connect_N8090

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Connecting the Dual Roto-Ray Simulator for 3 series-wired pair of red & blue LEDs

Product & installation overview:

The N8090 simulates the effect of two rotating Roto-Ray warning lights by sequencing 6 LEDs connected to its output (pins 3 - 6) when power is applied to the inputs (pins 1 &2). These rotating LEDs can be wired as roof beacons for early-era police vehicles if desired using Nano sized LEDs. This module is not designed for use with incandescent (filament) type bulbs.

Utilizing the industry’s smallest micro-controller and associated voltage control circuitry, the total module consumes less than 500 µa. Typical peak operating current with an LED attached and running through a full brightness curve is about 18 ma. The N8090 includes on-board current protection for the LEDs, so wiring is very simple. The low-current draw of this product makes is well suited for battery power, but it can also be powered by any well-filtered and regulated DC power source with an output of 6-18VDC.

Connecting the N8090:

Installing the N8090 is very straightforward. Its tiny size and thin construction will allow it to be placed in many spaces even Z-scale applications. Because the module has circuitry on both sides, care must be taken to be sure that the components or wires soldered will not make contact with any metal object (such as a locomotive metal frame) causing a short circuit.

Included with the module are two 6” lengths of #32 insulated wire. If necessary, these can be used for power input wires. The red wire should be soldered to solder point ! (+DC input) and the black wire to solder point 2 (–DC input).

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 or module and void the warranty.

When connecting the LEDs, proper polarity must be observed. LEDs are “polarity sensitive” and will not function is connected backwards. The N8090 is configured to connect 3 series-wired pairs of 20 ma LEDs, with one red and one blue LED in each pair.

Figure 1

Also, all connecting wires should be pre-tinned before soldering them to the module. This will make connection quick and easy and ensure excessive heat is not applied to the solder points.

Connecting LEDs

As shown in Figure 2 below, LEDs 1, 2 & 3 should be for rotating group 1 (all red LEDs) and LEDs 4, 5 & 6 should be for rotating group 2 (all blue LEDs.). Wire lengths between the anode and cathode of each pair need to be long enough for proper routing of LED placement for each 3-LED group.

Figure 2 shows a schematic layout of wiring connections

Once again, be sure to use a low-wattage soldering iron when connecting wires to the module.

LEDs are noted with "A" = Anode and "C" = Cathode

Figure 2

This completes connection of the N8090 module. It is recommended that a thorough re-inspection of all connections and module placement be performed prior to applying power. We hope you enjoy the added realism our module provides.