add perliminary part list to readme

README.md

@@ -7,9 +7,24 @@ Uses a 3D printed housing to hold an Arduino, an OLED, batteries and two photose
 
 Take the STL files from the 'hardware' directory or modify the included OpenSCAD design and create your own custom STLs.
 
-Required Materials:
-
-TODO
+### Required Parts
+
+| Description        | Type          | Count  |
+| ------------------ | ------------- | ------ |
+| Arduino Nano       |               | 1x     |
+| LCD 128x64 I2C     | SSD1306 0.96" | 1x     |
+| Slide Switch       |               | 1x     |
+| IR Phototransistor | SFH 309 FA-5  | 2x     |
+| IR LED 3mm         |               | 2x     |
+| Resistor           | **TODO**      | 2x     |
+| Resistor           | **TODO**      | 1x     |
+| Screw              | M2 10mm       | 4x     |
+| Screw              | M2.5 10mm     | 2x     |
+| Screw              | M3 10mm       | 4x     |
+| Heatmelt Insert    | M3 8mm        | 4x     |
+| AAA Battery        |               | 3x     |
+| Bat. Terminal Neg. |               | 3x     |
+| Bat. Terminal Pos. |               | 3x     |
 
 ## Software