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Basketball 24-second timer digital circuit

guduyueqh2010-02-07 20:01:21 +0000 #1
Jiqiu a digital circuit functions as possible from the 24-second timer
25,728,8772010-02-07 20:09:20 +0000 #2
This design is a simple application of pulse digital circuits, design a basketball contest 24 seconds and 12-minute countdown device. This timer is functional and can be directly cleared, start, pause, and continuous, as well as with the alarm function, the simultaneous utilization of seven-segment digital tube to show the time. This timer has started, pause, and a continuous function, you can easily achieve breakpoint timing function, when the timer is reduced to zero, the alarm signal will be issued. The design is completed in mid-timing function, achieved in a number of specific occasions of time tracking functions in social life also has a wide range of applications.

There are five modules in this circuit composed of: second pulse generator, counters, decoding display circuit, control circuit and alarm circuit. The direct control of the counter control circuit to start counting, pause / continuous counting, decoding show circuit display. When the control circuit of the set number is closed, the number in the digital tube display 24, when one seconds when the clock signal input to the counter, digital tube will automatically reduce the number of 1, when the timer is reduced to zero, alarm circuit and optical warning signal and the buzz issue.

Keywords: counter 24 seconds countdown display circuit decoding control circuit alarm circuit
flow lanes Blue2010-02-07 20:40:45 +0000 #3

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