Changes in 494aa9e: 1108

				Board-dat/Board-DAT.md
			
          @@ -260,6 +260,8 @@ MPC cable

           [[RPI-accesories-dat]] - [[MPCS007-dat]]

          +- [[MPC1108-dat]]

          +

           ### MSP

				Board-dat/MPC/MPC1108-dat/MPC1108-dat.md
			
          @@ -13,13 +13,28 @@ https://www.electrodragon.com/product/smart-fan-cooling-control-board-for-raspbe

           ### Fan control by three options 

          -- [[logic-gate-dat]]

          +- NAND gate use [[logic-gate-dat]] 

          +

          +- LM temperature Limit ALRAM (NAND_A)

          +- GPIO12 (NAND_B either gate )

          +- Manual switch (NAND_B either gate )

          +

          +

          +| A   | B   | output mosfet | fan |

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

          +| L   | L   | H             | ON  |

          +| L   | H   | H             | ON  |

          +| H   | L   | H             | ON  |

          +| H   | H   | L             | OFF |

           ![](2025-02-03-17-08-52.png)

           - [[Fan-dat]] drive by [[mosfet-dat]], only turn on or off

          +

          +

          +

           ### Temperature sensor 

           - [[LM75-dat]]

          @@ -38,6 +53,8 @@ Note when use this board and external 12V power supply to DC jack, you should NO

           - [[power-protection-dat]] - [[DFK-dat]]

          +- [[fan-dat]] == FAN 3007 

          +

           - [[dcdc-buck-dat]]

           - [[LDO-dat]]

				Chip-dat/TI-dat/TI-sensor-dat/LM75-dat/LM75-dat.md
			
          @@ -6,6 +6,28 @@

           https://www.analog.com/media/en/technical-documentation/data-sheets/lm75.pdf

          +## 🔧 Output Pin: OS (Overtemperature Shutdown)

          +

          +- The **OS pin** is the alarm output.

          +- It indicates when the temperature crosses a programmed **threshold**.

          +- Can be used to **trigger a fan, shut down a system, or raise an alert**.

          +

          +---

          +

          +## ⚙️ Output Behavior

          +

          +The output is **open-drain**, meaning:

          +

          +- It can **only pull low** (to GND)

          +- You need an **external pull-up resistor** to make it go high

          +

          +So in practice:

          +

          +| State             | OS Output (with pull-up) |

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

          +| No alarm         | **High** (pulled up)     |

          +| Over-temp alarm  | **Low** (active)         |

          +

           ## demo code 

           https://github.com/Edragon/RPI

				Tech-dat/Network-dat/WIFI-DAT.md
			
          @@ -38,8 +38,10 @@

           数据最终通过数据链路层+物理层传输到硬件网络，在数据链路层和物理层上的数据都是通过层层数据封装实现的。

          -- [[TCPIP-dat]]

          +- [[TCPIP-dat]] - [[TCPUDP-dat]]

           ## ref 

          +- [[ethernet-dat]]

          +

           - [[network-dat]]

          \ No newline at end of file

				Tech-dat/application-dat/fan-dat/2025-08-07-13-20-45.png
			
          Binary files /dev/null and b/Tech-dat/application-dat/fan-dat/2025-08-07-13-20-45.png differ

				Tech-dat/application-dat/fan-dat/fan-dat.md
			
          @@ -18,14 +18,17 @@

           This summary highlights the key differences in functionality and application based on fan wiring types.

          +## FAN 3007 

          +

          +![](2025-08-07-13-20-45.png)

          +

           ## order 

           - https://www.electrodragon.com/product/dc-brushless-fan-50x50x10mm/

          -- https://www.electrodragon.com/product/smart-fan-cooling-control-board-for-raspberry-pi/

          -

          +- [[MPC1108-dat]]

				Tech-dat/logic-dat/logic-gate-dat/logic-gate-dat.md
			
          @@ -2,7 +2,9 @@

           # logic gate 

          -## 74AHC1G125

          +## 74AHC1G125 = SINGLE BUFFER GATE WITH 3-STATE OUTPUT

          +

          +The 74AHC1G125 is a single non-inverting buffer/bus driver with a 3-state output. The output enters a high impedance state when a HIGH-level is applied to the output enable (OE) pin. The device is designed for operation with a power supply range of 2.0V to 5.5V.

