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README.md

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 # SaMcam_hw
 
-Simon's and Max' camera steering hardware for the Raspberry Pi. 
+![Rendering 0](https://git.stiefel.tech/m3x1m0m/SaMcam_hw/raw/branch/master/SaMcam_shield/output/SaMcam_shield.jpg)
+
+Simon's and Max' camera steering hardware for the Raspberry Pi.
+
+## Format
+This is a shield with 85 mm x 56 mm, that can simply be plugged onto the Raspberry Pi.
+
+## Interfaces
+* A 12 V battery can be connected through a barrel jack. Reverse-polarity protected. 
+* Blade fuse for circuitry protection.
+* Three JST XH connectors for 28BYJ-48 steppers (12 V version).
+* UART programming interface for ESP8266. 
+
+## License
+Cf. license file.