add calculation and footprint

FT24-SLS/FT24-SLS.kicad_sch

@@ -5139,6 +5139,10 @@
 		(at 250.19 120.65)
 		(uuid "011e21b3-b88d-48a0-9d5e-c901bd666664")
 	)
+	(no_connect
+		(at 60.96 204.47)
+		(uuid "1d9212b5-a85d-44ed-bad2-b221c3fae11e")
+	)
 	(no_connect
 		(at 250.19 118.11)
 		(uuid "24e50199-5690-40d1-b7b1-649b837d6d9d")
@@ -7723,6 +7727,17 @@
 		)
 		(uuid "30c0cb46-f409-4550-a39b-d021f5c47da4")
 	)
+	(text "gauge factor (GF) = 2.12 -- ΔL/L * GF = ΔR/R\n\nCarl: \"1mm Dehnung wird schon viel\"\nPush rod length: F:390, B:310mm\n1/310 * 2.12 = ΔR / 120\nΔR= 0.820 Ohm\nwe take simply 1 Ohm for ease of calculation\n\n3.3V /(3.3V*120/240 − 3.3V*120/241)= 482\nGain used: 500"
+		(exclude_from_sim no)
+		(at 9.906 211.582 0)
+		(effects
+			(font
+				(size 1.27 1.27)
+			)
+			(justify left)
+		)
+		(uuid "34dc485f-6fd1-4237-8b50-a5ec827bbcb4")
+	)
 	(text "STM32"
 		(exclude_from_sim no)
 		(at 180.848 65.278 0)
@@ -12460,7 +12475,7 @@
 				)
 			)
 		)
-		(property "Footprint" ""
+		(property "Footprint" "Diode_SMD:D_SOD-523"
 			(at 50.8 24.13 0)
 			(effects
 				(font
@@ -14380,7 +14395,7 @@
 				(justify left)
 			)
 		)
-		(property "Footprint" ""
+		(property "Footprint" "Diode_SMD:D_SOD-523"
 			(at 20.32 33.02 0)
 			(effects
 				(font