Tech-dat/acturator-dat/motor-dat/torque-dat/torque-dat.md
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@@ -28,7 +28,38 @@ and stall torque is the maximum torque that the motor can deliver at zero speed.
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| Use Case | RC crawler, trail drive | High-torque RC drive |
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| Notes | High control, low speed | High torque, moderate speed |
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+## Torque
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+Meaning:
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+Torque = Force × Distance from the axis of rotation
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+10 N·m means a force of 10 Newtons is applied 1 meter away from the pivot point (or 5 N applied 2 meters away, etc.).
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+## Newtons
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+🧱 Real-World Examples of 10 N:
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+Lifting about 1 kg vertically against Earth's gravity.
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+Gravity exerts about 9.8 N of force on a 1 kg object.
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+So if you lift a 1-liter bottle of water (which weighs about 1 kg), you're applying roughly 10 N of force.
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+## 🔄 What is 100 kgf·cm?
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+kgf = kilogram-force
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+This is the force exerted by 1 kg of mass due to gravity (≈ 9.80665 newtons).
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+cm = centimeters, the distance from the axis of rotation.
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+So 100 kgf·cm means:
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+The torque generated by **a 100 kgf force acting 1 cm away from the axis**, or a 1 kgf force acting 100 cm away, and so on.
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## ref
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Tech-dat/tech-dat.md
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# tech
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-- [[power-dat]] - [[battery-dat]] - [[battery-charger-dat]] - [[dcdc-down-dat]] - [[dcdc-boost-dat]] - [[ldo-dat]] - [[battery-rechargerable-dat]] - [[BMS-dat]]
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+- [[power-dat]] - [[dcdc-down-dat]] - [[dcdc-boost-dat]] - [[ldo-dat]]
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+- [[battery-dat]] - [[battery-charger-dat]] - [[battery-rechargerable-dat]] - [[BMS-dat]] - [[18650-dat]]
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+
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- [[EDA-simulation-dat]] - [[EDA-dat]]
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- [[BOM-dat]] - [[cable-dat]]
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- [[sensor-dat]] - [[current-sensor-dat]] - [[current-transformer-dat]]
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-- [[acturator-dat]] - [[motor-dat]] - [[motor-driver-dat]]- [[motion-control-system-dat]]
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+- [[acturator-dat]] - [[motor-dat]] - [[motor-driver-dat]]- [[motion-control-system-dat]] - [[dc-gear-motor-dat]]
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mechanics-dat/mechanics-dat.md
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@@ -15,4 +15,6 @@
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- [[PCB-installation-dat]]
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+## ref
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+- [[tech-dat]]