Start putting down requirements and part candidates

design.org

+* Parts
+
+** IMU
+
+*** LSM9DS1 ~6€ -- 3D accelerometer, 3D gyroscope, 3D magnetometer
+
+
+   http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00103319.pdf
+
+*** LSM9DS0 ~6-8€
+ smaller package than LSM9DS1 -> more expensive? can't see any other difference
+
+
+*** FXOS8700CQ <2€ -- 6-Axis Sensor with Integrated Linear Accelerometer and Magnetometer
+
+    http://cache.freescale.com/files/sensors/doc/data_sheet/FXOS8700CQ.pd
+
+** µC
+
+- Requirements
+
+  5x analog range sensors
+  2x PWM motors outputs (4? H-Bridge)
+  2x hal sensor inputs + timer (motor speed)
+
+  1x UART main COM to master control
+    or
+  1x USB device main COM
+
+  1x UART/SPI/TWI to (optional) CHIP board
+  1x DAC for servo
+
+
+*** STM32F042K4 ~2.5€ -- Cortex-M0, 16K Flash, 48 MHz, USB FS
+
+    LQPF seems not to be in stock anywhere
+
+    UFQFN might be hard to solder but since we're going to reflow the board it
+    might not be a proble
+
+    http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00105814.pdf
+
+
+*** STM32F030F4 ~1€ -- Cortex-M0, 16K Flash, 48 MHz
+
+    - Plenty of stock
+    - No USB
+    - 20-Pin TSSOP really easy to solder
+
+
+    http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00088500.pdf
+
+*** STM32F070F6 ~1.5€ -- Cortex-M0, 32K Flash, 48 MHz, USB FS
+
+    - Not much stock
+
+    http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00141386.pdf
+
+*** Atmel SAM series
+
+     - looks too expensive, couldn't find any for <5€