Step 1: The Schematic
Although mine isn't exactly like that one it is essentially the same topography. It sure looks simple enough doesn't it? That is why I choose to build it myself. I made my schematic because I did not have a TLE2141C Op-Amp. If you do then you can build the original and it should be easier than building mine.
IC1 and IC2 on my schematic are 15 volt regulators I used 12 volt ones. SL4 from the power supply section should power the lower voltage dual op-amp of course.
Step 2: Board
I've made so many of these I'm not really so sure which is what anymore. I know I cleaned the schematic up a little before I uploaded a screen capture of it for the previous step. I'll be honest, often when I am doing an electronics project I just want something to work so I don't spend as much time as I should making my schematics as neat as I could before I move on to the next step.
Just so long as everything is hooked up you know? Sometimes I find while I am routing a board that some things aren't connected to each other too! Then I have to go back and fix that.
Anyhow the one I am including here looks pretty good to me. If anyone finds any problems then let me know and I'll see what I can't do to fix it.