Changes in 2a374f5: ov3660

				Chip-dat/OmniVision-dat/OV3660-dat/OV3660-dat.md
			
          @@ -2,6 +2,9 @@

           # OV3660-dat

          +

          +- [[OV3660-dat]] - [[OV2640-dat]] - [[OV5640-dat]] - [[omnivision-dat]]

          +

           - [[sensor-camera-dat]] - [[sensor-camera-HDK-dat]] - [[OmniVision-dat]] - [[LDO-2CH-dat]]

           - [[ESP32-S3-dat]]

				Chip-dat/OmniVision-dat/OmniVision-dat.md
			
          @@ -7,6 +7,8 @@ legacy wiki page - https://w.electrodragon.com/w/OV_Camera

           ## Chip Overview

          +- [[OV3660-dat]] - [[OV2640-dat]] - [[OV5640-dat]] - [[omnivision-dat]]

          +

           - [[OV3660-dat]] - [[omnivision-dat]]

          @@ -17,13 +19,51 @@ legacy wiki page - https://w.electrodragon.com/w/OV_Camera

           | -------------- | ----------- | ------------------- | --------------- |

           | [[OV7670-dat]] | 30 MP       |                     |                 |

           | [[OV7725-dat]] | 30 MP       | OV7670              |                 |

          -| [[OV2640-dat]]         | 200 MP      |                     |                 |

          +| [[OV2640-dat]] | 200 MP      |                     |                 |

           | OV2710         | 200 MP      |                     | 1920X1080@30fps |

           | OV5640         |             |                     |                 |

           | OV9712         |             |                     |                 |

           | OV9732         |             |                     |                 |

          +## common option Camera Sensor Comparison: OV2640 vs. OV3660 vs. OV5640

          +

          +The following table compares the three most popular image sensors used with the ESP32 and ESP32-S3 platforms.

          +

          +| Feature             | OV2640                    | OV3660                     | OV5640                     |

          +| :------------------ | :------------------------ | :------------------------- | :------------------------- |

          +| **Max Resolution**  | 2 MP (1600 x 1200)        | 3 MP (2048 x 1536)         | **5 MP** (2592 x 1944)     |

          +| **Optical Size**    | 1/4"                      | 1/5"                       | 1/4"                       |

          +| **Pixel Size**      | 2.2 $\mu m$ x 2.2 $\mu m$ | 1.4 $\mu m$ x 1.4 $\mu m$  | 1.4 $\mu m$ x 1.4 $\mu m$  |

          +| **Architecture**    | FSI (Front Side Illum.)   | **BSI** (Back Side Illum.) | **BSI** (Back Side Illum.) |

          +| **Interface**       | DVP (Parallel)            | DVP (Parallel)             | DVP & MIPI                 |

          +| **Max Frame Rate**  | 15 fps @ UXGA             | 15 fps @ QXGA              | 15 fps @ QSXGA             |

          +| **720p HD Video**   | N/A (Sub-sampled)         | 45 fps                     | **60 fps**                 |

          +| **1080p Video**     | No                        | 20 fps                     | **30 fps**                 |

          +| **Autofocus**       | No (Fixed/Manual)         | No (Fixed/Manual)          | **Yes** (Optional AF)      |

          +| **JPEG Encoder**    | Built-in                  | Built-in                   | Built-in                   |

          +| **Low Light Perf.** | Average                   | **Excellent**              | Good                       |

          +| **Sensitivity**     | 0.6 V/Lux-sec             | 0.67 V/Lux-sec             | 0.6 V/Lux-sec              |

          +| **Dynamic Range**   | 50 dB                     | **70 dB**                  | 68 dB                      |

          +

          +---

          +

          +### Summary Recommendation

          +

          +* **OV2640 (The Reliable Standard):** Best for basic streaming and general IoT. It is the most widely supported sensor for the original **ESP32-CAM (AI-Thinker)** and consumes the least power.

          +* **OV3660 (The AI/Low-Light Specialist):** Highly recommended for **ESP32-S3** projects involving computer vision or face detection. Its **BSI (Back Side Illumination)** architecture and higher dynamic range make it significantly better in dim environments.

