This article is about the Buffer added by Tubestuff. For the RedPower2 version, click here.
If you put a Wooden or Gold transport Pipe next to the Buffer, it will send one stack of items into the pipe every few seconds (depending on the number of empty slots - 5 seconds when empty, 0.5 seconds when full).
If you put a Filter next to it, with the input side of the filter facing the Buffer, the Buffer will output a Redstone signal to activate the Filter at the same rate and time that it sends items into the pipes.
Using Redpower materials:
Using Buildcraft materials (cheaper):