PLEASE HELP TROUBLESHOOTING 555 timer!

[kristofferbernardo]

help 555 timer with 7 segment display


from this circuit the 7segment display start at 30 down to 0. and i want to make starting to 15 down to 0.
pls help me the deadline of this project is near.

 

[Ian Rogers]

Putting Three threads will not benefit you whatsoever.... PLEASE don't do it again

 

[kristofferbernardo]

im sorry sir im newbie here.i repost it because there is no picture attached. im very sorry

 

[kristofferbernardo]

ian rogers pls reffer my thread..i want to finish this project if not i will failed my subject pls!

 

[Ian Rogers]

I bet you have no circuit.... If you don't understand the circuit you have.. How can we help you... You have a binary counter there.. The 555 is just a clock... You need to work out what gates you need to change in order for the display to start at 15 not 30...

Someone will help you if you show us that you try it for yourself first..

 

[kristofferbernardo]

im trying it now sir!

 

[DerStrom8]

Yelling will not help you at all. You don't need caps lock or so many exclamation points. They make it look like you're screaming at people, and I can assure you I will not respond if I see that sort of post.

 

[audioguru]

EEK!
Why are you using old fashioned power hungry TTL ICs??
I finished using old TTL ICs about 35 years ago and have used Cmos ICs ever since.

 

[kristofferbernardo]

hi audioguru can you help me?

 

[kristofferbernardo]

time is gold

 

[DerStrom8]

kristofferbernardo, re-read Ian's post.

I bet you have no circuit.... If you don't understand the circuit you have.. How can we help you... You have a binary counter there.. The 555 is just a clock... You need to work out what gates you need to change in order for the display to start at 15 not 30...

Someone will help you if you show us that you try it for yourself first..

 

[audioguru]

hi audioguru can you help me?

Sorry.
I am a modern audio guy. I do not do old fashioned TTL logic anymore.