          +* **OV5640 (The Photographer):** Choose this if you need high-resolution still photos or QR code scanning. The **Autofocus (AF)** version is a game-changer for macro photography or reading documents. Note that it runs much hotter than the OV2640.

          +

          +

          +

          +---

          +

          +### Technical Implementation Tip

          +When switching between these sensors on an ESP32, you usually only need to change the `PIXFORMAT` and `FRAMESIZE` in your `camera_config_t`. However, the **OV5640** often requires a more robust power supply (at least 500mA) to handle the peak current during initialization and autofocus.

          +

          +Would you like me to provide the specific initialization code for the OV5640 to enable its autofocus features?

          +

          +

				Chip-dat/avago-dat/2026-03-02-19-32-06.png
			
          Binary files /dev/null and b/Chip-dat/avago-dat/2026-03-02-19-32-06.png differ

				Chip-dat/avago-dat/apds-9960-dat.md
			
          @@ -15,6 +15,22 @@

           - [[SSL1045-dat]]

          +## I/O Pins Configuration

          +

          +| Pin | Name | Type | Description |

          +|-----|------|------|-------------|

          +| 1 | SDA | I/O | I2C serial data I/O terminal |

          +| 2 | INT | Output | Interrupt - open drain (active low) |

          +| 3 | LDR | Input | LED driver input for proximity IR LED, constant current source |

          +| 4 | LEDK | Output | LED driver LED Cathode, connect to LDR pin when using internal LED driver circuit |

          +| 5 | LEDA | Input | LED Anode, connect to VLEDA on PCB |

          +| 6 | GND | Power | Power supply ground. All voltages are referenced to GND |

          +| 7 | SCL | Input | I2C serial clock input terminal - clock signal for I2C serial data |

          +| 8 | VDD | Power | Power supply voltage |

          +

          +

          +![](2026-03-02-19-32-06.png)

          +

           ## APDS-9960

				Tech-dat/Sensor-dat/sensor-motion-dat/sensor-hall-dat/2026-03-02-20-54-07.png
			
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				Tech-dat/Sensor-dat/sensor-motion-dat/sensor-hall-dat/sensor-hall-dat.md
			
          @@ -91,6 +91,16 @@ CC6207ST SOT-23 Omnipolar Low-Power Hall Effect Switch Sensor

          +## integrated hall sensor in motor 

          +

          +- 6 wires 

          +

          +![](2026-03-02-20-54-07.png)

          +

          +

          +

          +

          +

           ## ref 

           - [[sensor-motion-dat]]

				Tech-dat/acturator-dat/motor-dat/motor-brushless-dat/2026-03-02-20-49-56.png
			
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				Tech-dat/acturator-dat/motor-dat/motor-brushless-dat/2026-03-02-20-55-47.png
			
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				Tech-dat/acturator-dat/motor-dat/motor-brushless-dat/motor-brushless-dat.md
			
          @@ -10,6 +10,10 @@

           - [[gear-dat]] - [[thread-dat]]

          +- [[sensor-hall-dat]] 

          +

          +

          +

           ## board 

           - [[SDR1106-dat]]

          @@ -141,6 +145,39 @@ A "**Hall Sensor Brushless Motor**" (有感无刷有霍尔马达) refers to a **

          +## internal of a brushelss motor 

          +

          +![](2026-03-02-20-49-56.png)

          +

          +

          +## brushless motor with hall sensor for mobility 

          +

          +![](2026-03-02-20-55-47.png)

          +

          +- A 款电机引线长 ：大约 800 MM

          +- A 款电机重量 :2.573 KG

          +- B 款电机引线长 ：大约 80 MM

          +- B 款电机重量 ：2.429 KG

          +- （电机的外壳尺寸基本一样）

          +- 我们用一款小无刷电机驱动电机（八线）驱动电机，实测转速和电流如下：

          +- 电压 ：DC30V

          +  - 空载电流 :0.91 A

          +  - 空载最高转速 :304 RPM

          +- 电压 ：DC36V

          +  - 空载电流 :1 A

          +  - 空载最高转速 :365 RPM

          +- 电压 ：DC42V

          +  - 空载电流 :1.1 A

          +  - 空载最高转速 :426 RPM

          +- 电压 ：DC48V

          +  - 空载电流 :1.2 A

          +  - 空载最高转速 :485 RPM

          +

          +

          +

          +## apps 

          +

          +- [[electric-scooter-dat]] - [[roller-dat]]

