For ease of assembly, you should print some of these schematics and diagrams before you begin. In most cases you will want to view the images in 'full scale'.
Main Schematic
Breadboard Component Layout
Breadboard Wire Assignments
Resistor Assignments
DB-9 Wiring Layout
The USB breadboard should already be soldered to the main component breadboard as explained earlier. Mount the audio jack (start gate) to the interface box case. Also mount the gate status LED to the case. Using the Breadboard Layout, identify where the eleven resistors will be mounted. Be sure to follow the diagram and watch carefully how the holes line up. They must match these holes in order to be in proper alignment with the copper bonding tabs underneath. Solder in all
resistors first. Now all the wires can be connected and soldered into place using these Schematic photos
Photo 1 and Photo 2 as an aid including those from the
DB-9 connector. Note: observe the correct DB-9 gender connector and run the wires through the slotted hole in the
case first! To keep in unison with these diagrams, keep the widest part of the connector (pins 1-5) at the top. Carefully observe all wire color coding from the DB9-1 and DB9-2 connectors and that you have established their correct placements. Note: The color coding in the photo has no relevance to the actual wiring diagrams.
The wires going to the buss bar can be connected at any location within the buss bar. Though not needed, I added two header pins. One on the negative buss and one on the positive buss bar. If troubleshooting is needed later, this is a convenient way to pick up your 5 volts of power. A little extra time here can save you hours later if wired incorrectly. Check and double check your work! When you are convinced that everything is correctly soldered, mount the breadboard to the standoffs and mount the DB9-1 and DB9-2 connectors. Be careful not to put strain on the connector pins or the breadboard wires, but mold the excess wires in a circular fashion. Note that some photos may not totally match the diagrams. Always use the diagrams versus photos for referencing.
