Product & installation overview:

 The NK8035 is designed to generate slowly increasing & decreasing brightness for two alternating LEDs connected to the outputs (solder points 3 thru 6) when power is applied to the inputs (points 1 & 2).  The lighting effect is timed to accurately simulate the slowly rotating beacon in a lighthouse having a  white (incandescent) beacon on the front and a green beacon on the back of the rotating lenses.

 Utilizing the industry’s smallest  microcontroller and associated voltage control circuitry, the total module with LED consumes less than 20 ma. This makes the NK8035 well suited for low power applications such as battery operation but can easily be powered by any well-filtered and regulated DC power source with an output of 6-18VDC. The very small overall size of this module will allow it to be easily placed in and around any structure, even in Z-scale.

Connecting the NK8035:

 Installing the NK8035 is very straightforward. Because the module has circuitry on both sides, care must be taken to be sure that the components or wire solder points will not make contact with any metal object which could cause a short  circuit.

 This kit is pre-wired with input power wires already connected. The red wire is for connection to +DC and the black wire is for connection to –DC (ground). These wires are pre-tinned for easy soldering  to your power source. Figure 1 below shows a close-up of the circuit and wiring connections. Points 3 & 4 connect to the attached white LED, and points 5 & 6 connect to the green LED. Points 4 &6 are connected in common so there may be a single wire used for common anode connections to both LEDs.

Important note: A low-wattage iron with a pointed tip should be used for connection of wires. Too much heat or solder can easily damage the wires.

The white LED is a Ngineering N1022C high intensity Incandescent LED. It is quite bright and is constructed in a 2 X 3mm ceramic housing. The green LED is a Ngineering N1017 Micro Bright Signal green  LED. It is mounted just above the N1022C LED so both colors appear to be from the same source point. The brightest light output will be seen from the front of the LED surfaces, but these LEDs do also have relatively bright “side-shine” allowing good viewing over a horizontal angle of up to 150 degrees. Plan the positioning of the LEDs in your model to “point” them toward the middle of the viewing angle for best  effect.

 We recommend mounting the LEDs from the back by attaching adhesive to the wires near the back of the LEDs so adhesive is not placed directly on the LED. It is also recommended that whatever adhesive is used that it does not contain high aggressive solvents that could attack the insulation on the wires. Walthers Goo is an example of an “aggressive” solvent type adhesive. Elmers white Glue, CA (superglue) and 2-part epoxies are very safe for this type of mounting and will not damage wires or surfaces of your model in most cases.

 If the LEDs are to be mounted slightly above a flat surface, we recommend cutting a narrow slot from the edge of the surface to slide the wires into position where the LED is to be located. Then gluing the wires in position will be very easy and hold the LED in place while the adhesive dries.

 This completes hookup of our NK8035 Lighthouse module. We hope the added realism it provides enhances your enjoyment of the hobby.