Add protection diode on speaker. Thanks Brian Allan

OpenFlops.sch

@@ -2243,27 +2243,27 @@ Wire Notes Line
 $Comp
 L Device:Speaker SPK1
 U 1 1 5D494B63
-P 5195 4100
-F 0 "SPK1" H 5365 4096 50  0000 L CNN
-F 1 "Speaker" H 5365 4005 50  0000 L CNN
-F 2 "" H 5195 3900 50  0001 C CNN
-F 3 "~" H 5185 4050 50  0001 C CNN
-	1    5195 4100
+P 5190 4015
+F 0 "SPK1" H 5360 4011 50  0000 L CNN
+F 1 "Speaker" H 5360 3920 50  0000 L CNN
+F 2 "" H 5190 3815 50  0001 C CNN
+F 3 "~" H 5180 3965 50  0001 C CNN
+	1    5190 4015
 	1    0    0    -1  
 $EndComp
 Wire Wire Line
-	4995 4100 4915 4100
+	4990 4015 4915 4015
 Wire Wire Line
-	4915 3685 4915 3635
+	4915 3550 4915 3500
 $Comp
 L power:+5V #PWR0137
 U 1 1 5D4C0625
-P 4915 3635
-F 0 "#PWR0137" H 4915 3485 50  0001 C CNN
-F 1 "+5V" H 4930 3808 50  0000 C CNN
-F 2 "" H 4915 3635 50  0001 C CNN
-F 3 "" H 4915 3635 50  0001 C CNN
-	1    4915 3635
+P 4915 3500
+F 0 "#PWR0137" H 4915 3350 50  0001 C CNN
+F 1 "+5V" H 4930 3673 50  0000 C CNN
+F 2 "" H 4915 3500 50  0001 C CNN
+F 3 "" H 4915 3500 50  0001 C CNN
+	1    4915 3500
 	1    0    0    -1  
 $EndComp
 $Comp
@@ -2278,9 +2278,9 @@ F 3 "https://www.fairchildsemi.com/datasheets/2N/2N3904.pdf" H 4815 4485 50  000
 	1    0    0    -1  
 $EndComp
 Wire Wire Line
-	4995 4200 4915 4200
+	4990 4115 4915 4115
 Wire Wire Line
-	4915 4200 4915 4285
+	4915 4115 4915 4265
 $Comp
 L power:GND #PWR0138
 U 1 1 5D4EFD9D
@@ -2535,14 +2535,39 @@ Wire Wire Line
 $Comp
 L Device:R R6
 U 1 1 5E2368C4
-P 4915 3835
-F 0 "R6" H 4905 3690 50  0000 R CNN
-F 1 "100" V 4910 3910 50  0000 R CNN
-F 2 "Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder" V 4845 3835 50  0001 C CNN
-F 3 "~" H 4915 3835 50  0001 C CNN
-	1    4915 3835
+P 4915 3700
+F 0 "R6" H 4905 3555 50  0000 R CNN
+F 1 "100" V 4910 3775 50  0000 R CNN
+F 2 "Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder" V 4845 3700 50  0001 C CNN
+F 3 "~" H 4915 3700 50  0001 C CNN
+	1    4915 3700
 	-1   0    0    1   
 $EndComp
 Wire Wire Line
-	4915 3985 4915 4100
+	4915 3850 4915 3890
+Wire Wire Line
+	4730 3925 4730 3890
+Wire Wire Line
+	4730 3890 4915 3890
+Connection ~ 4915 3890
+Wire Wire Line
+	4915 3890 4915 4015
+Wire Wire Line
+	4730 4225 4730 4265
+Wire Wire Line
+	4730 4265 4915 4265
+Connection ~ 4915 4265
+Wire Wire Line
+	4915 4265 4915 4285
+$Comp
+L Device:D D2
+U 1 1 5E2F4A52
+P 4730 4075
+F 0 "D2" V 4684 4154 50  0000 L CNN
+F 1 "1N5819 (?)" V 4775 4154 50  0000 L CNN
+F 2 "Diode_SMD:D_SOD-123" H 4730 4075 50  0001 C CNN
+F 3 "~" H 4730 4075 50  0001 C CNN
+	1    4730 4075
+	0    -1   1    0   
+$EndComp
 $EndSCHEMATC