The present application describes a programmable current controller for regulating an operating driving current flowing through an illumination source. A disclosed example method includes receiving a module including a plurality of function blocks, receiving an indication of a subset of the plurality of function blocks, and receiving an indication of a first sequence of execution for the subset, wherein the first sequence of execution is different than a second sequence of execution associated with the module. The output signals of the integrator circuit are periodically compared, and based on the comparison, output signals having a voltage representative of a value are generated. Such a force is configured to draw waste materials along a path towards said collection container. Each hood rear support guide mates with a lower hood bracket.