AcornElectronMainboard

sound.sch

18:f1d60a768fbd
2022-07-05 Paul Boddie Added decoupling capacitors for RAM chips and tidied the layout somewhat.
     1 EESchema Schematic File Version 4     2 LIBS:AcornElectronMainboard-cache     3 EELAYER 26 0     4 EELAYER END     5 $Descr A4 11693 8268     6 encoding utf-8     7 Sheet 5 9     8 Title ""     9 Date ""    10 Rev ""    11 Comp ""    12 Comment1 ""    13 Comment2 ""    14 Comment3 ""    15 Comment4 ""    16 $EndDescr    17 $Comp    18 L Device:R R?    19 U 1 1 61EC8808    20 P 1600 2350    21 AR Path="/61EC8808" Ref="R?"  Part="1"     22 AR Path="/61E9B87F/61EC8808" Ref="R63"  Part="1"     23 F 0 "R63" H 1670 2396 50  0000 L CNN    24 F 1 "1000R" H 1670 2305 50  0000 L CNN    25 F 2 "" V 1530 2350 50  0001 C CNN    26 F 3 "~" H 1600 2350 50  0001 C CNN    27 	1    1600 2350    28 	1    0    0    -1      29 $EndComp    30 Wire Wire Line    31 	1400 2600 1600 2600    32 Wire Wire Line    33 	1600 2600 1600 2500    34 $Comp    35 L bc213:BC213 Q?    36 U 1 1 61EC8848    37 P 3300 2900    38 AR Path="/61EC8848" Ref="Q?"  Part="1"     39 AR Path="/61E9B87F/61EC8848" Ref="Q4"  Part="1"     40 F 0 "Q4" H 3491 2946 50  0000 L CNN    41 F 1 "BC213" H 3491 2855 50  0000 L CNN    42 F 2 "Package_TO_SOT_THT:TO-92_Inline" H 3500 2825 50  0001 L CIN    43 F 3 "https://www.futurlec.com/Transistors/BC213L.shtml" H 3300 2900 50  0001 L CNN    44 	1    3300 2900    45 	1    0    0    1       46 $EndComp    47 $Comp    48 L bc183:BC183 Q?    49 U 1 1 61EC884F    50 P 3300 2300    51 AR Path="/61EC884F" Ref="Q?"  Part="1"     52 AR Path="/61E9B87F/61EC884F" Ref="Q3"  Part="1"     53 F 0 "Q3" H 3491 2346 50  0000 L CNN    54 F 1 "BC183" H 3491 2255 50  0000 L CNN    55 F 2 "Package_TO_SOT_THT:TO-92_Inline" H 3500 2225 50  0001 L CIN    56 F 3 "https://www.futurlec.com/Transistors/BC182L.shtml" H 3300 2300 50  0001 L CNN    57 	1    3300 2300    58 	1    0    0    -1      59 $EndComp    60 $Comp    61 L Device:R R?    62 U 1 1 61EC8856    63 P 4750 2600    64 AR Path="/61EC8856" Ref="R?"  Part="1"     65 AR Path="/61E9B87F/61EC8856" Ref="R61"  Part="1"     66 F 0 "R61" V 4650 2600 50  0000 C CNN    67 F 1 "47R" V 4850 2600 50  0000 C CNN    68 F 2 "" V 4680 2600 50  0001 C CNN    69 F 3 "~" H 4750 2600 50  0001 C CNN    70 	1    4750 2600    71 	0    1    1    0       72 $EndComp    73 Wire Wire Line    74 	3400 2700 3400 2600    75 Wire Wire Line    76 	3400 2600 4600 2600    77 Connection ~ 3400 2600    78 Wire Wire Line    79 	3100 2300 3000 2300    80 Wire Wire Line    81 	3000 2300 3000 2600    82 Wire Wire Line    83 	3000 2900 3100 2900    84 Wire Wire Line    85 	1600 2600 3000 2600    86 Connection ~ 1600 2600    87 Connection ~ 3000 2600    88 Wire Wire Line    89 	3000 2600 3000 2900    90 Wire Wire Line    91 	3400 2600 3400 2500    92 $Comp    93 L Device:CP C?    94 U 1 1 61EC8868    95 P 4050 2400    96 AR Path="/61EC8868" Ref="C?"  