Added receiver assembly instructions

redox-w/README.md

@@ -104,6 +104,35 @@ Assembly steps:
 <img src="../img/pcb-w-assembly1.jpg" alt="Wireless Redox assembled PCB" width="600"/>
 </p>
 
+#### Receiver Assembly
+
+The assembly is streightforward, I suggest you to follow the following order:
+
+1. Solder all the Mitosis receiver components on the PCB. Leave the programming header for last.
+2. Solder the Arduino Pro Micro to the Mitosis receiver PCB.
+
+> :warning: Notice the orientation of the RGB LED (Cree CLVBA-FKA). Here I highlighted the dot on the PCB which must match with the notch on the LED packaging.
+
+<p align="center">
+<img src="../img/redox-w-assembly-1.jpg" alt="Mitosis receiver PCB LED installation detail." width="300"/>
+<img src="../img/redox-w-assembly-2.jpg" alt="RGB LED detail" width="300"/>
+</p>
+
+##### Assembled receiver PCB:
+
+<p align="center">
+<img src="../img/redox-w-assembly-3.jpg" alt="Receiver PCB assembly front." width="300"/>
+<img src="../img/redox-w-assembly-4.jpg" alt="Receiver PCB assembly back." width="300"/>
+</p>
+
+*Note*: You might notice that I didn't soldered the second push button, this is because it's not used in the receiver firmware.
+
+##### Assembled receiver:
+
+<p align="center">
+<img src="../img/redox-w-assembly-5.jpg" alt="Receiver PCB assembly front." width="600"/>
+</p>
+
 #### Firmware
 
 This keyboard uses two types of MCUs so it needs two different firmwares. For flashing the firmware use the following order: