"Back" clock

[PanTobi]

Hello ;x... i'm Tobi and my english is bad ^_^ sorry...

i have problem ;c i need clock... but not clock what is adding numbers...

i need clock from "1000" or "500" or something like this to "0"
egh...

500
499
498
497
496

working like this from 500 to 0
and i have it... but im not sure my clock is good ;/...

last time, you was help me make it better ^_^ maybe this time u can upgrade my clock too

there should be image ;x...

Cloock.png (1.13 MiB) Viewed 1750 times

if u can't see img.
Google: https://drive.google.com/file/d/0Bzqj_n ... sp=sharing



//Edit:
Just help me make it better ;D !...

[Permittivity]

You can do this with three combinators instead of the two for a normal forward clock. In short, the third combinator is used to make the clock reset to a non-zero value when it reaches its limit.

BackClock.jpg (215.5 KiB) Viewed 1743 times

The first two combinators act as a normal clock. The constant combinator outputs negative 1 to make it count backwards by ones. The decider combinator resets the clock at -501; this gives a clock that counts backwards from -1 to -501. The final arithmetic combinator just uses addition to shift the range from there to the 500 to 0 range that you asked for.

[PanTobi]

Wow nice ^_^
but maybe can we do it with only 2 combinators ? ...

Any ideas ? ;x...

[Deadly-Bagel]

If you count away from 0 you need something to reverse the signal. If you count towards 0 you need something to reset it back to the original value. I don't think two combinators is going to work.

You might be able to link an Arithmetic Combinator to itself with something like [A - 1 => A] but you still need something to reset the signal. A decider on its own can only reset it to 1 which is kinda pointless but if the start value is external you can use a decider to plug it back in to the loop.