PULSE GENERATOR is really no problem at all. The Model 2110 was
designed to be used with our 2040 USB/20 Button INTERFACE. All you
need do is to plug the 17x2 Ribbon Cable between the Pulse
Generator and the 2040 Interface.
With the 2110
Board positioned as seen above, take the Ribbon Cable and place the
cable onto the J4 connector. Note the RED Tracer is to be towards
the top of the board.
Now, take the other
side of the Ribbon Cable and carefully place it on the J1 Connector
of the 2040 Interface Board as seen above.
What you get is
pictured above; both boards mated via the Ribbon Cable
Connection to your
computer's USB Port is made by a Series "B" USB Cable
connected to the 2040
Notice that J2 is still
available for wiring 10 Spring Return Push Button
Please note that the
2110 Pulse Generator can NOT be placed on the J2 connector of the
switches to the 2110 board is made via the J3 17x2 connector located
on the left side of the board. For "Simple Wiring", each switch
needs a two-wire connection to J3. For ten Switches this means that
the first 10 pair of J3 pins are used. The remaining pins on the J3
are not needed at this time.
Below is a photo of
the J3 connector and how each switch is connected.
Below is a drawing on
wiring a SPST Toggle Switch. Soldering just two wires is all it
takes to get the 2110 up and running. To make the process even
simplier, we also included ten 1x2 female connectors (see photo to
left). The wires from the toggle switch is soldered to the two pins
on this connector. It is strongly recommended that shrink tubing or
some other insulation be used on the connector. The spacing on the
connector is only 0.1 inches, so creating a wire short or solder
bridge is a very real possibility.
Using this simple
circuit, build 9 more Toggle Switch Assemblies. When wired, it's
time to install the switches to the 2110 Generator.
Below is another photo of
the J3 Connector on the 2110 board. Here you can see the pin number
configuration of J3. In order for the 2110 board to sense the
closure or opening of a toggle switch, a 5 VDC signal must be
delivered to the PIC chips. Pins 1,3,5,7,9,11,13,15,17,19 are all
connected to +5V. These pins can be called the "Common" connections
while pins 2,4,6,8,10,12,14,16,18,20 are called the "Control"
So for the 2110 board to
sense a switch closure, you must short anyone of the "Common" pins
to any of the "Control" connections.
So, this being the case,
complex Aircraft Panel designs need to bring ONLY ONE "Common" wire
from the 2110 board (any of these- 1,3,5,7,9,11,13,15,19 from J3)
and 10 "Control" wires. (2,4,6,8,10,12,14,16,18,20 from
Below is a drawing on
doing just that. This photo depicts 5 Toggle Switches with its
terminals all soldered
together and then soldered to any of the +5VDC "Common" Pins of the
J3 connector (either pin 1 or 3 or 5 or 7 or 9 or 11or 13 or 15 or
17 or 19)
Now solder either
end terminal (Shown in Black) to J3's "Control" Pins. As seen above,
these Control pins are pin 2, pin 4, pin 6, pin 8 and pin 10.
Needless to say, you can also solder additional toggle switches to
the remain 5 control pins (pins 12, 14, 16, 18,
The photo above shows I
used a toggle switch called a SPDT (Single Pole Double Throw). These
switches too can be used without any adverse efects to the circuit.
These SPDT switches can be purchased in any electronics store. Just
make sure you purchase the switches that DO NOT HAVE A CENTER OFF
I've shown you wiring a
SPST and a SPDT Togle Switch to the 2110 board, but what about
Mechanical Rotary Switches? No Problem. As you already know, the
flightdeck of a 737, 767, 747 ect also have rotary switches to
select between flight functions. Below is a drawing on how we can
wire the 2100 board to a 5 position Mechanical Rotary Switch (You
can also use switches with less then 5 positions or one with
more then 5 but less then 10 positions).
Just like the wiring of
multiple Toggle Switches seen above, we can use just 1 "Common" wire
(+5VDC) and 5 "Control" wires. Take a Rotary Switch and turn it over
to look at the side with the solder terminals. You will see
something similar to the photo above.
The common terminal of
the rotary switch is soldered to any of the "Common" wires on the
2110's J3 connector, while all the "Control" wires are soldered to
the switches "select" output terminals. That's all there is to it.
If you have a rotary switch with more then 5 positions, just
continue soldering wires to J3's remaining "Control"
When purchasing a
Mechanical Rotary Switch for your panel, NO NOT get one called a
"MAKE BEFORE BREAK". This type of switch connects the next terminal
to its common pin before breaking its connection with the previous
terminal. You need to purchase a switch called a "BREAK BEFORE
Also note that the 2110
board will create a two pulses for each position selected by the
rotary switch. For Example, say you have the rotary switch in its #1
position and you want to turn it to its #2; the 2100 Board will
create a pulse upon leaving the #1 position before creating another
pulse when in its #2 position. In other words, the 2100 will
create one pulse when you flip to a rotary position and create a
second pulse when you leave that position for another.
Some of you might
want to add an LED light to turn ON when the Flight Function is
activated. This can be very easily done as you can see from the
RED or GREEN LED (Light Emitting Diode) and one 330 ohm Carbon
Resistor is all it takes.
As seen above, the FLAT
side of the LED (LED Casing) is soldered to the GND point on the
2040 USB Interface while the Round side is wired to the outside
terminal of the toggle switch through a small 330 ohm resistor. Now
when you flip the toggle UP, the +5VDC not only goes to the 2110
board as a control signal, it also powers the LED which is now
directly across the 5 volt power delivered to the boards via the
computer's USB Port.
If you wish to have
multiple LEDs on your panel, just connect all of the LED's (flat
side) together, then taking one wire from this LED common point to
the GND of the 2040 board. The other side of all the LEDs are to be
soldered to the outter terminal of the remaining toggle