Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

10 min clock of a basketball scoreboard

Status
Not open for further replies.
S

Sheheryar

Newbie level 4
Joined
Apr 22, 2007
Messages
5
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,313
Hi eerybody!
i just wanted to know how could we build a 10 min clock that is displayed on a scoreboard( for eg basketball)
i know how using 555 timer and the 7 segments driver and decoder and all..... but do i hav to use a time base?? and how wud i b able to run the clock backwards??? ie from 10 mins to 9 and then 8 and then till the clock ticks to 00:00??
plz help!!!(urgent) i wud b really grateful if anyone cud provide me an doc or web link or gud images???
(any webpage showing how a clock used on a scoreboard is used!!!!)
Thanks a bunch!
Sheheryar!!
 

Hi Dear Sheheryar!

I recommand you to use a simple microcontroller; e.g. PIC16F84A. It's easy to use and strong enough to do what you want.

Thanks!
 

Dear Mansur Bhai!
I cannnot (not allowed) to use a microcontroller!!
i have made the counter.... but still i am havin problems in developin the 10 min clock !!
shld i use 555 or an oscillator9crystal) or wat??
 

cant it b done with using a 555 timer???
 

yes you can use 555 timer but it is less accurate.
 

well that can b adjusted usin a variable resistor i guess!

and..... which ic (ttl) should i use for downwards counting ie from 9 thenn 8 then 7 till 0??
 

Sheheryar said:
well that can b adjusted usin a variable resistor i guess!

and..... which ic (ttl) should i use for downwards counting ie from 9 thenn 8 then 7 till 0??
Click to expand...
But you'll have to calibrate often to keep it in accurate.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top