Board-dat/SCU/SCU1056-dat/SCU1056-dat.md
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The 365 diaphragm pump is a diaphragm pump that allows long-term idling. There are no mechanical parts and no wear in the pump body. Large water output, with self-priming function! It can be used as a water pump, fish tank water change, experimental model, inflatable swimming pool, tea set machine, oil pumping at grain and oil stations, car scrubbing, notebook water cooling, mineral water canning, etc. Air pump, aquarium gas and oxygen pump! Lower the voltage and use 3-5V voltage to make a computer heat circulation pump!
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+## analysis
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+
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+### 1. Basic Specifications
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+
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+| Parameter | Value | Notes |
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+|-----------|-------|-------|
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+| Operating Voltage | DC 12V | Standard for small pumps, easy to drive |
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+| No-load Current | 0.23 A | Low power consumption |
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+| Load Current | 0.45 A | Current under load |
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+| Max Flow Rate | 2–3 L/min | Moderate to small flow |
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+| Max Outlet Pressure | 1–2.5 kg/cm² (~0.1–0.25 MPa) | Determines spray height and distance |
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+| Max Head (Lift) | 1–2.5 m | Theoretical maximum water column height |
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+| Max Suction | 2 m | Maximum suction distance |
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+| Inlet/Outlet Diameter | Ø8 mm | Small diameter limits flow and spray force |
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+
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+---
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+
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+### 2. Spray Performance Analysis
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+
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+1. **Spray Height**:
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+ The maximum head of 1–2.5 m means the theoretical water column can reach about 2 m high, but this is under static conditions (ignoring nozzle resistance). Using a nozzle may slightly increase range but will not achieve long-distance spraying.
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+
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+2. **Pressure Capability**:
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+ Maximum pressure 1–2.5 kg/cm² (0.1–0.25 MPa) is low. This pump can only provide **light spraying**, unsuitable for high-pressure applications like water guns or fire-fighting spray.
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+
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+3. **Flow Rate Limitation**:
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+ 2–3 L/min is moderate to small. The spray stream will not be strong, suitable for **continuous small-flow spraying** (e.g., desktop fountains, plant watering), not for high-impact spraying.
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+
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+4. **Pump Type**:
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+ Being a diaphragm pump, it has good self-priming, dry-run tolerance, and can handle minor particulates, but the small pump size and low pressure limit spray force.
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+
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+---
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+
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+### 3. Conclusion
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+
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+- **Feasible**: Can be used for **small-scale spraying**, such as desktop water features, plant misting, or light water guns.
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+- **Not Feasible**: Not suitable for long-distance, high-pressure, or strong-impact spraying.
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+- **Recommendations**:
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+ - Use a small-diameter nozzle to concentrate the stream;
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+ - Consider series connection of pumps or using a high-pressure miniature pump for stronger spray;
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+ - Ensure suction distance does not exceed 2 m, otherwise the pump may fail to draw water.
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## ref
Chip-cn-dat/songle-dat/2025-09-22-17-42-18.png
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Chip-cn-dat/songle-dat/SRA-songle-relay.pdf
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Chip-cn-dat/songle-dat/SRD-songle-relay.PDF
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Chip-cn-dat/songle-dat/songle-dat.md
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- [[OPM1041-dat]]
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+- [[SRD-songle-relay.PDF]]
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+- [[SRA-songle-relay.PDF]]
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+SRD-12VDC-SL-A == S:Sealed / type L:0.36W / A:1 form A == 10A
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+
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+form A == 4pin
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+
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+
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+## SRA / SRD / SRU / SRS / SRC / SRSB relay
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+
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+| Model | Contact Configuration | Pins | Current |
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+|---------------------|----------------------|------|---------|
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+| SRA-05VDC-AL | 1 NO | 4 | 20A |
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+| SRA-12VDC-AL | 1 NO | 4 | 20A |
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+| SRA-24VDC-AL | 1 NO | 4 | 20A |
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+| SRA-05VDC-CL | 1 NO 1 NC | 5 | 20A |
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+| SRA-12VDC-CL | 1 NO 1 NC | 5 | 20A |
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+| SRA-24VDC-CL | 1 NO 1 NC | 5 | 20A |
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+| SRD-05VDC-SL-A | 1 NO | 4 | 10A |
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+| SRD-12VDC-SL-A | 1 NO | 4 | 10A |
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+| SRD-24VDC-SL-A | 1 NO | 4 | 10A |
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+| SRD-05VDC-SL-C | 1 NO 1 NC | 5 | 10A |
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+| SRD-12VDC-SL-C | 1 NO 1 NC | 5 | 10A |
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+| SRD-24VDC-SL-C | 1 NO 1 NC | 5 | 10A |
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+| SRU-12VDC-SL-A | 1 NO | 4 | 10A |
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+| SRU-12VDC-SL-C | 1 NO 1 NC | 5 | 10A |
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+| SRU-24VDC-SL-C | 1 NO 1 NC | 5 | 10A |
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+| SRS-05VDC-SL | 1 NO 1 NC | 6 | 3A |
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+| SRS-12VDC-SL | 1 NO 1 NC | 6 | 3A |
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+| SRS-24VDC-SL | 1 NO 1 NC | 6 | 3A |
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+| SRC-12VDC-SH | 2 NO 2 NC | 8 | 1A |
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+| SRSB-12VDC-SL-A | 1 NO | 4 | 5A |
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+| SRSB-24VDC-SL-A | 1 NO | 4 | 5A |
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+
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+
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+SRA
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+
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+![](2025-09-22-17-42-18.png)
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+
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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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+- [[relay-dat]]
PCB-dat/PCB-dat/EDA-dat/kicad-dat/kidcad-workflow-dat/kicad-pcb-dat/kicad-pcb-dat.md
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@@ -65,9 +65,16 @@ Hold Ctrl while dragging → ignores grid snap (lets you place anywhere).
