Board-dat/MSP/MSP1014-dat/MSP1014-dat.md
... ...
@@ -1,7 +1,16 @@
1 1
2 2
# MSP1014-dat
3 3
4
+## Info
5
+
6
+[product url - LM386 Audio Amplifier, 200X Gain](https://www.electrodragon.com/product/lm386-audio-amplifier-20x-gain/)
4 7
5 8
## ref
6 9
7
-- [[LM386-dat]]
... ...
\ No newline at end of file
0
+- [[MSP1014]]
1
+
2
+- [legacy wiki page](https://www.electrodragon.com/w/LM386)
3
+
4
+- [[LM386-dat]]
5
+
6
+[SimpleAudioPlayer](http://arduino.cc/en/Tutorial/SimpleAudioPlayer)
... ...
\ No newline at end of file
Chip-dat/TI-dat/LM386-dat/2025-04-03-14-07-36.png
... ...
Binary files /dev/null and b/Chip-dat/TI-dat/LM386-dat/2025-04-03-14-07-36.png differ
Chip-dat/TI-dat/LM386-dat/2025-04-03-14-07-52.png
... ...
Binary files /dev/null and b/Chip-dat/TI-dat/LM386-dat/2025-04-03-14-07-52.png differ
Chip-dat/TI-dat/LM386-dat/LM386-dat.md
... ...
@@ -4,19 +4,91 @@
4 4
legacy wiki page - https://w.electrodragon.com/w/LM386
5 5
6 6
7
-- gain 200：R1=0
8
-- gain 50：R1=1.2K
9
-- gain 20：R1，C1，C2 NC
7
+
10 8
11 9
## SCH
12 10
11
+
12
+
13
+| gain | R4/RPI1 (pot-trim) | R1 | C1 | C2 |
14
+| ---- | ------------------ | ---- | ---- | --- |
15
+| 10x | 10K | | - | |
16
+| 14x | 5K | | - | |
17
+| 20x | 2K | - | - | - |
18
+| 50x | | 1.2K | 10uF | |
19
+| 100x | | - | 10uF | |
20
+| 200x | | 0 | 10uF | |
21
+
22
+![](2025-04-03-14-07-36.png)
23
+
13 24
![](2024-03-26-15-35-38.png)
14 25
26
+
27
+LM386 with microphone, Amplification is controlled by R2 in schematic 2
28
+
29
+![](2025-04-03-14-07-52.png)
30
+
31
+
32
+
33
+| BOM | value | explain |
34
+| --- | ------- | ---------------------------------------------- |
35
+| C1 | 1~10uF | Bypass capacitor |
36
+| C2 | 10uF | Gain 200x. Optional, without 10uf is 20x gain. |
37
+| C3 | 220uF | Output coupling capacitor |
38
+| C4 | 47nF | Boucherot cell |
39
+| C5 | 100nF | Power supply decoupling |
40
+| C6 | 100uF | Power supply decoupling |
41
+| C7 | 10uF | Microphone coupling capacitor |
42
+| MIC | | Electret microphone |
43
+| R1 | 10R | Boucherot cell |
44
+| R2 | 1 ~ 10K | Microphone load resistor |
45
+| VSS | 4 ~ 12V | Supply voltage |
46
+
47
+
48
+
49
+
50
+
51
+## demo code
52
+
53
+Only generate very simple sound for testing.
54
+
55
+
56
+ #define SOUNDOUT_PIN 9
57
+
58
+ void setup(void){
59
+ //Set the sound out pin to output mode
60
+ pinMode(SOUNDOUT_PIN,OUTPUT);
61
+ }
62
+
63
+ void loop(void){
64
+ //Generate sound by toggling the I/O pin High and Low
65
+ //Generate a 1KHz tone. set the pin high for 500uS then
66
+ //low for 500uS to make the period 1ms or 1KHz.
67
+
68
+ //Set the pin high and delay for 1/2 a cycle of 1KHz, 500uS.
69
+ digitalWrite(SOUNDOUT_PIN,HIGH);
70
+ delayMicroseconds(500);
71
+
72
+ //Set the pin low and delay for 1/2 a cycle of 1KHz, 500uS.
73
+ digitalWrite(SOUNDOUT_PIN,LOW);
74
+ delayMicroseconds(500);
75
+ }
76
+
77
+## online simulation
78
+
79
+- https://www.circuitlab.com/circuit/hcqmtsvrz7mw/lm386/
80
+- https://www.circuitlab.com/browse/by-tag/lm386/
81
+
82
+
15 83
## demo
16 84
17 85
https://www.youtube.com/watch?v=Q6ArZWTh-w0&ab_channel=Electrodragon
18 86
19 87
88
+
89
+
20 90
## ref
21 91
92
+- [[EDA-simulation-dat]]
93
+
22 94
- [[LM386]]
... ...
\ No newline at end of file