           ## ref

				Tech-dat/acturator-dat/motor-dat/motor-dat.md
			
          @@ -40,7 +40,7 @@ brushed

           - [[FPV-motor-dat]]

          -- [[motor-linear-dat]]

          +- [[motor-linear-dat]] - [[motor-rank-dat]]

           | Type                           | Brushed / Brushless | Key Traits                                     | Application                              |

           | ------------------------------ | ------------------- | ---------------------------------------------- | ---------------------------------------- |

				Tech-dat/acturator-dat/motor-dat/motor-rank-dat/motor-rank-dat.md
			
          @@ -0,0 +1,8 @@

          +

          +

          +# motor-rank-dat

          +

          +

          +## ref 

          +

          +- [[motor]] - [[motor-dat]]

          \ No newline at end of file

				app-dat/electric-scooter-dat/electric-scooter-dat.md
			
          @@ -0,0 +1,33 @@

          +

          +# electric-scooter-dat

          +

          +- [[electric-scooter-dat]] - [[roller-dat]]

          +

          +

          +

          +

          +## Electric Scooter RPM at 20 km/h

          +

          +For a standard electric scooter or bike (with 14–16 inch outer tire diameter), the motor speed at **20 km/h** is typically between **250 and 300 RPM**.

          +

          +#### Core Calculation Formula:

          +$$RPM = \frac{Speed (km/h) \times 16.67}{Tire Circumference (meters)}$$

          +

          +#### Common Tire Size Reference:

          +| Tire Outer Diameter | Circumference | RPM at 20 km/h | Typical Vehicle |

          +| :--- | :--- | :--- | :--- |

          +| **14 inch** | ~1.12 m | **~298 RPM** | Compact E-bikes |

          +| **16 inch** | ~1.28 m | **~260 RPM** | Standard Scooters |

          +

          +

          +

          +## tech 

          +

          +- [[motor-brushless-dat]] - [[motor-dat]]

          +

          +

          +

          +

          +## ref 

          +

          +

				app-dat/robot-dat/robot-dat.md
			
          @@ -46,7 +46,8 @@

           [[control-system-dat]] - [[RPI-dat]] - [[PS2-console-dat]] - [[SBC-dat]]

          -[[sensor-dat]] - [[sensor-Camera-dat]] - [[RPI-camera-dat]]

          +[[sensor-dat]] - [[sensor-Camera-dat]] - [[RPI-camera-dat]] - [[sensor-gesture-dat]]

          +

           [[power-dat]] - [[lithium-battery-dat]]

				mechanics-dat/mechanical-parts-dat/gear-dat/gear-dat.md
			
          @@ -1,7 +1,7 @@

           # gear-dat

          -

          +- [[gear-dat]] - [[gearbox-dat]]

           - [[RPM-dat]] - [[physics-dat]] - [[gear-dat]] - [[Sprocket-dat]] - [[wheel-dat]]

				mechanics-dat/mechanism-dat/gearbox-dat/2026-03-02-20-51-29.png
			
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				mechanics-dat/mechanism-dat/gearbox-dat/2026-03-02-20-51-45.png
			
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				mechanics-dat/mechanism-dat/gearbox-dat/gearbox-dat.md
			
          @@ -3,9 +3,25 @@

           - [[gear-dat]] - [[gear-worm-dat]] - [[gearbox-dat]]

          +- [[gear-dat]] - [[gearbox-dat]]

          +## type of gearbox 

          +

          +### Planetary Gearbox: 

          +

          +These are highly efficient and keep the output shaft in line with the motor shaft. They are great for high-torque applications like robotics or electric vehicles.

          +

          +![](2026-03-02-20-51-29.png)

          +

          +![](2026-03-02-20-51-45.png)

          +

          +### Worm Gearbox: 

          +

          +These provide massive reduction in a small space (e.g., 60:1) and have a "self-locking" feature, meaning the output shaft won't turn unless the motor is spinning.

          +

          +

           ## common gearbox

...	...	@@ -10,6 +10,10 @@
10	10
11	11	- [[gear-dat]] - [[thread-dat]]
12	12
	13	+- [[sensor-hall-dat]]
	14	+
	15	+
	16	+
13	17	## board
14	18
15	19	- [[SDR1106-dat]]
...	...	@@ -141,6 +145,39 @@ A "Hall Sensor Brushless Motor" (有感无刷有霍尔马达) refers to a **
141	145
142	146
143	147
	148	+## internal of a brushelss motor
	149	+
	150	+![](2026-03-02-20-49-56.png)
	151	+
	152	+
	153	+## brushless motor with hall sensor for mobility
	154	+
	155	+![](2026-03-02-20-55-47.png)
	156	+
	157	+- A 款电机引线长：大约 800 MM
	158	+- A 款电机重量 :2.573 KG
	159	+- B 款电机引线长：大约 80 MM
	160	+- B 款电机重量：2.429 KG
	161	+- （电机的外壳尺寸基本一样）
	162	+- 我们用一款小无刷电机驱动电机（八线）驱动电机，实测转速和电流如下：
	163	+- 电压：DC30V
	164	+ - 空载电流 :0.91 A
	165	+ - 空载最高转速 :304 RPM
	166	+- 电压：DC36V
	167	+ - 空载电流 :1 A
	168	+ - 空载最高转速 :365 RPM
	169	+- 电压：DC42V
	170	+ - 空载电流 :1.1 A
	171	+ - 空载最高转速 :426 RPM
	172	+- 电压：DC48V
	173	+ - 空载电流 :1.2 A
	174	+ - 空载最高转速 :485 RPM
	175	+
	176	+
	177	+
	178	+## apps
	179	+
	180	+- [[electric-scooter-dat]] - [[roller-dat]]
144	181
145	182	## ref
146	183

...	...	@@ -2,6 +2,9 @@
2	2
3	3	# OV3660-dat
4	4
	5	+
	6	+- [[OV3660-dat]] - [[OV2640-dat]] - [[OV5640-dat]] - [[omnivision-dat]]
	7	+
5	8	- [[sensor-camera-dat]] - [[sensor-camera-HDK-dat]] - [[OmniVision-dat]] - [[LDO-2CH-dat]]
6	9
7	10	- [[ESP32-S3-dat]]

...	...	@@ -7,6 +7,8 @@ legacy wiki page - https://w.electrodragon.com/w/OV_Camera
7	7
8	8	## Chip Overview
9	9
	10	+- [[OV3660-dat]] - [[OV2640-dat]] - [[OV5640-dat]] - [[omnivision-dat]]
	11	+
10	12
11	13	- [[OV3660-dat]] - [[omnivision-dat]]
12	14
...	...	@@ -17,13 +19,51 @@ legacy wiki page - https://w.electrodragon.com/w/OV_Camera
17	19	\| -------------- \| ----------- \| ------------------- \| --------------- \|
18	20	\| [[OV7670-dat]] \| 30 MP \| \| \|
19	21	\| [[OV7725-dat]] \| 30 MP \| OV7670 \| \|
20		-\| [[OV2640-dat]] \| 200 MP \| \| \|
	22	+\| [[OV2640-dat]] \| 200 MP \| \| \|
21	23	\| OV2710 \| 200 MP \| \| 1920X1080@30fps \|
22	24	\| OV5640 \| \| \| \|
23	25	\| OV9712 \| \| \| \|
24	26	\| OV9732 \| \| \| \|
25	27
26	28
	29	+## common option Camera Sensor Comparison: OV2640 vs. OV3660 vs. OV5640
	30	+
	31	+The following table compares the three most popular image sensors used with the ESP32 and ESP32-S3 platforms.
	32	+
	33	+\| Feature \| OV2640 \| OV3660 \| OV5640 \|
	34	+\| :------------------ \| :------------------------ \| :------------------------- \| :------------------------- \|
	35	+\| Max Resolution \| 2 MP (1600 x 1200) \| 3 MP (2048 x 1536) \| 5 MP (2592 x 1944) \|
	36	+\| Optical Size \| 1/4" \| 1/5" \| 1/4" \|
	37	+\| Pixel Size \| 2.2 $\mu m$ x 2.2 $\mu m$ \| 1.4 $\mu m$ x 1.4 $\mu m$ \| 1.4 $\mu m$ x 1.4 $\mu m$ \|
	38	+\| Architecture \| FSI (Front Side Illum.) \| BSI (Back Side Illum.) \| BSI (Back Side Illum.) \|
	39	+\| Interface \| DVP (Parallel) \| DVP (Parallel) \| DVP & MIPI \|
	40	+\| Max Frame Rate \| 15 fps @ UXGA \| 15 fps @ QXGA \| 15 fps @ QSXGA \|
	41	+\| 720p HD Video \| N/A (Sub-sampled) \| 45 fps \| 60 fps \|
	42	+\| 1080p Video \| No \| 20 fps \| 30 fps \|
	43	+\| Autofocus \| No (Fixed/Manual) \| No (Fixed/Manual) \| Yes (Optional AF) \|
	44	+\| JPEG Encoder \| Built-in \| Built-in \| Built-in \|
	45	+\| Low Light Perf. \| Average \| Excellent \| Good \|
	46	+\| Sensitivity \| 0.6 V/Lux-sec \| 0.67 V/Lux-sec \| 0.6 V/Lux-sec \|
	47	+\| Dynamic Range \| 50 dB \| 70 dB \| 68 dB \|
	48	+
	49	+---
	50	+
	51	+### Summary Recommendation
	52	+
	53	+* OV2640 (The Reliable Standard): Best for basic streaming and general IoT. It is the most widely supported sensor for the original ESP32-CAM (AI-Thinker) and consumes the least power.
	54	+* OV3660 (The AI/Low-Light Specialist): Highly recommended for ESP32-S3 projects involving computer vision or face detection. Its BSI (Back Side Illumination) architecture and higher dynamic range make it significantly better in dim environments.
	55	+* OV5640 (The Photographer): Choose this if you need high-resolution still photos or QR code scanning. The Autofocus (AF) version is a game-changer for macro photography or reading documents. Note that it runs much hotter than the OV2640.
	56	+
	57	+
	58	+
	59	+---
	60	+
	61	+### Technical Implementation Tip
	62	+When switching between these sensors on an ESP32, you usually only need to change the `PIXFORMAT` and `FRAMESIZE` in your `camera_config_t`. However, the OV5640 often requires a more robust power supply (at least 500mA) to handle the peak current during initialization and autofocus.
	63	+
	64	+Would you like me to provide the specific initialization code for the OV5640 to enable its autofocus features?
	65	+
	66	+
27	67
28	68
29	69

...	...	@@ -15,6 +15,22 @@
15	15
16	16	- [[SSL1045-dat]]
17	17
	18	+## I/O Pins Configuration
	19	+
	20	+\| Pin \| Name \| Type \| Description \|
	21	+\|-----\|------\|------\|-------------\|
	22	+\| 1 \| SDA \| I/O \| I2C serial data I/O terminal \|
	23	+\| 2 \| INT \| Output \| Interrupt - open drain (active low) \|
	24	+\| 3 \| LDR \| Input \| LED driver input for proximity IR LED, constant current source \|
	25	+\| 4 \| LEDK \| Output \| LED driver LED Cathode, connect to LDR pin when using internal LED driver circuit \|
	26	+\| 5 \| LEDA \| Input \| LED Anode, connect to VLEDA on PCB \|
	27	+\| 6 \| GND \| Power \| Power supply ground. All voltages are referenced to GND \|
	28	+\| 7 \| SCL \| Input \| I2C serial clock input terminal - clock signal for I2C serial data \|
	29	+\| 8 \| VDD \| Power \| Power supply voltage \|
	30	+
	31	+
	32	+![](2026-03-02-19-32-06.png)
	33	+
18	34
19	35
20	36	## APDS-9960

