This project is hardware to design a state machine. No need to simulate on Proteus. Just pen drawn

state diagram and explanation how it will be implemented using $74$ series ICs.

A Sony TV remote sends a string of $1$s and $0$s over IR Transmitter and it is received by a TV Receiver. One

form of code sent is a $12$ bit code $(5-$bit device type, followed by $7$ bit command$).$ There are $20-$bit versions

etc also but we will not discuss that. Following is code sent when a key is pressed. For a TV remote,

command type it is always $00001.$ For more information, please google. We will design our circuit only

for TV remote.

Type Code Device

$00001$ TV

$00010$ VCR $1$

$00011$ VCR $2$

$00110$ Laser Disk

$01100$ Surround Sound

$01000$ Cassette Deck $/$

Tuner

Command Code Function

$0000000$ Digit key $0$

$0000001$ Digit key $1$

$0000010$ Digit key $2$

$0000011$ Digit key $3$

$0000100$ Digit key $4$

$0000101$ Digit key $5$

$0000110$ Digit key $6$

$0000111$ Digit key $7$

$0001000$ Digit key $8$

$0001001$ Digit key $9$

$0010000$ Channel $+$

$0010001$ Channel $-$

$0010010$ Volume $+$

$0010011$ Volume $-$

$0010100$ Mute

$0010101$ Power ON$/$OFF

$0011000$ Contrast$+$

$0011001$ Contrastetc

Basic function is that you are given the IR Code and it is stored in a $12-$bit shift right register Called COM

register. The COM register contains values in reverse order. For example: Following is a code for TV

with Volume $+$

MSB Bit $1110987654321$ LSB bit $0$

$010010010000$

$1.$ Your design has many outputs connected to LEDs named CH$+,$ CH$-,$ V$+,$ V$-,$ and Power ON$/$OFF

$2.$ You circuit also has a $7-$segment display. It will display the DIGIT Key received, if received.

$2.$ You need to design a state machine with many BINGO states that receive these codes and displays

Digit Key on a $7-$segment Display if digit Key is pressed or else it turns on appropriate LED.

$3.$ State machine should get back to RESET to receive the next key.

$4.$ The COM register LSB output guides the state machine through various stages with every clock pulse.

Call the LSB output of COM register S$.$ Assume there is a clock that the shift register and the statemachine that moves from state$-$to$-$state depending on the S output of COM shift right register.

$5.$ You can design multiple state machine whose clock can be disabled and enabled as we advance the

input sequence. More detail in CEP lecture.