G-Scale Graphics LSCM2 Specification sheet

Page
Revision C: Updated 2/19/2020
Operation and Installation Manual
G-Scale Graphics
5860 Crooked Stick Dr.
Windsor, CO 80550
70-581-3567
[e-mail]
www.GScaleGraphics.net
Revision New: Updated 2/19/2020
Light & Sound
Control Module

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LSCM2
The Light & Sound Control Module is intended for use in a large scale garden railroad building to control indi
vidual room lights and sounds to simulate activity in the building.
Four outputs (L1 L4) are dedicated to operating room lights in a random fashion to simulate activity in the building.
Two more outputs (S5 and O6) can be user configured to operate 12V LED light strips, light bulbs, sound boards,
and other loads up to 500ma. They can be triggered via switch inputs, motion detectors, or set for random opera
tion.
The LSCM uses an Arduino as the controller, which allows users familiar with Arduino programming to modify the
factory program or create their own custom application.
Input Power
Input power should be 12 VDC (not AC). We have a
low cost plug in power supply available (Not included
with LSCM). It can be used to power all of your build
ing’s LSCM’s and Sound Clip Modules. Extend 22 ga.
Wire from the adapter plug as needed around your
railroad.
A 3 pin On/Off jumper header is provided on the
board. Or a SPST switch can be connected to the ON
terminals for remote on/off capability.
The on board light sensor can be used to turn on lights at night. Turn adjustment counter clockwise until lights just
turn on at desired darkness. This option should be used when powered by a 12V power supply, as there will be a
small current draw with lights off which would drain batteries. Turn adjustment full clockwise to keep lights and
other outputs enabled during the day.
Outputs
All outputs are open collector, i.e. the output terminal is connected to common (power ) when activated. The
other side of the load needs a power source. 12V LED strips should be connected to the V terminal (+12V), and a
sound board will have its own internal pull up resistor to provide the power it needs. (See wiring diagram). Total
current draw for all outputs summed together must not exceed 500ma.
Four outputs (L1 L4) can be used for room lighting. Output 1 stays on most of the time and should be assigned to
a main room, while Outputs 2,3,4 turn on and off randomly at shorter intervals indicating activity in the other
rooms. A built in light sensor will turn these outputs on at night, and off in the daytime.
Output S5 can be used to trigger a sound module. The trigger can be initiated via a switch (momentary push
button), a motion sensor, or just trigger at random intervals. (See User Programming below).
Output O6 can be used to turn on lights or any other kind of 12V load (See Specification below for max current).
Outputs S5 and O6 are not affected by the light sensor.

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Programming
The DIP switch is used to configure the op
eration of Inputs 1 and 2, and Outputs S5 and
O6.
Inputs 1 and 2 can be used to trigger lights
and sound via switch contacts. Closing In1 or
In2 to terminal C (common) activates. Inputs
1 and 2 can also be used with our motion de
tector module. (See wiring diagram).
Output S5 is always used as a sound trigger.
It will switch low (to common) momentarily to
activate the sound.
Output O6 can be used to operate 12V LED
strips, lights, or other loads.
The Arduino FTDI programming port is used
for factory programming, and can be used by
experienced Arduino programmers, if desired, but you are on your own ! We cannot support your programming
efforts.
In1,In2 S5,O6 Configurations
Note: Power down after making a change to the DIP switch. Your changes will take ef-
fect upon power-up.
Light Sensor
Arduino FTDI Programming Port
On/Off Jumper
Light Sensitivity
Adjustment
DIP Switch
0 0 0 0
S5 is triggered by a momentary switch closure; In1 to Common.
O6 is turned ON by a momentary switch closure: In2 to Common,
and turned OFF automatically 30 seconds later.
1 0 0 0
S5 is triggered automatically at random intervals. (In1 is not used).
O6 is turned ON by a momentary switch closure: In2 to Common,
and turned OFF automatically 30 seconds later.
0 1 0 0
S5 is triggered automatically at random intervals.
O6 is turned ON by a momentary switch closure: In1 to Common,
and turned OFF by a momentary switch closure: In2 to Common. (Could be used for a grade
crossing light, turned on and off by reed switches in the track, magnet on the loco).
1 1 0 0
S5 is triggered by motion detector (detector output to In1, detector power from In2).
O6 is turned ON by a momentary switch closure: In1 to Common,
and turned OFF automatically 30 seconds later.
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON

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Installation
The board needs to be protected from the weather and water. Additional protection, other than just the structure it may
be placed in, is recommended. e.g. a small plastic project box (e.g. www.AllElectronics.com CAT# TB 2) with a hole just
large enough for wiring entry/exit.
LED Strips
Our LED Strips (available separately) have ei
ther 3 LEDs or 6 LEDs with 12” of either bare
wire, or terminated in a locking connector.
Power Distribution
You only need one 12V power supply for all of your buildings. Route the 12V supply
around your layout and then use 2 wire locking connectors at each building to allow easy
removal of the building from the layout for maintenance or storage.
PIR Motion Detector
PIR stands for Passive Infra Red. Our sensor will detect motion within about 10 feet. It is connected to the In1,In2 and C
terminals. Make sure the of the connections, as reverse polarity will damage the PIR !
Building Power Connectors

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FTDI Programmer
(Not included)
Arduino
The LSCM2 is shipped with an Arduino Pro Mini. It can be programmed using the Arduino IDE software and an FTDI to
USB serial programming adapter. Further explanation of the Arduino environment and programming is beyond the scope
of this manual.
LSCM2.ino is the source code for the default program. This is an excellent starting point to modify or create you own
application for the LSCM. LSCM2.ino can be downloaded from our website.
Arduino I/O
In1 2 Contact closures to common, terminal “C”.
In2 3
L1 4 Open collector outputs
L2 5
L3 6
L4 7
S5 8
O6 9
LDR A0 Light Dependent Resistor
DIP1 10 4 position DIP switch
DIP2 11
DIP3 12
DIP4 13 Not used
VCC 3.2V or 5V Used to power LDR
LSCM2 Scenarios ...
for use with 12V LED strips and Sound Clip Modules
 Random house lights 4 LED outs latching on/off at random intervals. L1 thru L4 are always random light outputs
under program control.
 House sounds Random, PIR (or other input) triggers. 1 or 2 Sound outputs.
 External loads Random, PIR (or other input) triggers. 1 or 2 Lights or other loads.
 Grade Crossing 1 input (reed switch) turns output ON, the other input turns it OFF
 S5 and O6 are user programmable via DIP switch.

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Page 7
LSCM2 - Hardware Specifications
Revision “New”
Mechanical
PCB: 2.2”L X 1.7”W X 1.75”H
Electrical
Power Input: 12 VDC from battery pack or DC power supply at terminals “ 12V+”.
12V nominal to operate 12V LED strips. LSCM will operate from 6 to 12.6VDC max.
Reverse polarity protection.
Power Outputs: Voltage output to loads on terminal “V” equals input voltage minus 0.6V.
Control Inputs In1, In2
Normally open, momentary close to common
With DIP 1 and 2 ON, In2 provides 5V power to motion detector (25ma max).
Control Outputs L1 L4,S5,O6
Open collector outputs, rated for a total of 500ma max.
Made by G-Scale Graphics in Windsor, Colorado, USA
This optional mounting base and
cover provide some minimal protec
tion from the weather. However, the
module still needs installed in a pro
tected space.
The base provides a nice flat insu
lated mounting surface to protect the
PCB circuitry. The cover provides
some protection for the Arduino mod
ule, while leaving the user controls
and light sensor exposed.