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Connecting the Utility Vehicle Flasher Simulators
Installing the N8074 is very straightforward. 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 and cause 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. If used, we recommend the red wire be used for the + DC connection. It would be connected to solder point 1 as shown in Fig. 1. This wire could also connect through a switch to the + DC connection for remote control of the lighting effect. The other (black) wire should be connected to – DC and to solder point 2.
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, decoder or module and void the warranty.
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.
Track powering (without a decoder connection)
All of our Simulators require a clean DC voltage of known polarity for their power source. Track power is typically provided in one of two forms. DC voltage (analog), or DCC.
Analog track power has been around for more than 75 years. Simply put, a DC voltage is applied to the two tracks with one being +DC and the other, -DC. Increase the voltage and the electric motor in the locomotive spins faster making the train go faster. If the train is required to reverse, track polarity is reversed so the loco's motor turns in reverse. Also, what defines "forward and reverse" is dependent on which way the loco is facing when it's put on the track. Bottom line here is that track polarity is not fixed. Our Simulator needs fixed polarity.
DCC track power is such that to devices requiring plain DC voltage, it looks like AC power. That is because voltage levels on each track go both + and – continuously. The DCC decoders in locomotives “descramble” the track signals and provide correct polarity so their motors can function normally. It is this process that will allow multiple locomotives to go in different directions on the same section of track, at the same time (a feature not available with analog track power). Once again, our Simulator needs fixed polarity and it needs to look like DC voltage.
Due to our Simulator's very small size, there is insufficient space to include additional circuitry and components necessary for proper power conditioning when direct track pickup is to be used. There are two solutions to this problem and both are inexpensive:
When connecting the LEDs, proper polarity must be observed. LEDs are “polarity sensitive” and will not function if connected backwards. The N8075 is configured to connect up to two series-wired pairs of 20 ma yellow LEDs with device voltages of 2.0 VDC between solder points 3 & 4, & 5 & 4. (this covers all of Ngineering’s yellow LEDs, as well as most yellow LEDs available). These LEDs will use the N8075’s on-board current protection resistor.
Use wire appropriate for the size of the LEDs and their placement in the model. For two series pairs of LEDs, connect the first LED anode (the + connection) to solder point 4. Connect the cathode (- connection) of this LED to the anode of the second LED in the pair and connect its cathode (- connection) to solder point 3.
For the second pair, connect the two LEDs as above, except connect the second LED cathode in the pair to point 5.
For two single LEDs, connect one side of a 100-ohm resistor (supplied in this package) to solder point 4. Connect the other side of the resistor to the anode of the LED. Connect the LED cathode to point 3.
Connect the second LED as above except with its cathode wired to point 5.
A single series pair, or a single LED with resistor can also be connected for smaller vehicles that require an effect that doesn’t alternate. Figure 4 (below) is a schematic diagram of the connections required.
This completes connection of the N8075 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.
© 2011 Ngineering