Correct TSNP name, adjust crystal capacitors, and add an audio sensor.

hardware/ctrl-stmicro.sch

@@ -719,7 +719,7 @@ Text Label 6100 2600 0    50   ~ 0
 T_DIO
 Text Label 3400 1500 2    50   ~ 0
 T_SWD
-Text Label 6200 3200 0    50   ~ 0
+Text Label 6000 3150 0    50   ~ 0
 T_TDI
 Wire Wire Line
 	6000 2800 6100 2800
@@ -742,12 +742,10 @@ F 3 "https://www.st.com/resource/datasheet/stm32wle5jc.pdf" V 4850 2600 39  0001
 	1    4800 2600
 	1    0    0    -1  
 $EndComp
-NoConn ~ 3500 1600
 Wire Wire Line
 	3500 1600 3600 1600
-NoConn ~ 3500 1700
 Wire Wire Line
-	3500 1700 3600 1700
+	2300 1700 3600 1700
 NoConn ~ 3500 2000
 Wire Wire Line
 	3500 2000 3600 2000
@@ -806,12 +804,12 @@ Wire Wire Line
 Wire Wire Line
 	8500 2000 7900 2000
 Connection ~ 7900 2000
-Text Notes 7650 2900 0    50   ~ 0
+Text Notes 7750 2900 0    50   ~ 0
 Analogue sensor\ncircuit for use by\nhigher education
 Wire Notes Line
-	7600 2950 8350 2950
+	7700 2950 8450 2950
 Wire Notes Line
-	8350 2950 8350 2625
+	8450 2950 8450 2625
 Wire Notes Line
 	5950 7050 6050 7150
 Wire Notes Line
@@ -930,7 +928,7 @@ L Device:C_Small C76
 U 1 1 603459B1
 P 2700 3900
 F 0 "C76" V 2850 4025 50  0000 R CNN
-F 1 "5,1pF" V 2775 4150 50  0000 R CNN
+F 1 "7pF" V 2775 4150 50  0000 R CNN
 F 2 "Capacitor_SMD:C_0805_2012Metric" H 2700 3900 50  0001 C CNN
 F 3 "~" H 2700 3900 50  0001 C CNN
 	1    2700 3900
@@ -941,7 +939,7 @@ L Device:C_Small C77
 U 1 1 6034D3D2
 P 2700 4200
 F 0 "C77" V 2625 4350 50  0000 R CNN
-F 1 "5,1pF" V 2550 4475 50  0000 R CNN
+F 1 "7pF" V 2550 4475 50  0000 R CNN
 F 2 "Capacitor_SMD:C_0805_2012Metric" H 2700 4200 50  0001 C CNN
 F 3 "~" H 2700 4200 50  0001 C CNN
 	1    2700 4200
@@ -1148,7 +1146,6 @@ F 0 "C74" V 1925 3250 50  0000 R CNN
 F 1 "6,8pF" V 1850 3250 50  0000 R CNN
 F 2 "Capacitor_SMD:C_0805_2012Metric" H 1800 3300 50  0001 C CNN
 F 3 "~" H 1800 3300 50  0001 C CNN
-F 4 "DNP" V 1750 3250 50  0000 R CNN "Placement"
 	1    1800 3300
 	0    -1   -1   0   
 $EndComp
@@ -1160,7 +1157,6 @@ F 0 "C75" V 1725 3550 50  0000 R CNN
 F 1 "6,8pF" V 1650 3550 50  0000 R CNN
 F 2 "Capacitor_SMD:C_0805_2012Metric" H 1800 3600 50  0001 C CNN
 F 3 "~" H 1800 3600 50  0001 C CNN
-F 4 "DNP" V 1561 3550 50  0000 R CNN "Placement"
 	1    1800 3600
 	0    -1   -1   0   
 $EndComp
@@ -1463,9 +1459,9 @@ Wire Notes Line
 Wire Notes Line
 	6500 2600 7250 2600
 Wire Notes Line
-	7600 2950 7600 2625