Part="1"     97 AR Path="/61E9B87F/61EC8868" Ref="C25"  Part="1"     98 F 0 "C25" V 4300 2400 50  0000 C CNN    99 F 1 "22??F/16V" V 4200 2400 38  0000 C CNN   100 F 2 "" H 4088 2250 50  0001 C CNN   101 F 3 "~" H 4050 2400 50  0001 C CNN   102 	1    4050 2400   103 	0    -1   -1   0      104 $EndComp   105 $Comp   106 L Device:R R?   107 U 1 1 61EC886F   108 P 4050 2000   109 AR Path="/61EC886F" Ref="R?"  Part="1"    110 AR Path="/61E9B87F/61EC886F" Ref="R66"  Part="1"    111 F 0 "R66" V 3843 2000 50  0000 C CNN   112 F 1 "10R" V 3934 2000 50  0000 C CNN   113 F 2 "" V 3980 2000 50  0001 C CNN   114 F 3 "~" H 4050 2000 50  0001 C CNN   115 	1    4050 2000   116 	0    1    1    0      117 $EndComp   118 Wire Wire Line   119 	3900 2400 3800 2400   120 Wire Wire Line   121 	3800 2400 3800 2000   122 Wire Wire Line   123 	3800 2000 3900 2000   124 Text GLabel 3400 3200 3    50   Input ~ 0   125 0V   126 Wire Wire Line   127 	3400 2100 3400 2000   128 Wire Wire Line   129 	3400 2000 3800 2000   130 Connection ~ 3800 2000   131 Text GLabel 4300 2000 2    50   Input ~ 0   132 5V   133 Text GLabel 4300 2400 2    50   Input ~ 0   134 0V   135 Wire Wire Line   136 	4200 2000 4300 2000   137 Wire Wire Line   138 	4200 2400 4300 2400   139 $Comp   140 L Device:CP C?   141 U 1 1 61EC8881   142 P 5250 2600   143 AR Path="/61EC8881" Ref="C?"  Part="1"    144 AR Path="/61E9B87F/61EC8881" Ref="C11"  Part="1"    145 F 0 "C11" V 5500 2600 50  0000 C CNN   146 F 1 "10??F/35V" V 5400 2600 38  0000 C CNN   147 F 2 "" H 5288 2450 50  0001 C CNN   148 F 3 "~" H 5250 2600 50  0001 C CNN   149 	1    5250 2600   150 	0    -1   -1   0      151 $EndComp   152 Wire Wire Line   153 	4900 2600 5100 2600   154 $Comp   155 L Device:Speaker SPKR?   156 U 1 1 61EC8889   157 P 5900 2600   158 AR Path="/61EC8889" Ref="SPKR?"  Part="1"    159 AR Path="/61E9B87F/61EC8889" Ref="SPKR1"  Part="1"    160 F 0 "SPKR1" H 6069 2596 50  0000 L CNN   161 F 1 "16R" H 6069 2505 50  0000 L CNN   162 F 2 "" H 5900 2400 50  0001 C CNN   163 F 3 "~" H 5890 2550 50  0001 C CNN   164 	1    5900 2600   165 	1    0    0    -1     166 $EndComp   167 Wire Wire Line   168 	5400 2600 5700 2600   169 Text GLabel 5600 2700 0    50   Input ~ 0   170 0V   171 Wire Wire Line   172 	5600 2700 5700 2700   173 Wire Wire Line   174 	3400 3200 3400 3100   175 Text GLabel 1700 2100 2    50   Output ~ 0   176 SOUND_OUTPUT_EXPANSION   177 Wire Wire Line   178 	1600 2200 1600 2100   179 Wire Wire Line   180 	1600 2100 1700 2100   181 Text GLabel 1400 2600 0    50   Input ~ 0   182 SOUND_OUTPUT   183 $EndSCHEMATC