Add: README.org with basic specs and features

README.org

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+#+TITLE: S-151 Master Clock
+* Specs
+
+Target Size: 8HP
+
+** Core Features
+  - programmable clock mult/div
+  - tap tempo
+  - bpm select
+  - start stop
+  - CV Inputs:
+    - Clock
+    - start/stop
+  - CV Ooutputs
+    - 4x programable clock out
+    - reset
+** Advanced (desired) Features:
+  - storage for presets
+  - pulse width control
+