Rock Paper Scissor Game in Multisim

This article explains how to create a Rock Paper Scissor game in Multisim with two players and outputs for win, tie and lose. It includes the boolean logic expressions and circuit diagram.

Rock Paper Scissor Game in Multisim:
Two number of players.
Rock has advantage over scissor, scissor has advantage over paper and paper has advantage
over rock.
Inputs:
R1, P1, S1 (player 1)
R2,P2,S2 (player 2)
Outputs:
W1(player one wins)
W2( player 2 wins)
T (Tie)
If at least one or more players do not show one of the three inputs then all the outputs are
zero.
Truth table:
Input Player 1 Input Player 2 Output
R1 P1 S1 R2 P2 S2 W1(playe
r 1 wins)
W2(player
2 wins)
T(Tie)
0 0 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 0
0 1 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0 0
0 0 0 0 0 1 0 0 0
0 0 1 0 0 1 0 0 1
0 1 0 0 0 1 0 1 0
1 0 0 0 0 1 1 0 0
0 0 0 0 1 0 0 0 0
0 0 1 0 1 0 1 0 0
0 1 0 0 1 0 0 0 1
0 0 0 1 0 0 0 0 0
0 0 1 1 0 0 0 1 0
0 1 0 1 0 0 1 0 0
1 0 0 0 1 0 0 1 0
1 0 0 1 0 0 0 0 1
Boolean logic expressions:
W1 = R1*P1’*S1’*R2’*P2’*S2 + R1’*P1’*S1*R2’*P2*S2’ + R1’*P1*S1’*R2*P2’*S2’
W2 = R1’*P1*S1’*R2’*P2’*S2 + R1’*P1’*S1*R2*P2’*S2’ + R1*P1’*S1’*R2’*P2*S2’
T = R1’*P1’*S1*R2’*P2’*S2 + R1’*P1*S1’*R2’*P2*S2’ + R1*P1’*S1’*R2*P2’*S2’

Multisim Circuit diagram:
Sample Simulations:
Player 1: Rock(R1=1)
Player 2: Paper(P2=1)
Player 1: Scissor(S1=1)
Player 2: Paper(P2=1)

Player 1: Rock(R1=1)
Player 2: Rock(R2=1)

W1 voltage transient graph:

W2 voltage transient graph:
From the above two graphs it can be seen that the voltage in outputs W1 and W2 is 5 volts
when they win and it is 0 volts when they lose or any one of them are not playing. In the
similar way the output voltage T is 5 volts when there is a tie between the players i.e. each
one of them chose either of same element (Rock, paper or scissor) simultaneously, otherwise
the output T is 0.