Board-dat/SMO/smo1040-dat/smo1040-dat.md
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# smo1040-dat
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-10PCs Mercury Switch 3mm One-Direction
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+[10PCs Mercury Switch 3mm One-Direction](https://www.electrodragon.com/product/mercury-switch/)
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-https://www.electrodragon.com/product/mercury-switch/
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+
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+- [[sensor-tilt-switch-dat]]
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+
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## ref
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- [[SMO1040]]
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Tech-dat/Sensor-dat/sensor-motion-dat/sensor-hall-dat/sensor-hall-dat.md
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# sensor-hall-dat
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+- [[sensor-hall-swtich-dat]]
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+
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+
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WCS2800 - Hall Effect Base Linear Current Sensor
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Tech-dat/Sensor-dat/sensor-motion-dat/sensor-hall-dat/sensor-hall-swtich-dat/sensor-hall-swtich-dat.md
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+
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+# hall-switch-dat
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+
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+- **Omnipolar Operation (North or South Pole)**
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+
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+AH1911/AH1921
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+
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+ULTRA-LOW POWER DIGITAL OMNIPLOAR HALL-EFFECT SWITCH
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+
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+https://www.diodes.com/datasheet/download/AH1911.pdf
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+
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+The AH1911/AH1921 is an ultra-low power digital Omnipolar Hall Effect switch IC from Diodes broad Hall Effect switches family.
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+
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+Thanks to the hibernating clocking system, the average supply current is only 1.6μA at 3V, which makes the AH1911/AH1921 perfectly fit battery-powered consumer products, Gas or water meter, smoke detectors and IoT devices.
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+
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+The wider range of supply voltage (1.6V to 5.5V) extends battery operating time and supports low voltage system microcontrollers, which provides great flexibility for system design.
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+
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+The advanced chopper stabilized design provides superior stability on switch operating point over temperature and supply voltage. The high ESD level up to 6kV helps to improve the system robustness.
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+
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+
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+
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+## ref
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+
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+- [[switch-dat]]
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Tech-dat/Sensor-dat/sensor-motion-dat/sensor-tilt-switch-dat/2025-11-28-19-39-51.png
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Tech-dat/Sensor-dat/sensor-motion-dat/sensor-tilt-switch-dat/sensor-tilt-switch-dat.md
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+
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+
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+# sensor-tilt-switch-dat
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+
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+
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+## mercury type tilt switch sensor
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+
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+- [[smo1040-dat]]
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+
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+
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+## Reed Tilt Switch Sensor
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+
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+![](2025-11-28-19-39-51.png)
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+
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+### Structure
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+
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+✅ **Described Structure**
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+
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+- Two metal reed springs (contact pieces) placed close together inside a glass tube → This is a standard Reed-type tilt switch
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+- Operating principle:
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+ - When tilted to a certain angle, the two metal reed springs move closer or separate
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+ - This creates a **closed** or **open** circuit
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+
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+Usually a small amount of conductive liquid or metal particles is added inside, but this one appears to be the simplest dual metal reed contact design.
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+
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+---
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+
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+### Working Principle (Without Ball Bearings)
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+
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+✅ **How Reed Switch Works**
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+
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+- **Basic principle:**
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+ - Two nickel-iron metal strips sealed inside a glass tube
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+ - Angle change → Natural micro-displacement of the reeds → Contact or separation
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+ - Used for tilt detection
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+
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+- **Characteristics:**
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+ - Extremely simple design
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+ - Ultra-low cost tilt angle sensor
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+
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+## Ball Tilt Switch Sensor
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+
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+### Structure
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+
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+**Distinctive Characteristics:**
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+
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+- Transparent glass tube
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+- Metal pins extending from both ends
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+- Contains a metal ball or metal column inside
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+- When tilted to a certain angle, the ball rolls to close or open the contact
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+
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+### Working Principle
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+
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+📌 **How It Works**
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+
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+When the switch is tilted beyond a certain angle (typically 10° ~ 45°), the internal metal ball will:
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+
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+- **Contact both electrodes** → Circuit **closes** (conducts)
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+- **Leave the electrodes** → Circuit **opens** (no contact)
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+
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+This is the simplest angle detection switch design.