           https://www.diodes.com/assets/Datasheets/74AHC1G125.pdf

          @@ -25,19 +27,40 @@ The NC7SZ00 is a single two−input NAND gate from onsemi’s Ultra−High Speed

           ![](2024-07-08-18-34-43.png)

          +## AND 

          +

          +### SN74AHC1G08

          +

          +SN74AHC1G08 Single 2-Input Positive-AND Gate

          +

          +The SN74AHC1G08 device is a single 2-input positive-AND gate. The device performs the Boolean function 

          +

          +    Y = A ● B 

          +    or Y = A + B 

          +

          +in positive logic.

          +

          +| A   | B   | Y   |

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

          +| H   | H   | H   |

          +| L   | X   | L   |

          +| X   | L   | L   |

          +

          +

          +| Input A | Input B | Output |

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

          +| 0       | 0       | 0      |

          +| 0       | 1       | 0      |

          +| 1       | 0       | 0      |

          +| 1       | 1       | 1      |

          -- NAND gate use [[logic-gate-dat]] 

          -- LM temperature Limit ALRAM (NAND_A)

          -- GPIO12 (NAND_B either gate )

          -- Manual switch (NAND_B either gate )

          -| A =temp. alarm | B = IO12 or switch | out |

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

          -| L              | L                  | H   |

          -| L              | H                  | H   |

          -| H              | L                  | H   |

          -| H              | H                  | L   |

          +| Term              | Meaning                                                              |

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

          +| AND gate          | Basic logic gate: output is 1 only if both inputs are 1              |

          +| Positive-AND gate | Same thing — "positive" means using standard logic levels (high = 1) |

          +| Negative logic    | Less common, where high voltage = logic 0                            |

...	...	@@ -260,6 +260,8 @@ MPC cable
260	260
261	261	[[RPI-accesories-dat]] - [[MPCS007-dat]]
262	262
	263	+- [[MPC1108-dat]]
	264	+
263	265
264	266	### MSP
265	267

...	...	@@ -13,13 +13,28 @@ https://www.electrodragon.com/product/smart-fan-cooling-control-board-for-raspbe
13	13
14	14	### Fan control by three options
15	15
16		-- [[logic-gate-dat]]
	16	+- NAND gate use [[logic-gate-dat]]
	17	+
	18	+- LM temperature Limit ALRAM (NAND_A)
	19	+- GPIO12 (NAND_B either gate )
	20	+- Manual switch (NAND_B either gate )
	21	+
	22	+
	23	+\| A \| B \| output mosfet \| fan \|
	24	+\| --- \| --- \| ------------- \| --- \|
	25	+\| L \| L \| H \| ON \|
	26	+\| L \| H \| H \| ON \|
	27	+\| H \| L \| H \| ON \|
	28	+\| H \| H \| L \| OFF \|
17	29
18	30
19	31	![](2025-02-03-17-08-52.png)
20	32
21	33	- [[Fan-dat]] drive by [[mosfet-dat]], only turn on or off
22	34
	35	+
	36	+
	37	+
23	38	### Temperature sensor
24	39
25	40	- [[LM75-dat]]
...	...	@@ -38,6 +53,8 @@ Note when use this board and external 12V power supply to DC jack, you should NO
38	53
39	54	- [[power-protection-dat]] - [[DFK-dat]]
40	55
	56	+- [[fan-dat]] == FAN 3007
	57	+
41	58	- [[dcdc-buck-dat]]
42	59
43	60	- [[LDO-dat]]

...	...	@@ -6,6 +6,28 @@
6	6	https://www.analog.com/media/en/technical-documentation/data-sheets/lm75.pdf
7	7
8	8
	9	+## 🔧 Output Pin: OS (Overtemperature Shutdown)
	10	+
	11	+- The OS pin is the alarm output.
	12	+- It indicates when the temperature crosses a programmed threshold.
	13	+- Can be used to trigger a fan, shut down a system, or raise an alert.
	14	+
	15	+---
	16	+
	17	+## ⚙️ Output Behavior
	18	+
	19	+The output is open-drain, meaning:
	20	+
	21	+- It can only pull low (to GND)
	22	+- You need an external pull-up resistor to make it go high
	23	+
	24	+So in practice:
	25	+
	26	+\| State \| OS Output (with pull-up) \|
	27	+\|------------------\|--------------------------\|
	28	+\| No alarm \| High (pulled up) \|
	29	+\| Over-temp alarm \| Low (active) \|
	30	+
9	31	## demo code
10	32
11	33	https://github.com/Edragon/RPI

