Previous image Up to current index page (1) Next image Stick the DC-to-DC buck converter on top of the Arduino, being careful not to obstruct any of the signal holes, and also avoiding the (red) reset switch area. This is what it looks like once all stacked together with 3M mounting tape. Solder the small "mode switch" to this side of the RJ45 jack. This step could be done even earlier if desired. Use flux, and try not to overheat it to the point where the switch innards melt! I run my soldering iron at 330C for most things. Now begin to wire the ethernet module to the Arduino. Begin with a solid wire straight down from Arduino Pin-10 to the SCS (or CS) chip-select signal of the ethernet module. This will also act as a support post, making the assembly much stiffer and more rigid.Then begin to add the extra signal wires, starting with the orange one shown here. It is easiest to complete that entire first row of five holes on the ethernet module before attaching wires to the second, outer row of five holes. Finish adding all of the signal wires to the ethernet module, and then also run power to it and the Arduino from the Buck converter. Here, RED is the Buck output, and BLACK is GND.The mode switch also gets wired now, by soldering the bottom pin to the side of the RJ45 or to any other convenient GND point. The middle wire is connected (GREEN) to Arduino Pin-8.I have added a bit more translucent electrical tape between the switch and the RJ45 jack after doing this, to prevent future accidental shorts there. Another view of the fully wired ethernet/Arduino combination. Note that I used thicker wire than necessary for some of the power connections. The skinny stuff would have been fine everywhere. Top view of the ethernet connections. Bottom view, showing the INT and NC pads with no wires attached -- those don't get used in this project. Also notice how all of the protruding pointy bits have been snipped flush on everything on the underside. This way they won't stick through the heat-shrink tubing when it gets added in the final step (much later). Overview of everything accomplished thus far. At this point, the module is ready for early testing, if desired. Connect +9V or +12V to the Buck converter -- you may have to temporarily solder wires on to accomplish this. When powered, several RED LEDs should light up immediately. If not, then disconnect the power and search for wiring errors on the RED and BLACK wires. To test it further, power it off, ensure the "mode switch" is in the UP ("off") position, and Connect an ethernet cable between the module and a computer, and then power it back on again. If all is working, the computer should "connect" to this "new network" and be assigned an IP Address of 1.2.3.5. If not, then something is not wired correctly.
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Now begin to wire the ethernet module to the Arduino. Begin with a solid wire straight down from Arduino Pin-10 to the SCS (or CS) chip-select signal of the ethernet module. This will also act as a support post, making the assembly much stiffer and more rigid.

Then begin to add the extra signal wires, starting with the orange one shown here. It is easiest to complete that entire first row of five holes on the ethernet module before attaching wires to the second, outer row of five holes.

Now begin to wire the ethernet module to the Arduino. Begin with a solid wire straight down from Arduino Pin-10 to the SCS (or CS) chip-select signal of the ethernet module. This will also act as a support post, making the assembly much stiffer and more rigid.Then begin to add the extra signal wires, starting with the orange one shown here. It is easiest to complete that entire first row of five holes on the ethernet module before attaching wires to the second, outer row of five holes. (z040104802)
z040104802 (13/31): OnePlus-LE2125 ISO160 1/120 f2.2 3.5mm 2022-02-04 10:48
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