How to use Redstone dust in Minecraft PE?
Solution 1:
Redstone circuits haven't been added to pocket edition yet. Currently, the only uses of redstone are certain crafting recipes such as powered rails.
Solution 2:
Pe 0.8.1 or 0.8.0 has redstone dust as a collectable item but is only use for compasses clocks and powered rails
Solution 3:
It's really bad that redstone circuits haven't been added yet, so all you can do is make compasses, clocks and rails. Let's hope for those iron doors soon! :)