...	...	@@ -38,8 +38,10 @@
38	38
39	39	数据最终通过数据链路层+物理层传输到硬件网络，在数据链路层和物理层上的数据都是通过层层数据封装实现的。
40	40
41		-- [[TCPIP-dat]]
	41	+- [[TCPIP-dat]] - [[TCPUDP-dat]]
42	42
43	43	## ref
44	44
	45	+- [[ethernet-dat]]
	46	+
45	47	- [[network-dat]]
...	...	\ No newline at end of file

...	...	@@ -18,14 +18,17 @@
18	18
19	19	This summary highlights the key differences in functionality and application based on fan wiring types.
20	20
	21	+## FAN 3007
	22	+
	23	+![](2025-08-07-13-20-45.png)
	24	+
21	25
22	26	## order
23	27
24	28	- https://www.electrodragon.com/product/dc-brushless-fan-50x50x10mm/
25	29
26		-- https://www.electrodragon.com/product/smart-fan-cooling-control-board-for-raspberry-pi/
27		-
28	30
	31	+- [[MPC1108-dat]]
29	32
30	33
31	34

...	...	@@ -2,7 +2,9 @@
2	2	# logic gate
3	3
4	4
5		-## 74AHC1G125
	5	+## 74AHC1G125 = SINGLE BUFFER GATE WITH 3-STATE OUTPUT
	6	+
	7	+The 74AHC1G125 is a single non-inverting buffer/bus driver with a 3-state output. The output enters a high impedance state when a HIGH-level is applied to the output enable (OE) pin. The device is designed for operation with a power supply range of 2.0V to 5.5V.
6	8
7	9	https://www.diodes.com/assets/Datasheets/74AHC1G125.pdf
8	10
...	...	@@ -25,19 +27,40 @@ The NC7SZ00 is a single two−input NAND gate from onsemi’s Ultra−High Speed
25	27	![](2024-07-08-18-34-43.png)
26	28
27	29
	30	+## AND
	31	+
	32	+### SN74AHC1G08
	33	+
	34	+SN74AHC1G08 Single 2-Input Positive-AND Gate
	35	+
	36	+The SN74AHC1G08 device is a single 2-input positive-AND gate. The device performs the Boolean function
	37	+
	38	+ Y = A ● B
	39	+ or Y = A + B
	40	+
	41	+in positive logic.
	42	+
	43	+\| A \| B \| Y \|
	44	+\| --- \| --- \| --- \|
	45	+\| H \| H \| H \|
	46	+\| L \| X \| L \|
	47	+\| X \| L \| L \|
	48	+
	49	+
	50	+\| Input A \| Input B \| Output \|
	51	+\| ------- \| ------- \| ------ \|
	52	+\| 0 \| 0 \| 0 \|
	53	+\| 0 \| 1 \| 0 \|
	54	+\| 1 \| 0 \| 0 \|
	55	+\| 1 \| 1 \| 1 \|
28	56
29		-- NAND gate use [[logic-gate-dat]]
30	57
31		-- LM temperature Limit ALRAM (NAND_A)
32		-- GPIO12 (NAND_B either gate )
33		-- Manual switch (NAND_B either gate )
34	58
35		-\| A =temp. alarm \| B = IO12 or switch \| out \|
36		-\| -------------- \| ------------------ \| --- \|
37		-\| L \| L \| H \|
38		-\| L \| H \| H \|
39		-\| H \| L \| H \|
40		-\| H \| H \| L \|
	59	+\| Term \| Meaning \|
	60	+\| ----------------- \| -------------------------------------------------------------------- \|
	61	+\| AND gate \| Basic logic gate: output is 1 only if both inputs are 1 \|
	62	+\| Positive-AND gate \| Same thing — "positive" means using standard logic levels (high = 1) \|
	63	+\| Negative logic \| Less common, where high voltage = logic 0 \|
41	64
42	65
43	66