i havent the slightest clue how the yeast bomb works and its stopping me from obtaining tungsten, help would be appreciated

Ok it's probably good that this is its own topic, as the mechanics around the yeast bomb (and the logic system in general) can be a little opaque. To activate the yeast bomb, control left click somewhere while holding the bomb (this will set its source coordinates), and then place the bomb next to the ore you want to blow up. The bomb will explode when you place an item at the source coordinates that you set. You can also activate the bomb using other logic components such as the logic switch or logic gate. 

This same idea applies to other logic components too. The logic gate will open when there is an item at source, or when there is an active logic component at its source. The logic gate is active when it is open, but other components may have a different condition for being active. The logic switch in its button morph for instance is active for as long as you are holding left or right click over it. The recipe book has more information on what logic components do.