Created 2. Electronics assembly (markdown)

2.-Electronics-assembly.md

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+**TODO PIX completed PCB assembly**
+
+## Step 1: Get the necessary tools
+**TODO PIX all tools necessary**
+- Base PCB with all components soldered
+- Vertical PCB with all components soldered
+- A soldering iron
+- Solder
+
+**If you don't have a base and vertical PCB, see `Appendix A: Printed Circuit Boards` for information on how to get them.**
+
+## Step 2: 3D-printed parts
+**TODO PIX all 3D-printed parts**
+- PCB anchor
+- PCB assembly jig
+
+**If you don't have these 3D-printed parts, see `Appendix B: 3D-Printed Parts` for information on how to get them.**
+
+## Step 3: Attach the PCB anchor to the base PCB
+**TODO PIX pcb anchor into base**
+Alignment is not crucial here; in later steps, the PCB assembly jig will be used to ensure alignment.
+
+## Step 4: Attach the vertical PCB to the PCB anchor
+**TODO PIX putting vertical PCB into PCB anchor**
+Again, alignment is not crucial here.
+
+## Step 5: Put the PCBs into the PCB assembly jig
+**TODO PIX putting base PCB into assembly jig**
+Make sure that the PCBs are seated fully and completely in the assembly jig, as alignment is crucial.
+
+## Step 6: Solder pads from the two PCBs together
+**TODO PIX solder being applied to shared pads**
+- Set the soldering iron's temperature to higher than normal, as the pads are large and shed heat quickly
+- Apply generous amounts of solder to ensure a good connection and good mechanical strength
+
+## Step 7: All done!
+**TODO PIX completed PCB assembly**
+
+Congrats, you finished assembling the electronics! Pat yourself on the back.
+
+When you're ready, proceed to `3. Enclosure Assembly` to continue.