+	7700 2950 7700 2625
 Wire Notes Line
-	7600 2625 8350 2625
+	7700 2625 8450 2625
 Text Notes 9100 3650 0    50   ~ 0
 Transceiver frequency balancing circuit,\nimportant to resonate at a given RF band
 Wire Notes Line
@@ -1588,8 +1584,8 @@ Text Label 6100 2400 0    50   ~ 0
 V_NTC
 Text Label 6100 2100 0    50   ~ 0
 V_ALS
-NoConn ~ 6200 3200
-Text Notes 6400 3200 0    50   ~ 0
+NoConn ~ 6000 3150
+Text Notes 6200 3150 0    50   ~ 0
 -DNC
 Text HLabel 6100 2800 2    50   BiDi ~ 0
 SNSD
@@ -1614,4 +1610,75 @@ Wire Wire Line
 Connection ~ 9150 4550
 Wire Wire Line
 	9150 4550 9450 4550
+$Comp
+L Elabdev:CMM-2718AB-383161 MIC1
+U 1 1 5F9D1A0D
+P 1800 1300
+F 0 "MIC1" H 1650 1550 50  0000 R CNN
+F 1 "CMM-2718AB-383161" H 2700 1550 50  0000 R CNN
+F 2 "Elabdev:CMM-2718AB-383161" H 900 950 50  0001 L CIN
+F 3 "https://www.cui.com/product/resource/cmm-2718ab-383161-tr.pdf" H 1800 1300 50  0001 C CNN
+	1    1800 1300
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:C C93
+U 1 1 5F9EFBBD
+P 2300 1450
+F 0 "C93" H 2415 1541 50  0000 L CNN
+F 1 "10uF" H 2415 1450 50  0000 L CNN
+F 2 "Capacitor_SMD:C_0805_2012Metric" H 2338 1300 50  0001 C CNN
+F 3 "~" H 2300 1450 50  0001 C CNN
+F 4 "Maybe-DNP" H 2415 1359 50  0000 L CNN "Placement"
+	1    2300 1450
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	2200 1300 2300 1300
+Wire Wire Line
+	1800 1600 1400 1600
+Wire Wire Line
+	1400 1600 1400 1450
+$Comp
+L Device:C C92
+U 1 1 5FA0A493
+P 1400 1300
+F 0 "C92" H 1300 1346 50  0000 R CNN
+F 1 "0,1uF" H 1300 1255 50  0000 R CNN
+F 2 "Capacitor_SMD:C_0805_2012Metric" H 1438 1150 50  0001 C CNN
+F 3 "~" H 1400 1300 50  0001 C CNN
+	1    1400 1300
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	1400 1150 1400 1000
+Wire Wire Line
+	1400 1000 1800 1000
+NoConn ~ 3500 1600
+Wire Wire Line
+	2300 1600 2300 1700
+$Comp
+L power:GND #PWR039
+U 1 1 5FA5F62A
+P 1400 1600
+F 0 "#PWR039" H 1400 1350 50  0001 C CNN
+F 1 "GND" H 1405 1427 50  0000 C CNN
+F 2 "" H 1400 1600 50  0001 C CNN
+F 3 "" H 1400 1600 50  0001 C CNN
+	1    1400 1600
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:+3V3 #PWR038
+U 1 1 5FA6096D
+P 1400 1000
+F 0 "#PWR038" H 1400 850 50  0001 C CNN
+F 1 "+3V3" H 1415 1173 50  0000 C CNN
+F 2 "" H 1400 1000 50  0001 C CNN
+F 3 "" H 1400 1000 50  0001 C CNN
+	1    1400 1000
+	1    0    0    -1  
+$EndComp
+Connection ~ 1400 1000
+Connection ~ 1400 1600
 $EndSCHEMATC