Let me start by stating that I don’t consider myself electrically inept.\u00a0 In fact, I have formal training in the electronics field.\u00a0 But sometimes you can let a project get the best of you.<\/p>\n
Let me back up a bit.\u00a0 The Louisiana Central will have four staging areas.\u00a0 On the west end of the layout, there will be a hidden staging track for an Illinois Central train and another for a Texas and Pacific train.\u00a0 Over on the east side, there will be four staging tracks, two for the Illinois Central and two for the Louisiana Central.\u00a0 Since the tracks will be hidden from normal viewing angles, I decided to install an optical detection system which will light up LED indicators on panels showing when a train is nearing the end of a track, and also the clearance point at the entrance to the track.\u00a0 Simple enough.\u00a0 In researching the task, I found a fellow up in Canada who offers nice, tidy, little circuit boards that will fill the bill perfectly.\u00a0 All one has to do is install the phototransistors (hereinafter referred to as P.T.s), the infrared LED light sources, and the LED panel indicators.\u00a0 Bring all the wiring from these devices to the little circuit boards, hook up a wall-wart power supply, and you’re done.<\/p>\n
I have procrastinated for months starting this installation.\u00a0 It wasn’t because I was intimidated by the wiring, rather it was because I just didn’t feel up to the tedium of the task…running all the wire, making the hundreds of wiring connections, fabricating mounting brackets for the devices, making the panels, etc.\u00a0 The time to do the task is while the staging track is visible and easily accessible.\u00a0 I don’t want to install any sub-road in front of the staging until that is complete.\u00a0 Well, that time has come.\u00a0 Further progress cannot be made at Monterey (the west end of the line) or to the LC mainline, or the Spencer logging operation between Whitcomb and Maynard until this work is done.\u00a0 So I resolved myself to installing the system at Monterey this past weekend.<\/p>\n
Things started out well enough.\u00a0 I bored holes at the appropriate locations in the track to receive the P.T.s.\u00a0 They slipped right in and held firm just by the friction in the hole…great!\u00a0 I planned to use a recycled 25 pair telephone cable (donated by a friend), so I unrolled the cable and stretched it out along the top of the joists adjacent to the staging tracks.\u00a0 The only way I could think of to splice into the cable at various points was to go ahead and pull open the outer jacket for much of the length of the cable, a task made easy by the little ripping string provided within the cable bundle.\u00a0 I figured I would wrap electrical tape around the cable every 8 inches or so to keep things together.\u00a0 So far, so good.<\/p>\n
This is where things started going south.\u00a0 I decided to use the black\/white striped wire along with the white\/black striped wire in parallel as the common negative wire (using two wires for less resistance and for a margin of “backup safety”).\u00a0 I selected those and one other cable and soldered them to the pigtail leads from the first P.T.\u00a0 To insulate the joint I had planned to use small wire nuts which I thought were made for this light gauge wire.\u00a0 They didn’t work…wouldn’t bite onto the wire.\u00a0 So I pulled out my Scotch 33+ electrical tape and proceeded to wrap it around the wire nut and wire to hold it all together.\u00a0 After using what seemed like a yard of tape, I had the joint secure and insulated.\u00a0 It looked like something from a Chevy Chase movie.\u00a0 I did the next couple P.T.s like this and finally decided that this was ridiculous.\u00a0 So I went searching and found an old stash of heat shrink tubing.\u00a0 I clipped off an inch, slipped it on my next joint and shrunk it down.\u00a0 Finally, a decent looking insulated joint!<\/p>\n
As I progressed, I found that removing about a foot of the outer jacket at the spot where I wanted to make a connection, then forming a loop in the cable, allowed me to easily grab a wire, clip it and solder it to the P.T. pigtail.\u00a0 When I got to the 7th P.T. down, I noticed my next mistake.\u00a0 Despite writing all the wire colors down as I used them, out of the 50 wires available to me, I had managed to use the same color twice for two P.T.s.\u00a0 Rats!\u00a0 Since I had severed the twice used cable at the 7th connection, I had to go back to the 1st (where the color had initially been used) and select another wire to re-do that connection.\u00a0 Plus, the pigtail was now a tad too short, so I had to make an extension for it to reach the bundle.<\/p>\n
OK, now I have all the P.T.s connected and I have to anchor the cable down.\u00a0 I performed that task without incident.\u00a0 But the joy wasn’t to last long.\u00a0 As I began inserting the P.T.s into their respective holes, when I got down to number 7, I found that the leads weren’t near long enough for it to reach it’s hole.\u00a0 While connecting the P.T.s the entire cable had shifted on me without my knowledge since I hadn’t anchored it at the beginning.\u00a0 Arrghhh!\u00a0 About then, two other realizations hit me.\u00a0 One, I had attached the cable to the top of the joists.\u00a0 But now I realized that once the sub-roadbed for the Monterey yard was installed, those cable mounts would be forever inaccessible.\u00a0 This means that the cable would automatically be in the way of every<\/em> future thing that would have to be done under the layout and there would be no way to move it.\u00a0 Realization number two: I had forgotten to run the cable to the indicator panel location.\u00a0 Aw, geez!\u00a0 I put the tools down, killed the lights and retired to the house for the night.<\/p>\n Sunday morning I mulled over the entire fiasco while consuming a couple cups of coffee.\u00a0 I analyzed all that had gone wrong, what was needed to correct the mistakes and what course of action I should take.\u00a0 I finally decided that the only reasonable thing to do to fix everything was to simply tear out what I had done and start over from scratch.\u00a0 Painful, yes.\u00a0 But not nearly as painful as the potential headaches I would face later if I simply tried to patch what I’d already done.\u00a0 So armed with the knowledge gained, and a renewed hope of success, I headed back out there later that afternoon (after watching the sweet Saints victory over the Texans).<\/p>\n I started where I should have in the beginning…at the indicator panel, then routed the cable over to the back by the staging tracks.\u00a0 This time I routed the cable below the joists and supported it by the hangers (simple EMT conduit clamps) screwed to the bottom of each joist (screwed<\/em> is key to easy shifting or removal of the clamp later if need be).\u00a0 I taped the opened outer jack at each hanger and also between hangers and that has worked nicely to keep things orderly.\u00a0 I stopped when I reached the first P.T. location; this is where I’ll pick-up at the next work session.\u00a0 I plan to attach new longer leads to the P.T.s and simply coil the excess length so I have it if I need it later.\u00a0 The loops I make in the cable will be directly at joists so they may be supported properly rather than drooping down between the joists as they were initially.\u00a0 And the cable will be anchored as I go so it will stay in place.<\/p>\n I feel much more confident in this latest approach, as I’m trying to think this through much more thoroughly and apply what I’ve learned from the mistakes I’ve already made.<\/p>\n But just in case, wish me luck!<\/strong><\/p>\n -Jack<\/em><\/p>\n","protected":false},"excerpt":{"rendered":" Let me start by stating that I don’t consider myself electrically inept.\u00a0 In fact, I have formal training in the electronics field.\u00a0 But sometimes you can let a project get the best of you. Let me back up a bit.\u00a0 … Continue reading