time when the led is turned on by voltage e 415 being applied across led 103 and resister 416 resistor 416 limits the current in the led to appropriate current levels for the led for the duration of the t on time interval the voltage e 415 is equal to v on which is sufficient voltage to keep led 103 energized for it to emit light the present invention is not limited to usb 2 0 or usb 3 0 cables and their connectors nor to male only or female only plugs the present invention is not limited to particular cable lengths of one foot one meter or two meters any length of cable may be used consistent with power supplied by the power source the present invention may thus have utility in a wider set of applications than only the cell phone battery charging application described herein as for example in lighting up an led held by a particular connector and thereby identifying that particular connector out of a sea of connectors plugged into a connector array panel notably a connector panel of 100 connectors by 100 connectors equals a large number of 10 000 connectors for example a touch sensitive capacitor circuit of the type shown in fig4 can be positioned within an overmold in a connector plug not shown or jack not shown located at the distal end of cable 104 i e adjacent or abutting power source 205 instead of being positioned as shown with wiring running through cable 104 from the power source through the distal plug or jack to an led such as led 103 in its depicted position at the other end of the cable in this example conductors 417 and 418 in.