Tech-dat/acturator-dat/acturator-dat.md
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- [[Humidifier-dat]]
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+
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+
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+## motor relevant
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+
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+- [[motor-driver-dat]] - [[motor-misc-dat]] - [[motor-dat]]
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+
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+
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+
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+
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+
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## Boards
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- [[SCU1080-dat]] - [[SCU1030-dat]]
Tech-dat/acturator-dat/motor-dat/motor-misc-dat/2025-12-30-14-36-25.png
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Tech-dat/acturator-dat/motor-dat/motor-misc-dat/motor-misc-dat.md
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+
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+# motor-misc-dat
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+
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+## Electrical Slip Ring
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+
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+![](2025-12-30-14-36-25.png)
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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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+- [[motor-dat]]
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materials-dat/metal-dat/metal-dat.md
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-
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# metal-dat
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+- [[brass-copper-dat]]
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+- [[Shaft-dat]]
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-- [[brass-copper-dat]]
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-
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-
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-
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-
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-
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-## metal soldering
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-
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-普通电烙铁的世界里：
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-铜是王，镀层是桥，铝是禁区。
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-
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-五、实操建议（很有用）
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-🔹 如果你想“让任何金属都好焊”
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-
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-👉 先镀锡 / 镀铜
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-
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-方法：
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-
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-化学镀
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-
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-电镀
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-
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-喷涂焊锡层
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-
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-
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-二、为什么“铜系最好焊”？
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-1️⃣ 氧化膜容易被助焊剂破坏
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-2️⃣ 锡对铜润湿性极好
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-3️⃣ 形成 Cu–Sn 金属间化合物
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-
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-→ 是真正“结合”
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-
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-
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-一、结论速览：哪些金属“能用电烙铁焊”？
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-
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-前提：普通电烙铁（≈300–400°C）+ 锡基焊料
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-
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-✅ 非常容易焊（标准焊接）
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-金属 可行性 说明
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-铜（Cu） ⭐⭐⭐⭐⭐ 最理想
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-黄铜 ⭐⭐⭐⭐⭐ 含铜高
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-紫铜 ⭐⭐⭐⭐⭐ 同上
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-镀锡铜 ⭐⭐⭐⭐⭐ 一碰就上锡
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-
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+## metal connection
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-## metal dust
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-一、从「源头」减少粉尘（最有效）
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-✅ 1️⃣ 选对切割方式（优先级很高）
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-| 切割方式 | 粉尘量 | 说明 |
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-| ------------- | --------- | --------------- |
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-| 冷切锯 / 带锯 | ⭐ 最少 | 切屑是颗粒/条状 |
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-| 手锯（钢锯） | ⭐⭐ 少 | 粉尘不飞 |
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-| 角磨机切割片 | ❌ 多 | 高速产生细粉 |
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-| 砂轮切割 | ❌❌ 非常多 | 粉尘 + 火花 |
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+### Metal Soldering
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+Context: standard soldering iron (~300–400°C) + tin-based solder.
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-## easy for cutting
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+Summary: Copper-based metals are the easiest to solder with a regular iron. Aluminum is difficult without special methods. If you need to make a hard-to-solder metal solderable, plating (tin or copper) is an effective approach.
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-| Material | Relative Cutting Ease | Tool Wear | Dust / Chips Produced | Heat Generation | Notes |
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-| --------------- | --------------------- | ---------- | --------------------- | --------------- | -------------------------------------------------- |
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-| Aluminum Alloy | ⭐⭐⭐⭐⭐ (Very Easy) | Low | Chips (few fine dust) | Low–Medium | Soft, cuts easily; may clog blades if RPM too high |
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-| Brass (黄铜) | ⭐⭐⭐⭐☆ (Easy) | Low–Medium | Clean chips | Medium | Free-cutting, stable; less grabbing than aluminum |
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-| Copper (紫铜) | ⭐⭐⭐☆☆ (Medium) | Medium | Long, sticky chips | Medium–High | Very ductile; tends to smear and stick to tools |
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-| Stainless Steel | ⭐⭐☆☆☆ (Hard) | High | Fine chips + dust | High | Tough, work-hardens; needs low speed and coolant |
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+Quick reference — which metals can be soldered with a regular iron:
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+- Very easy (standard soldering): Copper and high-copper alloys (brass, red copper, tin-plated copper).
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+Why copper alloys are best for soldering:
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+1. Oxide film is easy to break down with flux.
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+2. Tin wets copper extremely well.
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+3. Copper and tin form Cu–Sn intermetallics → a true metallurgical bond.
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+Practical suggestion: To make almost any metal solderable
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+- First plate with tin or copper (methods):
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+ - Chemical plating
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+ - Electroplating
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+ - Solder spray / tin coating
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+Useful tips
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+- Use appropriate flux for the base metal.
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+- Ensure mechanical cleaning (brushing/sanding) before soldering when possible.
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+- For aluminum, use special fluxes and/or aluminum-specific solders or plate the joint first.
