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You can play this game alone or
with your friends. The circuit comprises a timer IC, two decade counters and
a display driver along with a 7-segment display. The game is simple. As stated
above, it is a scoring game and the competitor who scores 100 points rapidly
(in short steps) is the winner. For scoring, one has the option of pressing
either switch S2 or S3. Switch S2, when pressed, makes the counter count in
the forward direction, while switch S3 helps to count downwards. Before starting
a fresh game, and for that matter even a fresh move, you must press switch S1
to reset the circuit. Thereafter, press any of the two switches, i.e. S2 or
S3. On pressing switch S2 or S3, the counter’s BCD outputs change very rapidly
and when you release the switch, the last number remains latched at the output
of IC2. The latched BCD number is input to BCD to 7-segment decoder/driver IC3
which drives a common-anode display DIS1. However, you can read this number
only when you press switch S4. The sequence of operations for playing the game
between, say two players ‘X’ and ‘Y’, is summarised below:
1. Player ‘X’
starts by momentary pressing of reset switch S1 followed by pressing and releasing
of either switch S2 or S3. Thereafter he presses switch S4 to read the display
(score) and notes down this number (say X1) manually.
2. Player ‘Y’ also
starts by momentary pressing of switch S1 followed by pressing of switch S2
or S3 and then notes down his score (say Y1), after pressing switch S4, exactly
in the same fashion as done by the first player.
3. Player ‘X’ again presses
switch S1 and repeats the steps shown in step 1 above and notes down his new
score (say, X2). He adds up this score to his previous score. The same procedure
is repeated by player ‘Y’ in his turn.
4. The game carries on until the
score attained by one of the two players totals up to or exceeds 100, to be
declared as the winner.
Several players can participate in this game, with
each getting a chance to score during his own turn. The assembly can be done
using a multipurpose board. Fix the display (LEDs and 7-segment display) on
top of the cabinet along with the three switches. The supply voltage for the
circuit is 5V |
