A lost motion assembly for a valve of an internal combustion engine includes a cam, a cam piston which is spring biased to follow motion of the cam, a valve piston operatively engaged with a poppet valve, and an auxiliary piston. A plurality of inputs and outputs may be coupled to the volume hologram. The DLC film 125 can be easily formed on the resin film, and has high heat conductivity, so that the film can be made to function as a heat radiating layer. A connector detachably connects the receptacles.