Back to Games timer . Brief Games such as Articulate and Pictionary are provided with a sand timer to time the interval available for a player to take his turn. Timers like this give no audible indication at the end of the timed period and have the disadvantage that the next player has to wait for the sand to run through, even when the first player has finished his turn.
Subsystems Think about the brief.
To generate the timed intervals, a subsytem which produces pulses is needed. Suppose the subsystem which allows the signals to pass does not provide enough current to operate the audible warning device. You may not be able to come up with precise answers to these questions, but it should still be possible for you to work out a provisional block diagram , showing how some of the necessary subsystems should be joined together. This is just one of many possible block diagrams. The idea is to have an overall picture of the games timer which will enable you to start developing and testing parts of the circuit.