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+
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+### Applications
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+
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+📌 **Common Uses:**
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+
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+- Anti-tipping devices
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+- Night light sensors
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+- Remote control toys
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+- Battery protection devices
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+- Alarm systems
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+
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+### Important Notes
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+
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+❗️ **Mercury vs. Ball Switch**
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+
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+- If the interior contains **silver liquid** (resembling mercury), it would be an early **mercury switch**
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+- However, the image shown here appears to be a **ball-type switch**, not a mercury switch
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+
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+
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+
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+
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+
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+## app
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+
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+- [[hot-air-station-dat]]
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+
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+
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+
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+## ref
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+
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+- [[sensor-dat]] - [[switch-dat]]
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Tech-dat/application-dat/fan-dat/fan-dat.md
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+## apps
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+
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+- [[hot-air-station-dat]]
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+
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+
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+
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## small fan control
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- [[RPI-CM4-expansion-board-dat]]
Tech-dat/interactive-dat/switch-dat/hall-switch-dat/hall-switch-dat.md
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-
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-# hall-switch-dat
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-
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-- **Omnipolar Operation (North or South Pole)**
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-
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-AH1911/AH1921
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-
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-ULTRA-LOW POWER DIGITAL OMNIPLOAR HALL-EFFECT SWITCH
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-
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-https://www.diodes.com/datasheet/download/AH1911.pdf
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-
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-The AH1911/AH1921 is an ultra-low power digital Omnipolar Hall Effect switch IC from Diodes broad Hall Effect switches family.
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-
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-Thanks to the hibernating clocking system, the average supply current is only 1.6μA at 3V, which makes the AH1911/AH1921 perfectly fit battery-powered consumer products, Gas or water meter, smoke detectors and IoT devices.
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-
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-The wider range of supply voltage (1.6V to 5.5V) extends battery operating time and supports low voltage system microcontrollers, which provides great flexibility for system design.
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-
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-The advanced chopper stabilized design provides superior stability on switch operating point over temperature and supply voltage. The high ESD level up to 6kV helps to improve the system robustness.
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-
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-
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-
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-## ref
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-
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-- [[switch-dat]]
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Tech-dat/interactive-dat/switch-dat/switch-dat.md
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- [[KCD4-dat]] - [[KCD3-dat]] - [[KCD1-dat]]
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-- [[hall-switch-dat]]
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+- [[sensor-hall-switch-dat]]
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+
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+- [[sensor-tilt-switch-dat]] - [[sensor-dat]]
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+
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tools-dat/soldering-tools-dat/hot-air-station-dat/2025-11-28-19-11-41.png
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tools-dat/soldering-tools-dat/hot-air-station-dat/hot-air-station-dat.md
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- temperature sensor read wrong
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+
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+## hot air handle
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+
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+- [[high-voltage-warn-dat]]
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+
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+yellow wires 220VAC
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+
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+3V and 5V DC also on board for [[fan-dat]], etc
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+
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+![](2025-11-28-19-11-41.png)
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+
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+
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+
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## ref
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-- [[soldering-tools-dat]]
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+- [[hot-air-station]]
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+
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+- [[soldering-tools-dat]] - [[fab-workspace-dat]]
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tools-dat/soldering-tools-dat/soldering-tools-dat.md
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# soldering-tools-dat
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-- [[soldering-iron-dat]] - [[soldering-tip-dat]]
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+- [[soldering-iron-dat]] - [[soldering-tip-dat]] - [[soldering-station-dat]]
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- [[preheat-bed-dat]]
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- [[hot-air-station-dat]]
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+
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+
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## soldering rack
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- [[PSOS033-dat]] - [[PSOS010-dat]]