74 34
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+---
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-## metal glue
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+## Metal Dust — Control at the Source
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-- [[glue-dat]]
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+Best strategy: reduce dust generation at the cutting stage.
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-四、粘得牢的关键步骤（比胶水本身还重要）
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-1️⃣ 打磨（必须）
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+Recommended cutting methods (from least to most dust):
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+| Cutting method | Dust amount | Notes |
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+| --------------------- | ----------- | ----- |
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+| Cold saw / band saw | ⭐ lowest | Produces chips/strips rather than fine dust |
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+| Hand saw (hacksaw) | ⭐⭐ low | Low airborne dust; slower |
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+| Angle grinder cutting | ❌ high | High speed creates fine powder |
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+| Cutting wheel / abrasive | ❌❌ very high | Produces fine dust and sparks; worst for airborne particles |
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-铝合金：用 400~600 号砂纸
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+Practical controls
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+- Prefer sawing with coolant or low-speed blade when possible.
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+- Use local exhaust ventilation and masks for abrasive cutting.
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+- Wet cutting or vacuum extraction reduces airborne dust.
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-不锈钢：同样打磨
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+---
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-目的：破坏氧化层 + 增加粗糙度
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+## Cutting: Ease, Tool Wear, and Chips
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-2️⃣ 脱脂（必须）
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+| Material | Relative Cutting Ease | Tool Wear | Dust / Chips Produced | Heat Generation | Notes |
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+| ---------------- | --------------------- | --------- | ------------------------ | --------------- | ----- |
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+| Aluminum alloy | ⭐⭐⭐⭐⭐ (Very easy) | Low | Chips (few fine dust) | Low–Medium | Soft; can clog blades at high RPM |
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+| Brass (黄铜) | ⭐⭐⭐⭐☆ (Easy) | Low–Medium| Clean chips | Medium | Free-cutting; stable |
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+| Copper (紫铜) | ⭐⭐⭐☆☆ (Medium) | Medium | Long, sticky chips | Medium–High | Ductile; tends to smear |
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+| Stainless steel | ⭐⭐☆☆☆ (Hard) | High | Fine chips + dust | High | Work-hardens; use low speed and coolant |
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-酒精 / 丙酮
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+Notes
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+- Match blade type and speed to material.
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+- Use coolant for steels and stainless to reduce heat and tool wear.
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+- Control chip evacuation to prevent blade clogging.
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-彻底擦干
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+---
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-3️⃣ 控制胶层厚度
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+## Metal Adhesives (Glue)
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-最佳厚度：0.1 ~ 0.3 mm
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+Key steps to get a strong bond—more important than the adhesive brand:
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-太薄强度下降
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+1. Surface preparation — sanding (required)
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+ - Aluminum alloys: use 400–600 grit sandpaper.
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+ - Stainless steel: also sand to remove oxide and increase surface roughness.
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+ - Purpose: remove oxide layer and increase mechanical keying.
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-太厚会脆
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+2. Degrease (required)
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+ - Use isopropyl alcohol or acetone.
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+ - Wipe thoroughly and let dry.
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-4️⃣ 固化时夹紧
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+3. Control adhesive layer thickness
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+ - Recommended thickness: 0.1–0.3 mm
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+ - Too thin → lower strength; too thick → more brittle
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-不要挤干胶
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+4. Clamp during curing
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+ - Clamp for alignment and pressure, but do not squeeze all adhesive out.
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+ - Ensure even contact and correct gap thickness.
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-只是定位、对齐
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+General adhesive notes
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+- Choose an adhesive suitable for the material and environment (temperature, load, chemical exposure).
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+- For metals, epoxy and structural acrylics are common choices.
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+---
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+## References
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+- [[AI]]
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power-dat/constant-current-dat/2025-12-30-02-29-26.png
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power-dat/constant-current-dat/2025-12-30-02-36-12.png
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power-dat/constant-current-dat/constant-current-dat.md
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+
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+# constant-current-dat
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+
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+
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+
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+## apps
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+
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+- [[LED-driver-dat]]
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+
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+- [[fan-dat]]
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+
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+
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+
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+![](2025-12-30-02-29-26.png)
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+
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+
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+
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+## current limit control
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+
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+![](2025-12-30-02-36-12.png)
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+
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+
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+Current Limiting Circuit with TL431
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+
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+Now, let's understand how the current limiting functionality works. In the schematic, you can see we have a 78L05 Voltage Regulator, which is an ultra-low-power regulator that is used to convert the input voltage to a constant 5V for the TL431 IC. The TL431 is a reference that is set to a constant current regulator mode with the help of a 71.5K resistor and a potentiometer. This reference is compared to the sense voltage from the output side of the resistor to limit the current. The circuit shown below is the TL431 circuit that is providing a constant current source to the op-amps.
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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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+
power-dat/power-dat.md
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- [[supervisory-dat]] - [[power-switch-dat]] - [[voltage-reference-dat]]
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+- [[constant-current-dat]]
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## power design workflow
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