|Source Mod||RedPower 2|
The Transposer is a machine in the RedPower 2 mod which allows for items on the ground to be sucked up and sent through Pneumatic Tubes or Redstone Tubes and which draws items one by one from an adjacent Chest, machine or other inventory when a redstone signal is pulsed and sends them into Pneumatic or Redstone Tubes. It is a useful and inexpensive method of item transfer if automation is necessary. For a more versatile machine, one can utilise the Filter, which can draw full stacks of items, assign colours to items (for usage with painted tubes painted with a Paint Brush; items with a specific colour will move towards tubes of that colour) and sort items by only allowing certain items to pass through. However, the Filter has a slightly smaller range with which it can pick up items as compared to the Transposer.
Both the Transposer and the Filter have a small invisible internal inventory for storing items that either cannot be accepted by the output Tube, cannot be transferred to an output Tube or cannot be transferred to a machine or other inventory from the output Tube.
Both the Transposer and Filter require a redstone signal pulse to pull an item. A constant signal will disable either of them. The fastest a timer can activate them without disabling them is about once every 8 ticks, or every .4 seconds.
Here's a practical use of transposers for a bone meal dark room: