c42ebcb8260fcb1adced68f340d4762cb47c6647
CONN-DAT/CONN-power-dat/CONN-XLR-dat/CONN-XLR-dat.md
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| 1 | + |
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| 2 | + |
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| 3 | +# CONN-XLR-dat.md |
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| 4 | + |
|
| 5 | +# Advantages of XLR Connectors |
|
| 6 | + |
|
| 7 | +XLR connectors are the industry standard for professional audio and certain high-end data applications. Their design offers specific mechanical and electrical advantages that ensure signal integrity and hardware durability. |
|
| 8 | + |
|
| 9 | +--- |
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| 10 | + |
|
| 11 | +## **1. Balanced Audio Signal** |
|
| 12 | +The most significant advantage is the ability to carry a **balanced signal**, which is essential for professional environments. |
|
| 13 | + |
|
| 14 | +* **Noise Rejection:** An XLR cable typically uses three pins: ground, positive (hot), and negative (cold). It uses **Differential Signaling** to cancel out electromagnetic interference (EMI) and radio frequency interference (RFI). |
|
| 15 | +* **Long Cable Runs:** Because the balanced design cancels noise, you can run XLR cables for 30 meters or more without signal degradation. In contrast, unbalanced cables (like RCA) usually pick up "hum" after just a few meters. |
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| 16 | + |
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| 17 | + |
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| 18 | + |
|
| 19 | +--- |
|
| 20 | + |
|
| 21 | +## **2. Robust Locking Mechanism** |
|
| 22 | +Unlike standard 6.35mm jacks or USB connectors that rely on friction, XLR connectors feature a **spring-loaded locking latch**. |
|
| 23 | + |
|
| 24 | +* **Physical Security:** Once plugged in, the connection is locked. You must press a release tab to unplug it. This prevents accidental disconnections during live events or in mobile robotics/machinery. |
|
| 25 | +* **Durability:** The housings are typically made of zinc alloy or high-strength plastic, designed to withstand heavy use, being stepped on, or dropped in rugged field conditions. |
|
| 26 | + |
|
| 27 | +--- |
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| 28 | + |
|
| 29 | +## **3. "Make-First, Break-Last" Grounding** |
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| 30 | +The design of the pins provides a specific safety feature known as "Make-First, Break-Last." |
|
| 31 | + |
|
| 32 | +* **Pin 1 Priority:** If you look at a male XLR connector, Pin 1 (the ground pin) is slightly longer. This ensures that the ground connection is established **before** the signal pins make contact. |
|
| 33 | +* **Equipment Protection:** This prevents loud electrical "pops" or surges that could damage sensitive speakers, amplifiers, or microcontrollers when plugging equipment in while it is powered on (hot-swapping). |
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| 34 | + |
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| 35 | + |
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| 36 | + |
|
| 37 | +--- |
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| 38 | + |
|
| 39 | +## **4. Phantom Power & Standardization** |
|
| 40 | +* **Power Delivery:** XLR is the standard interface for delivering **48V Phantom Power** to condenser microphones, removing the need for external batteries. |
|
| 41 | +* **Daisy-Chaining:** Because they have distinct male and female ends, you can easily connect multiple cables together to extend their reach without needing gender-changers or special adapters. |
|
| 42 | +* **Universal Standard:** The pin configuration is a global standard (Pin 1: Ground, Pin 2: Positive, Pin 3: Negative), ensuring compatibility across all professional hardware worldwide. |
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| 43 | + |
|
| 44 | +--- |
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| 45 | + |
|
| 46 | +## **Summary Comparison** |
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| 47 | + |
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| 48 | +| Feature | XLR (Balanced) | 6.35mm / RCA (Unbalanced) | |
|
| 49 | +| :--- | :--- | :--- | |
|
| 50 | +| **Interference** | Excellent Noise Rejection | High Sensitivity to Noise | |
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| 51 | +| **Security** | Locking Latch | Friction Fit (Easily Pulled Out) | |
|
| 52 | +| **Max Length** | 50m+ | Typically <6m | |
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| 53 | +| **Durability** | High (Pro Grade) | Moderate (Consumer Grade) | |
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| 54 | + |
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| 55 | + |
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| 56 | + |
|
| 57 | +## ref |
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| 58 | + |
Chip-cn-dat/everest-semi-dat/ES8311-dat/2026-05-08-16-31-13.png
| ... | ... | Binary files /dev/null and b/Chip-cn-dat/everest-semi-dat/ES8311-dat/2026-05-08-16-31-13.png differ |
Chip-cn-dat/everest-semi-dat/ES8311-dat/ES8311-dat.md
| ... | ... | @@ -3,6 +3,10 @@ |
| 3 | 3 | |
| 4 | 4 | - [[adc-dat]] - [[dac-dat]] - [[record-dat]] - [[playback-dat]] - [[everest-semi-dat]] |
| 5 | 5 | |
| 6 | +- [[audio-dat]] - [[ES8311-dat]] |
|
| 7 | + |
|
| 8 | +- [[sensor-microphone-dat]] - [[sensor-microphone-Analog-dat]] |
|
| 9 | + |
|
| 6 | 10 | ## ES8311 |
| 7 | 11 | |
| 8 | 12 | refer use guide in [[I2S-SDK-dat]] |
| ... | ... | @@ -21,7 +25,18 @@ System |
| 21 | 25 | http://www.everest-semi.com/pdf/ES8311%20PB.pdf |
| 22 | 26 | |
| 23 | 27 | |
| 28 | +## pins |
|
| 24 | 29 | |
| 30 | + ESP32S3开发板（16MFLASH) - ES8311-NS4150B-CODEC音频模块 - 说明 |
|
| 31 | + GPIO_NUM_5 -- SDA -- 串口数据信号线 |
|
| 32 | + GPIO_NUM_4 -- SCL -- 串行数据位时钟/DMIC位时钟 |
|
| 33 | + GPIO_NUM_6 -- MCLK -- 主时钟 |
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| 34 | + GPIO_NUM_14 -- SCLK -- 位时钟 |
|
| 35 | + GPIO_NUM_11 -- DIN -- 数据输入 |
|
| 36 | + GPIO_NUM_12 -- LRCK -- 片选 |
|
| 37 | + GPIO_NUM_13 -- DOUT -- 数据输出 |
|
| 38 | + 5V/5Vin（如有供电引脚） -- SV -- 电源，NS4150B音频功放供电 |
|
| 39 | + GND -- GND -- 负极/接地 |
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| 25 | 40 | |
| 26 | 41 | |
| 27 | 42 | |
| ... | ... | @@ -68,6 +83,7 @@ DAC `PLAYBACK` FUNCTIONS |
| 68 | 83 | |
| 69 | 84 |  |
| 70 | 85 | |
| 86 | + |
|
| 71 | 87 | ## SCH |
| 72 | 88 | |
| 73 | 89 |  |
Chip-cn-dat/linkmems-dat/linkmems-dat.md
| ... | ... | @@ -6,6 +6,12 @@ |
| 6 | 6 | - [[memsensing-dat]] - [[zilltek-dat]] - [[linkmems-dat]] |
| 7 | 7 | |
| 8 | 8 | |
| 9 | + |
|
| 10 | +LMA2718T381-OAC02 |
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| 11 | + |
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| 12 | + |
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| 13 | +LMD3526T |
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| 14 | + |
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| 9 | 15 |  |
| 10 | 16 | |
| 11 | 17 |  |
Chip-cn-dat/memsensing-dat/MSM261S4030H0R-dat/MSM261S4030H0R-dat.md
| ... | ... | @@ -1,8 +1,7 @@ |
| 1 | 1 | |
| 2 | -# |
|
| 3 | - |
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| 4 | - |
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| 2 | +# MSM261S4030H0R-dat |
|
| 5 | 3 | |
| 4 | +- [[memsensing-dat]] - [[sensor-microphone-dat]] |
|
| 6 | 5 | |
| 7 | 6 | - [[sensor-microphone-I2S-dat]] - [[sensor-microphone-I2S]] |
| 8 | 7 |
Chip-cn-dat/memsensing-dat/memsensing-dat.md
| ... | ... | @@ -13,8 +13,6 @@ |
| 13 | 13 | MEMS(敏芯微) |
| 14 | 14 | |
| 15 | 15 | |
| 16 | - |
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| 17 | - |
|
| 18 | 16 | - [[MSM261S4030H0R-dat]] |
| 19 | 17 | |
| 20 | 18 |
SDK-dat/interface-SDK-dat/I2S-SDK-dat/I2S-SDK-dat.md
| ... | ... | @@ -18,14 +18,14 @@ The ESP32-P4 includes one I2S peripheral. By configuring this peripheral, you ca |
| 18 | 18 | |
| 19 | 19 |  |
| 20 | 20 | |
| 21 | -| Function Pin | ESP32-P4 Pin | |
|
| 22 | -|--------------|-------------| |
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| 23 | -| MCLK | GPIO13 | |
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| 24 | -| SCLK | GPIO12 | |
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| 25 | -| ASDOUT | GPIO11 | |
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| 26 | -| LRCK | GPIO10 | |
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| 27 | -| DSDIN | GPIO9 | |
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| 28 | -| PA_Ctrl (Amp Enable, High Active) | GPIO53 | |
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| 21 | +| Function Pin | | ESP32-P4 Pin | |
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| 22 | +| --------------------------------- | ---- | ------------ | |
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| 23 | +| MCLK | MCLK | GPIO13 | |
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| 24 | +| SCLK | BCK | GPIO12 | |
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| 25 | +| ASDOUT | DO | GPIO11 | |
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| 26 | +| LRCK | WS | GPIO10 | |
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| 27 | +| DSDIN | DI | GPIO9 | |
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| 28 | +| PA_Ctrl (Amp Enable, High Active) | | GPIO53 | |
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| 29 | 29 | |
| 30 | 30 | The ES8311 driver for ESP32-P4 uses the ES8311 component, which can be added via the IDF Component Manager: |
| 31 | 31 |
Sensor-dat/sensor-microphone-dat/sensor-microphone-dat.md
| ... | ... | @@ -15,7 +15,7 @@ |
| 15 | 15 | |
| 16 | 16 | ## chips |
| 17 | 17 | |
| 18 | -- [[mems-dat]] - [[zilltek-dat]] - [[linkmems-dat]] |
|
| 18 | +- [[memsensing-dat]] - [[sensor-microphone-dat]] - [[zilltek-dat]] - [[linkmems-dat]] |
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| 19 | 19 | |
| 20 | 20 | |
| 21 | 21 | - [[sensor-microphone-dat]] - [[motor-driver-dat]] - [[LM358-dat]] |
mechanics-dat/mechanical-structure-dat/Shaft-dat/Shaft-dat.md
| ... | ... | @@ -25,7 +25,7 @@ |
| 25 | 25 | |
| 26 | 26 | ## smooth shaft accessories |
| 27 | 27 | |
| 28 | -- [[shaft-dat]] - [[shaft-limit-ring-dat]] - [[hose-clamp-dat]] |
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| 28 | +- [[shaft-dat]] - [[shaft-locking-dat]] |
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| 29 | 29 | |
| 30 | 30 | - [[shaft-coupler-dat]] - [[Shaft-Cross-Connector-dat]] |
| 31 | 31 |
mechanics-dat/mechanical-structure-dat/Shaft-dat/shaft-locking-dat.md
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| 1 | + |
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| 2 | + |
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| 3 | +# shaft-locking-dat.md |
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| 4 | + |
