Updated the citation to refer to the proper chipset.

Author: dplassgit

keyboardv1/README.md

@@ -1,12 +1,11 @@
 # Keyboard v1
 
-An Arduino sketch to retrieve serial binary from the Vector Graph 4 keyboard.
+An Arduino sketch to retrieve serial binary from the Vector Graphic 4 keyboard.
 
 After an active-low trigger, the first bit is skipped, then
 subsequent bits are shifted in LSB to MSB, for 7 bits.
 
 Then, a simple lookup is used to translate to the key to send via USB.
 
-This version must be run on an Arduino that [CITATION NEEDED] can send back 
-USB commands as keyboard commands.
-
+This version must be run on an Arduino with the ATmega32U4 chip (e.g., ProMicro,
+Leonardo) that can act as a HID (human input device), i.e., a USB keyboard.