add initial prototype

Hardware/ACAL.kicad_sch

@@ -0,0 +1,19 @@
+(kicad_sch
+	(version 20231120)
+	(generator "eeschema")
+	(generator_version "8.0")
+	(uuid "dbf20943-f262-400c-98f9-60f2a7b23a8c")
+	(paper "A4")
+	(lib_symbols)
+	(text "Goal of this block is sourcing 1V differential and using that as a baseline for the INL of the system.\nAfter the mathemathical sum is acquired of the 1V compensate 2V and up to agree with the summation of 1V.\nThis way INL can be corrected down every n values. The INL and stability of the IA is critical.\n\nNote 1V can also be a different fixed value."
+		(exclude_from_sim no)
+		(at 177.8 176.53 0)
+		(effects
+			(font
+				(size 1.2 1.2)
+			)
+			(justify left bottom)
+		)
+		(uuid "4db1af30-4d2a-4cfc-9808-9916ed54a8da")
+	)
+)