Abstract: A circuit is described which allows an LED driver to be controlled by a control signal in such a manner that at a predetermined dimming level the output current goes to zero instead of continuing to indefinitely low dim levels, thus avoiding the possibility of flickering or shimmer at extremely low dim levels. An electronic circuit for driving an LED load with a conventional LED drive circuit has inputs connected to a power source and output terminals providing regulated output power including a load disconnect switch in series with the LED load which has a control node responsive to a control circuit; and a control input which commands varying levels of input power. The control circuit is configured to be responsive to the control input so that when the control input corresponds to a certain continuous level of dimming, the load disconnect switch is opened.

Abstract: A circuit is described which allows an LED driver to be controlled by a control signal in such a manner that at a predetermined dimming level the output current goes to zero instead of continuing to indefinitely low dim levels, thus avoiding the possibility of flickering or shimmer at extremely low dim levels. An electronic circuit for driving an LED load with a conventional LED drive circuit has inputs connected to a power source and output terminals providing regulated output power including a load disconnect switch in series with the LED load which has a control node responsive to a control circuit; and a control input which commands varying levels of input power. The control circuit is configured to be responsive to the control input so that when the control input corresponds to a certain continuous level of dimming, the load disconnect switch is opened.

Abstract: A method of welding two workpieces together is described. A conductor in electrical communication with a pulse circuit is provided. A portion of the second workpiece is located adjacent the conductor. The two workpieces are also located together. A portion, or all, of one workpiece is welded to the other by applying a pulse current to one of the workpieces. A method of forming a workpiece is disclosed using a pulse current to move the workpiece into a desired shape.

Abstract: An LED driver has a power supply configured to receive power from a power input. A primary controller configured to receive power from the power supply and output power to a power output. The power output is configured to be connected to LED lights. A dimmer provides a dimming signal, and the dimmer has an adjustable voltage circuit. An offset voltage is added to a ground path on the adjustable voltage circuit. The offset voltage can be created by a silicon diode adding the offset voltage to a transformer's secondary winding ground path on a DC regulated voltage circuit. The adjustable voltage circuit can be formed as the DC regulated voltage circuit. The DC regulated voltage circuit is a 10 VDC regulated voltage circuit.

Abstract: A method for protecting joined workpieces from salt or other environmental hazards is described. The method may include joining an end fitting into a driveshaft tube which results in a gap between the two. The gap may be cleaned and dried before a moisture protecting urethane coating is applied. A urethane coating may be sprayed on as the joined end fitting and tube are rotated together. The coating penetrates into the gap and extends laterally beyond the gap and is subsequently cured with an ultraviolet light source.