A pleat counter and methods are provided to accurately count the number of pleats in a corrugated sheet of material to be used for the production of air filters. The pleat counter comprises a pleat detector mounted underneath a mounting board for counting the pleats. The mounting board is configured to position the pleat detector adjacent to the corrugated sheet of filter material. The pleat detector includes one or more sensors configured to detect the presence of individual pleats comprising the corrugated sheet. The pleat counter includes an interface configured to enable coupling the pleat counter with a data processing system. The data processing system may comprise any of a desktop, a tablet, a server, a mobile phone, a media player, a personal digital assistant (PDA), a personal communicator, a network router or hub, a wireless access point (AP) or repeater, a set-top box, or a combination thereof.

Examples of methods and devices provide a charge level indication of a removable power source of a lighting control device. An example method may include receiving an input indication. A duration of the input is measured. If the measured duration exceeds a predetermined input duration threshold, an indication of a charge level of a removable power supply is obtained. The obtained charge level indication is compared, by a control unit, to a threshold charge level of the power supply. The threshold charge level is indicates an amount of charge remaining in the power supply. In response to a comparison result, an indicator light signal is applied to an indicator light. An example device may include a removable electrical power supply, an input device, an indicator light, and a control unit all of which may cooperate to perform a disclosed method.

Examples of methods and devices provide a charge level indication of a removable power source of a lighting control device. An example method may include receiving an input indication. A duration of the input is measured. If the measured duration exceeds a predetermined input duration threshold, an indication of a charge level of a removable power supply is obtained. The obtained charge level indication is compared, by a control unit, to a threshold charge level of the power supply. The threshold charge level is indicates an amount of charge remaining in the power supply. In response to a comparison result, an indicator light signal is applied to an indicator light. An example device may include a removable electrical power supply, an input device, an indicator light, and a control unit all of which may cooperate to perform a disclosed method.

Examples of methods and devices provide a charge level indication of a removable power source of a lighting control device. An example method may include receiving an input indication. A duration of the input is measured. If the measured duration exceeds a predetermined input duration threshold, an indication of a charge level of a removable power supply is obtained. The obtained charge level indication is compared, by a control unit, to a threshold charge level of the power supply. The threshold charge level is indicates an amount of charge remaining in the power supply. In response to a comparison result, an indicator light signal is applied to an indicator light. An example device may include a removable electrical power supply, an input device, an indicator light, and a control unit all of which may cooperate to perform a disclosed method.

Examples of methods and devices provide a charge level indication of a removable power source of a lighting control device. An example method may include receiving an input indication. A duration of the input is measured. If the measured duration exceeds a predetermined input duration threshold, an indication of a charge level of a removable power supply is obtained. The obtained charge level indication is compared, by a control unit, to a threshold charge level of the power supply. The threshold charge level is indicates an amount of charge remaining in the power supply. In response to a comparison result, an indicator light signal is applied to an indicator light. An example device may include a removable electrical power supply, an input device, an indicator light, and a control unit all of which may cooperate to perform a disclosed method.