An experimental investigation of stall cell formation on a NACA0015 with aspect ratio AR = 2.67 was conducted via oil flow visualization (OFV) and stereoscopic particle image velocimetry (SPIV). A range of angles of attack near stall condition and at moderate to high Reynolds numbers (Re c ≈ 10 5 to 10 6 ) was explored. Stall cells were passively induced under conditions where they would otherwise not have been present using full and partial span trips, in the shape of either steps or zig-zag tape. It was observed that, in order to induce stall cells, a trip was required to introduce 3-D disturbances to the flow (either in the form of the trip's end effects or via spanwise undulations). A parametric study demonstrated that a step trip with spanwise length of 152.4 mm (30% of the span), successfully induced a single, large, clearly defined stall cell under conditions where a stall cell would not have otherwise occurred. A dynamic trip of the same dimensions was built, using a carbon-fiber beam driven by a piezoelectric bending-beam motor, in order to induce on-demand stall cell formation. Motion of the dynamic trip was calibrated and quantified to achieve the desired peak-to-peak motion, based on the static trip OFV observations. An RC circuit was used to reduce the actuator's overshoot and suppress undesired oscillatory behavior. This actuator was used to dynamically induce stall cell formation. However, the presence of the installed, flush actuator altered the flow field; the details are discussed. Using SPIV, the resultant flow field, incorporating the effect of the dynamic actuator, the evolution of the flow field (following the activation of the actuator) was observed using phase-locked data as a stall cell forms. The oscillatory behavior of the vorticity field is reminiscent of that observed by Amitay & Glezer (2002) during controlled flow reattachment process over a stalled 2-D airfoil.