...	...	@@ -91,6 +91,16 @@ CC6207ST SOT-23 Omnipolar Low-Power Hall Effect Switch Sensor
91	91
92	92
93	93
	94	+## integrated hall sensor in motor
	95	+
	96	+- 6 wires
	97	+
	98	+![](2026-03-02-20-54-07.png)
	99	+
	100	+
	101	+
	102	+
	103	+
94	104	## ref
95	105
96	106	- [[sensor-motion-dat]]

...	...	@@ -40,7 +40,7 @@ brushed
40	40
41	41	- [[FPV-motor-dat]]
42	42
43		-- [[motor-linear-dat]]
	43	+- [[motor-linear-dat]] - [[motor-rank-dat]]
44	44
45	45	\| Type \| Brushed / Brushless \| Key Traits \| Application \|
46	46	\| ------------------------------ \| ------------------- \| ---------------------------------------------- \| ---------------------------------------- \|

...	...	@@ -0,0 +1,8 @@
	1	+
	2	+
	3	+# motor-rank-dat
	4	+
	5	+
	6	+## ref
	7	+
	8	+- [[motor]] - [[motor-dat]]
...	...	\ No newline at end of file

...	...	@@ -0,0 +1,33 @@
	1	+
	2	+# electric-scooter-dat
	3	+
	4	+- [[electric-scooter-dat]] - [[roller-dat]]
	5	+
	6	+
	7	+
	8	+
	9	+## Electric Scooter RPM at 20 km/h
	10	+
	11	+For a standard electric scooter or bike (with 14–16 inch outer tire diameter), the motor speed at 20 km/h is typically between 250 and 300 RPM.
	12	+
	13	+#### Core Calculation Formula:
	14	+$$RPM = \frac{Speed (km/h) \times 16.67}{Tire Circumference (meters)}$$
	15	+
	16	+#### Common Tire Size Reference:
	17	+\| Tire Outer Diameter \| Circumference \| RPM at 20 km/h \| Typical Vehicle \|
	18	+\| :--- \| :--- \| :--- \| :--- \|
	19	+\| 14 inch \| ~1.12 m \| ~298 RPM \| Compact E-bikes \|
	20	+\| 16 inch \| ~1.28 m \| ~260 RPM \| Standard Scooters \|
	21	+
	22	+
	23	+
	24	+## tech
	25	+
	26	+- [[motor-brushless-dat]] - [[motor-dat]]
	27	+
	28	+
	29	+
	30	+
	31	+## ref
	32	+
	33	+

...	...	@@ -46,7 +46,8 @@
46	46
47	47	[[control-system-dat]] - [[RPI-dat]] - [[PS2-console-dat]] - [[SBC-dat]]
48	48
49		-[[sensor-dat]] - [[sensor-Camera-dat]] - [[RPI-camera-dat]]
	49	+[[sensor-dat]] - [[sensor-Camera-dat]] - [[RPI-camera-dat]] - [[sensor-gesture-dat]]
	50	+
50	51
51	52	[[power-dat]] - [[lithium-battery-dat]]
52	53

...	...	@@ -1,7 +1,7 @@
1	1
2	2	# gear-dat
3	3
4		-
	4	+- [[gear-dat]] - [[gearbox-dat]]
5	5
6	6	- [[RPM-dat]] - [[physics-dat]] - [[gear-dat]] - [[Sprocket-dat]] - [[wheel-dat]]
7	7

...	...	@@ -3,9 +3,25 @@
3	3
4	4	- [[gear-dat]] - [[gear-worm-dat]] - [[gearbox-dat]]
5	5
	6	+- [[gear-dat]] - [[gearbox-dat]]
6	7
7	8
8	9
	10	+## type of gearbox
	11	+
	12	+### Planetary Gearbox:
	13	+
	14	+These are highly efficient and keep the output shaft in line with the motor shaft. They are great for high-torque applications like robotics or electric vehicles.
	15	+
	16	+![](2026-03-02-20-51-29.png)
	17	+
	18	+![](2026-03-02-20-51-45.png)
	19	+
	20	+### Worm Gearbox:
	21	+
	22	+These provide massive reduction in a small space (e.g., 60:1) and have a "self-locking" feature, meaning the output shaft won't turn unless the motor is spinning.
	23	+
	24	+
9	25
10	26	## common gearbox
11	27