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               Connecting the L8047 Latching Campfire Simulator & N8X0X-084 Campfire Sound effect


Product & installation overview:

The L8047 is designed to generate enhanced lighting effects for either 2 series-wired LEDs or a single LED connected to its outputs (solder points 3 & 4) when power is applied to the inputs (points 1& 2), and will simulate the random flicker of a crackling campfire or fireplace. This module is not designed for incandescent (filament) type bulbs.

 The L8047 is programmed with correct timing to function with our N830X-084 or N850X-084 Sound modules.

Utilizing the industry’s smallest  microcontroller and associated voltage control circuitry, the total module consumes less than 1/2 ma. Typical peak operating current with the LED attached and running is about 18 ma. This makes it ideally suited for operation with batteries, or any well-filtered and regulated DC power source with an output of 6-18VDC.

Connecting the L8047:

Installing the L8047is very straightforward. Its tiny size and thin construction will allow it to be adapted to nearly any modeling scale.  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 which could cause a short  circuit.

Included with the module are three 6” lengths of #32 insulated wire. If desired, these can be used for power input & control wires. In this case, the red wire can be connected to solder point 1 (the +DC connection) and the black wire can be connected to solder point 2 (DC-). The violet wire can be connected to point 6 for input control. See Fig. 1 below.

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.

When connecting the LEDs, proper polarity must be observed. LEDs are “polarity sensitive” and will not function if connected backwards

                                                           Figure 1

When connecting the LEDs, proper polarity must be observed. LEDs are “polarity sensitive” and will not function if connected backwards.  The L8047 is configured to connect two series-wired 20 ma yellow LEDs with device voltages of 2.0 VDC between solder points 3 & 4. (this covers all of Ngineering’s yellow LEDs, as well as most yellow LEDs available). These LEDs will use the L8047’s on-board current protection resistor.

 Use wire appropriate for the size of the LED and its placement in the model. For two 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 and connect the cathode (- connection) of the second LED to solder point 3. For a single LED, connect one side of a 100-ohm resistor (supplied in this package with a spare) to solder point 4. Connect the other side of the resistor to the anode of the LED. Connect the LED cathode to point 3.

Figure 2 (below) is a schematic diagram of the connections required.


                                              Figure 2

                             Connection with N830X-084 Little Sounds Modules



                             Connection with N850X-084 Little Bigger Sounds Modules



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