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| 5 | +- [[shaft-dat]] - [[shaft-locking-dat]] |
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| 6 | + |
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| 7 | +- [[shaft-limit-ring-dat]] - [[hose-clamp-dat]] |
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| 8 | + |
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| 9 | + |
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| 10 | +## most common locking method |
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| 11 | + |
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| 12 | +- velcro straps |
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| 13 | +- zip ties |
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| 14 | +- metal zip ties |
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| 15 | + |
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| 16 | + |
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| 17 | +## other common locking methods 以下是一些常见的固定方式： |
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| 18 | + |
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| 19 | +一、管道连接和固定方式 (Pipe/Tube Connections and Fasteners): |
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| 20 | + |
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| 21 | +1. 螺纹连接 (Threaded Connection): 通过管道和管件上的内外螺纹直接连接。常见于小直径管道，安装和拆卸方便。 |
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| 22 | +2. 法兰连接 (Flange Connection): 通过法兰盘、螺栓和垫片将管道或设备连接起来。承压能力强，常用于高压工况、大口径管道及需要频繁检修的场合。 |
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| 23 | +3. 焊接连接 (Welding Connection): 通过加热使管道接口和焊条熔合连接。连接牢固、密封性好、耐用且成本低，常用于不镀锌钢管和大直径管道。 |
|
| 24 | +4. 卡压式连接 (Press-Fit/Compression Connection): 使用带有特制橡胶密封圈的管件，通过专用工具挤压，实现密封和定位固定。安装快捷、密封可靠，但通常不能拆卸。 |
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| 25 | +5. 沟槽连接 / 卡箍连接 (Grooved Clamp Connection): 在管材、管件接头处加工环形沟槽，使用卡箍和橡胶密封圈连接。施工快捷、密封性好、便于拆卸，广泛应用于消防、空调、给水等大直径管道系统。 |
|
| 26 | +6. 卡套式连接 (Ferrule/Compression Fitting): 将配件螺母套在管道端头，通过螺旋力将管口套管压缩，实现密封连接。安装方便，可拆卸，常用于铝塑复合管和铜管。 |
|
| 27 | +7. 热熔连接 (Hot-Melt Connection): 主要用于PPR等塑料管道，通过热熔器将管道两端加热后连接。 |
|
| 28 | +8. 承插连接 (Socket Connection): 主要用于铸铁管的连接，有柔性连接（橡胶圈密封）和刚性连接（石棉水泥或膨胀性填料密封）两种。 |
|
| 29 | +9. 抱箍式连接 (Clamp Connection - for ducts): 主要用于圆形钢制通风管道与螺旋风管之间的连接。 |
|
| 30 | +10. 软管式连接 (Hose Connection): 通常指用于管道之间柔性连接的方式。 |
|
| 31 | + |
|
| 32 | +二、其他固定和支撑方式 (Other Fastening and Support Methods): |
|
| 33 | + |
|
| 34 | +1. 铆钉 (Rivets): 可以将管道连接到其他结构，在需要强度且不希望有突出部分时使用。 |
|
| 35 | +2. 粘合剂 (Adhesive): 在特定应用中，可以使用强力粘合剂来连接管件或将管道固定到其他表面，特别是在需要平滑表面或不使用机械紧固件的情况下。 |
|
| 36 | +3. 螺钉/螺栓 (Screws/Bolts): 可以通过多种方式将管状结构固定到板材或框架上，例如配合使用单孔或双孔管夹（straps）、法兰连接件。 |
|
| 37 | +4. 管夹（Pipe Clamps - general）: 除了喉箍，还有各种工业管夹，以及用于将管道固定到墙壁或结构上的专用管夹和吊架。 |
|
| 38 | +5. 支架和吊架 (Brackets and Hangers): 定制或购买各种支架和吊架，将管道固定在墙壁、天花板或其他结构上，如U型支架、吊杆等。 |
|
| 39 | +6. 膨胀螺栓/锚栓 (Anchors): 当管道需要固定在混凝土或砖石结构上时，可配合管夹使用膨胀螺栓或化学锚栓。 |
|
| 40 | +7. 槽钢和U型夹 (Strut Channel and U-Bolts): 在工业和建筑领域，常用槽钢配合U型螺栓或其他专用夹具来支撑和固定管道。 |
|
| 41 | +8. 棘轮捆绑带 / 捆扎材料 (Ratchet Straps / Strapping Material): 适用于临时固定、运输或需要施加较大压力的场合。 |
|
| 42 | +9. 管垫块和缓冲环 (Pipe Chocks and Bumper Rings): 在管道运输和储存过程中，防止管道滚动或移动，或保护管道免受冲击损伤。 |
|
| 43 | + |
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| 44 | +在选择固定方式时，需要综合考虑管道材质、尺寸、环境条件（温度、压力、腐蚀、振动）、承重要求、是否需要频繁拆卸、安装便捷性、成本、美观性以及相关的法规和标准。 |
|
| 45 | + |
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| 46 | + |
|
| 47 | +## ref |
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| 48 | + |
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| 49 | + |
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| 50 | + |