The invention relates to a method for producing protoplasts of cassava or closely related species, which protoplasts are capable of regeneration into plants. The optical waveguides are subsequently fed into an extruder, where the extruder forms a slot element around the optical waveguides. A comparator circuit can compare the output signal with a predetermined threshold value and when the alarm signal is equal to or greater than the threshold value, it can activate a control circuit for activating an alarm signal indicating an abnormal condition in the coin dispensing apparatus. The effect mapper is in communication with the controller, and is configured to produce multiple haptic instructions in response to at least a portion of the received effect instructions. A projecting portion of a hook member can be engaged with or disengaged from a notch portion of a turning bracket.