Add submission # 6513

#6513

Author: ArduinoBot

registry.txt

@@ -8262,3 +8262,4 @@ https://github.com/mcmchris/mcm-atm90e32-lib.git|Contributed|MCM_ATM90E32
 https://github.com/lukdog/BleValueSync.git|Contributed|BleValueSync
 https://github.com/GyverLibs/RGBLED.git|Contributed|RGBLED
 https://github.com/mikeedudee/MS5611-Mike-Refactored.git|Contributed|MS5611 Library Mike Refactored
+https://github.com/TheBlackSwitch/PS2Keyboard.git|Contributed|PS2KEyboard