How to make 24 second Shot Clock
Thinking of making your own 24 seconds basketball shot clock? Ever wonder how these digital clocks work? Let me tell you some basics understanding and how to design these digital clocks especially the 24 second shot clock. The 24 seconds shot clock in the basketball game is the time given to a team in possessing the ball. If the team failed to make a shot and the ball did not touch the ring within the 24 second shot clock, a 24 second shot clock violation is made. But if the team shot the ball and touched the ring, whether it went in or not, the 24 second shot clock is reset, given the team another 24 second possessing the ball and make another play. So without further ado, let me teach you on how to make the 24 second shot clock in basketball.
The Basic Plan
- Power up the board In this circuit a 1 Hz clock frequency is used to oscillate the 24 second clock, which will serve as the 'second-hand' of the analog clock and a 5V DC is used to power the board.
- The time extraction (hours, minutes, seconds) Since we only need the seconds time frame other components are not needed
- The LED of the 24 second shot clock should display the number 24 and the 24 second shot clock should stop at 00 second and stays there until the 24 second shot clock reset button is pressed.
The Difficult part
Finding a 1 Hz crystal oscillator is difficult to find, cause it is not available and some available in the market are in 120-Hz or 60-Hz crystal oscillator. In order to have an output of a 1-Hz oscillation, we need to divide it using a decade counter. Decade counter, as it name implies, divide the time by a decade (ten) and goes back to the starting value. Supposing we have a 60-Hz oscillator, the process of making it a 1-Hz oscillation can be seen here.
Building your own 24 second shot clock
The Materials:
- 14 pcs. 300 ohms Resistors
- 2 pcs. 7-segment display
- 2 pcs. 7448 IC
- 2 pcs 74190 IC
- 1 pc push button
- 1 pc SPST switch
- 1 pc. 7400 IC
Supposing you already have a 1-Hz clock source, the 24 sec shot clock can be configured in this way:
Resistors are used in order to protect the display from voltage fluctuations. Here you go, a fully functional 24 second shot clock, you can improve it by adding a buzzer whenever it reaches to 00 second. Thanks!
Please feel free to comment if this helps you or if you need any help. Thanks a lot
Resistors are used in order to protect the display from voltage fluctuations. Here you go, a fully functional 24 second shot clock, you can improve it by adding a buzzer whenever it reaches to 00 second. Thanks!
Please feel free to comment if this helps you or if you need any help. Thanks a lot
I am an egg tbh m8
ReplyDeletesir i connected it as shown in the figure but ot starts 99
ReplyDeleteThis comment has been removed by the author.
ReplyDeletecommon cathode na 7 segment ang ginamit
ReplyDeletehi sir i need your help about the circuit that you've provided
ReplyDeleteyes po sir?
DeleteBakit po sa 99 siya nag statart sir.
ReplyDeletewhen the timer goes to zero it dont reset to 24 seconds instead it goes from 0 to 9
ReplyDeletenormal lang ba may floating?
ReplyDeleteor gate lang pala yung kulang hehehe thanks
ReplyDeleteit can be add at buzzer trigger relay for 0?
ReplyDeleteSir pwede po ba ako pagawa ng shotclock lang at Magkano po ang Preston. Salamat
ReplyDeletePrice po ng pagawa. Salamat
ReplyDeleteSana my video po na provide.At circuit diagram po. Pwde niyo po bah akung bigyan?
ReplyDeleteGood day sir. Tanong lang po.. bakit yung ginawa ko mag display ng 24 piru hindi mag count down?
ReplyDeletehello po sir! bakit po yung ginawa ko ay hindi nag countdown and 88 po ang start?
ReplyDelete