add psu_addon page

_pages/modules.md

@@ -73,6 +73,8 @@ Following the links below will take you to the module details. Pay attention to
     - Basic Eurorack PSU distribution board, with 12 IDC headers.
 -  :warning:  [USB distribution board](/usb_distrib/)
     - Double USB receptacle to power 5V usb devices out of your eurorack case.
+-  :warning:  [PSU-Addon](/psu_addon/)
+    - Stable +/-12V supply to be plugged after Meanwell RT series PSU    
 
 | Symbol | Description |
 | ----------- | ----------- |

_pages/psu_addon.md

@@ -0,0 +1,62 @@
+---
+permalink: /psu_addon/
+layout: single
+title: "PSU Addon"
+category: "PSU"
+toc: true
+toc_label: "ToC"
+toc_icon: "cog"
+header:
+  overlay_color: "#5e616c"
+  overlay_image: /assets/images/PSU-addon-top.png
+---
+
+![PSU Addon](/assets/images/PSU-addon-top.png)
+
+:warning: **WIP WIP WIP WIP WIP** :warning: 
+
+PSU Addon to create a stable +/-12V voltage for your case. 
+Input can be up to 35V **DC**.
+
+This is designed to be used (in my case) with a Meanwell RT65C. Input in my case will be +/-15V. But it can be used with any DC power supply, as long as you have +/-2V above +/-12V on the input.
+
+This PSU-addon will provide a maximum of 1A on each rails ** But check the specs of the PSU you have on the input to make sure that it'll be sufficient. 
+
+The input capacitor is oversized because I had those lying around. But you could use anything a bit smaller. Check the voltage regulators datasheet if you want to make sure. 
+
+## Schematics
+
+![PSU Addon schematic](/assets/images/PSU-addon--Schematic.svg)
+
+## BoM
+
+[See bom](/assets/bom/PSU-addon_V1.1--iBoM.html)
+
+You can donwload the bom in excel format [here](https://github.com/BleepSound/PSU-addon/releases/download/v1.1/PSU-addon_V1.1--BoM.xlsx)
+
+
+## Build Informations
+
+Put heatsink elements on the voltage regulators, as they will get really hot during use. 
+
+:warning: When building modules, always do it in this order (from smallest component to highest):
+- diodes
+- resistors
+- Electrolytic capacitors (small ones)
+- Terminal blocks connectors
+- Voltage regulators
+- Oversized electrolytic capacitors
+
+## Images
+
+![3D PSU Addon(front)](/assets/images/PSU-addon-3D_top.png)
+
+![3D PSU Addon(back)](/assets/images/PSU-addon-3D_bottom.png)
+
+![3D PSU Addon(iso)](/assets/images/PSU-addon-3D_top30deg.png)
+
+## Download
+
+Follow this link if you want to dowload the latest version of gerber files, schematic, kicad files...
+
+:arrow_down: [**Download**](https://github.com/BleepSound/PSU-addon/releases)