSFET

Answer 6

transistor that is like a digital switch

Question 7

main job of a MOSFET

Answer 7

helps protect the device from reverse voltage situations