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A Dynamo trigger, Dynamo target or activator was a device that could be activated with the Dynamo or the Hypershot. Activating it, it could unlock doors, create holographic platforms or activate elevators.
Ratchet & Clank: Going Commando
In Ratchet & Clank: Going Commando, Dynamo triggers were first found on Oozla, where Ratchet got the Dynamo. When they were activated, they helped Ratchet go to otherwise inaccessible areas, but many of those created obstacles as well.
Ratchet & Clank: Up Your Arsenal
In Ratchet & Clank: Up Your Arsenal, they were firstly encountered on the VR Gadget training course. These were actually enlarged versions of the previous game's triggers with a platform on top. They activated these platforms for a limited time, enough for Ratchet to use. On Obani Gemini, a similar to that of the previous game's target deactivated a forcefield of a small cave including a Titanium Bolt.
The object bore similarities with the Power cells in Jak and Daxter, although it might be a coincidence.