short answer for shift reg and motors

what is the main function of the 74HC595 shift register

converts serial input data into 8 parallel output allowing multiple outputs to be controlled used fewer micro controller pins

how many output pins does the 74HC595 shift register provide

8 parallel output pins

which pins are connected to the shift register

latchpin, clockpin and data pin

what does the latch pin do

stores the shift data and updates the output when set to low

what is the purpose of the shiftout

to shift data bits serially into the shift regsiter

what parameter in shiftout determines the order of data transmission

third parameter in the shiftout function to determine the order of data transmission

difference between LSBFIRST and MSBFIRST

LSB is shifted out first MSB is shiftout first

what is photocell

light dependent resister and a resistor whose resistance decreases as the intensity of light increase

which function reads photocell value

analog read

what is the range of values for analogRead

0 to 1023

advantages of a shift register

pin conservation and simplified wiring

what is a DC motor

converts electrical energy into mechanical enegery using magnetic fields

why cant an arduino dircetly power a DC motor

DC motors draw more current than an Arduino can supply

what role does a motor driver play in controlling a DC motos as Arduino

controls the motors speed by acting as an interface between the arduino and the motor

what is an H-bridge circuit used for

allows DC motor to be driven in both direction

what is a stepper motor

converts electrical pulses into discrete mechanical movements

what is the holding torque in a stepper motos

the torque keeps the motor in position when it is stationary and power is applied

what is the stepsperrevolution variable in the stepper motor control program

defines the number of steps motor must take to complete the full revolution

what is an IR receiver module

recevies infrared signals from an IR transmitter and convert them into electrial signals

how does the NEC protocol work in IR transmissions

NEC modulates a binary signal into infrared light pulse which are decoded by the IR receiver

what happens when an IR remote button is pressed

unique hex code is generated and sent to the IR receiver

what is a rotary encoder

converts the rotational changes in the encoder

what is the main purpose of an interrupt service routine (ISR) in rotary encoder

detects and handles rotational changes in the encoder