The ornamental design for a electroniccymbal, as shown and described.
FIG. 1 is a top perspective view of the electronic cymbal of the present invention;
FIG. 2 is a top view thereof;
FIG. 3 is a first side view thereof;
FIG. 4 is a second side view thereof;
FIG. 5 is a third side view thereof;
FIG. 6 is a fourth side view thereof; and,
FIG. 7 is a bottom view thereof.
The broken line showing of surfaces in FIG. 7 is for the purpose of illustrating environmental structure only, and forms no part of the claimed design.