The ornamental design for an ledstripcontroller, as shown and described.
FIG. 1 is a front perspective view of an LED strip controller showing my design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front side view thereof;
FIG. 4 is a rear side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a top elevational view thereof; and,
FIG. 8 is a bottom elevational view thereof.
The broken line showing the LED strip controller in FIGS. 1-8 are included for the purpose of showing environmental structure of an LED strip and form no part of the claimed design.