From 3b35e1e45576834cf97cccb5a279651b9e56c237 Mon Sep 17 00:00:00 2001
From: Gustavo Alberto <83519205+gustavo-alberto@users.noreply.github.com>
Date: Tue, 7 Oct 2025 19:02:15 -0300
Subject: [PATCH] docs: create BOM md

---
 BOM.md | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 BOM.md

diff --git a/BOM.md b/BOM.md
new file mode 100644
index 0000000..0a88d8d
--- /dev/null
+++ b/BOM.md
@@ -0,0 +1,37 @@
+# Bill of Materials (BOM)
+
+## Mechanics
+| Name | Qty | Description | Comments | Suggested link |
+|------|-----|--------------|-----------|----------------|
+| Steel ball | 12 | Ø1.25 mm (0.05") | Precision G10 or better. Can be sourced from small ball bearings | |
+| PU stretch cord | 1 m | Ø1mm | e.g. "Stretch Magic" or "Magic String" | |
+| Neodym Cylinder Magnet | 70 | Ø3mm h=4 mm |  | |
+| Brass Pipe | 1 m | OD=Ø2mm ID=Ø1 mm |  | |
+| M2 Screw | 12 | M2×12 mm, Countersunk |  | |
+| M3 Grub Screw | 6 | M3×4 |  | |
+
+## Electronics
+| Name | Qty | Description | Comments | Suggested link |
+|------|-----|--------------|-----------|----------------|
+| DC-DC Step Down Module | 1 | 4.75–23 V Step-Down Buck Converter |  | |
+| (1N5819) OR (PMEG4010) | 1 | Diode (through-hole or SMD) |  | |
+| Raspberry Pi Pico 2 | 1 | Microcontroller board |  | |
+| MT6835 Magnetic Encoder Module | 3 | Magnetic encoder |  | |
+| TB6612FNG Driver | 3 | |  | |
+| 470 µF Electrolytic Capacitor | 3 | > 100 µF | anything > 100µF will work well | |
+| 10 µF Ceramic Capacitor 0603 | 3 | Optional |  | |
+| 4.7 k Resistor 0603 | 2 | Optional |  | |
+| 2 Pin Power Header | 1 | 7.5 mm pitch |  | |
+| 4 Pin Header | 4 | 2.5 mm pitch |  | |
+| 8 Pin Header | 1 | 2.0 mm pitch |  | |
+| NEMA 17 Stepper Motor | 3 | Body ≤ 38 mm | Body length <= 38mm | |
+
+## 3D Printing
+| Name | Qty | Description | Comments | Suggested link |
+|------|-----|--------------|-----------|----------------|
+| WireFlexureMount | 3 |  | 0.4 mm+ nozzle may require post-processing | |
+| RubberBandCollet | 3 |  | 0.4 mm+ nozzle may require post-processing | |
+| BallJointMount | 3 |  | 0.4 mm+ nozzle may require post-processing | |
+| Motor Mount | 3 |  |  | |
+| End Effector | 1 |  |  | |
+| Base Block | 1 |  |  | |