doc: basic readme info

README.md

-# MechRaptor-Controller
+# MechaRaptor controller
 
-Controller for the MechaRaptor tandem wing flapping system.
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+The MechaRaptor is a tandem flapping wing system built at the University of
+Liège during my Ph.D. thesis. The goal of this model is to conduct experimental
+analysis of the aerodynamics of tandem flapping wings.
+
+The system is activated by two sets of Brushless DC motors (BLDC), powered by an
+Engine Speed Controller (ESC), itself controlled through an Arduino Uno.
+
+This repository contains the Arduino code and mounting schematics.
+
+## Controller features
+
+- To be determined
+
+## Material
+
+The system consists in two independent sets of wings, powered separately. A
+single Arduino board is used to control both motors.
+
+- **BLDC**: [Plettenberg][plettenberg] Advance 30 (Discontinued by manufacturer)
+- **ESC**: TBD
+- **Controller**: Arduino Uno
+- **Others**: Potentiometers, Switches
+
+## Schematics
+
+[plettenberg]: https://plettenbergmotors.com/