Abstract: A rotary pulse generator is disclosed which generally includes a wheel rotatable about an axis. The wheel has a plurality of protrusions which deflect a piezoelectric element in a deflection zone. Several embodiments are shown. The various features include a thumbwheel in which the turning surface has teeth on it serving as the protrusions, a thumbwheel in which the teeth are directed radially inwardly, a push/pull knob which places the wheel in alignment with a selected one of three piezoelectric elements, and a wheel held in selected positions by an indent/detent mechanism with rods extending out of the side of the wheel to deflect the piezoelectric element. Yet another embodiment provides for the combination of linear and rotary pulse generation. Another form provides four sets of indicator locations with a location from each of the sets forming an aligned row of indicator locations.