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Useful when aligning visually or placing text/graphics
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+## text
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+## filled zone and polygon
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+
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+- click corner to create chamber
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+- duplicate the filled zone into polygon, and move to **Mask layer** to stop it being filled
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+
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+
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## import from other template projects
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app-dat/RC-apps-dat/Tank-dat/Tank-dat.md
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- [[tank-track-dat]]
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+
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+
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+
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+
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## tank platform 1
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- Each wheel has an independent suspension spring
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+
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+
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## 3D
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- tank track and [[robot-arm-dat]] - [3D model](https://cad.onshape.com/documents/74b490fd20a2a4c684736444/w/df7ed99939a49695aecaa97f/e/90154fe41bafe724913e360f?renderMode=0&uiState=68301af9be87bf505c7ca7d0)
app-dat/RC-apps-dat/Tank-dat/tank-track-dat/2025-09-22-15-42-03.png
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app-dat/RC-apps-dat/Tank-dat/tank-track-dat/2025-09-22-15-42-54.png
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app-dat/RC-apps-dat/Tank-dat/tank-track-dat/2025-09-22-15-45-02.png
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app-dat/RC-apps-dat/Tank-dat/tank-track-dat/tank-track-dat.md
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# tank-track-dat
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+
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+## Tracked Vehicle Powertrain Components
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+
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+A tracked vehicle uses continuous tracks instead of wheels to move over difficult terrain. Its powertrain consists of several key components that transmit engine power to the tracks efficiently:
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+
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+1. **Engine (Power Source)**
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+ - Provides mechanical power, usually via an internal combustion engine or electric motor.
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+ - The engine’s output is typically transmitted through a **transmission** or **gearbox** to control speed and torque.
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+
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+2. **Transmission / Gearbox**
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+ - Adjusts the engine output to the proper torque and speed for the tracks.
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+ - May include forward/reverse gears for directional control.
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+ - Can be **hydrostatic**, **mechanical**, or **electric drive** depending on vehicle design.
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+
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+3. **Final Drive**
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+ - Converts torque from the transmission into rotation for the **drive sprockets**.
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+ - Usually contains reduction gears to increase torque and reduce track speed.
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+ - Protects the drivetrain from overloads.
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+
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+4. **Drive Sprocket (Active Wheel / Propulsion Wheel)**
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+ - Located at one end of the track (front or rear, depending on design).
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+ - Engages with the track’s drive holes to pull or push the track.
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+ - Responsible for **propelling the vehicle**.
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+
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+5. **Idler Wheel (Tension or Guide Wheel)**
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+ - Located opposite the drive sprocket.
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+ - Guides the track and maintains proper tension.
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+ - Can be adjusted to prevent track sagging or slipping.
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+
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+6. **Road Wheels / Rollers (Supporting Wheels)**
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+ - Distributed along the length of the track frame.
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+ - Support the vehicle weight and allow smooth track motion.
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+ - Reduce friction between the track and vehicle body.
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+
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+7. **Return Rollers (Optional)**
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+ - Located on top of the track frame.
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+ - Support the upper run of the track, preventing sagging and improving stability.
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+
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+8. **Track / Continuous Band**
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+ - Flexible but strong metal or rubber assembly.
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+ - Encircles the drive sprocket, idler, and road wheels.
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+ - Transfers propulsion to the ground and distributes weight over a large area.
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+
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+
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+**Summary of Roles:**
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+
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+| Component | Role |
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+| -------------- | ---------------------------------------- |
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+| Engine | Provides power |
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+| Transmission | Adjusts speed and torque |
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+| Final Drive | Converts torque to drive sprocket |
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+| Drive Sprocket | Propels the track |
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+| Idler Wheel | Guides track, maintains tension |
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+| Road Wheels | Support weight, reduce friction |
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+| Return Rollers | Support upper track run |
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+| Track | Provides traction and distributes weight |
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+
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+
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+![](2025-09-22-15-42-03.png)
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+
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+![](2025-09-22-15-42-54.png)
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+
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+
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+![](2025-09-22-15-45-02.png)
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+
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+
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## ✅ When Tank Tracks Are Better
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- **Soft Terrain** (sand, mud, snow):
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- Tracks distribute weight over a larger surface, preventing sinking.
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## 🔍 Summary Table
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-| Feature | Tank Tracks | Wheels |
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-|------------------|----------------------------------|----------------------------------|
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-| Traction | Excellent on rough terrain | Good on hard surfaces |
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-| Speed | Slower | Faster |
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-| Efficiency | Lower (more friction) | Higher |
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-| Terrain Handling | Superior on soft/uneven ground | Best on smooth/hard ground |
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-| Weight Support | High | Moderate |
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-| Maintenance | More complex and expensive | Easier and cheaper |
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+| Feature | Tank Tracks | Wheels |
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+| ---------------- | ------------------------------ | -------------------------- |
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+| Traction | Excellent on rough terrain | Good on hard surfaces |
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+| Speed | Slower | Faster |
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+| Efficiency | Lower (more friction) | Higher |
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+| Terrain Handling | Superior on soft/uneven ground | Best on smooth/hard ground |
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+| Weight Support | High | Moderate |
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+| Maintenance | More complex and expensive | Easier and cheaper |
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## BOMS
power-dat/AC-Mains-dat/ACDC-dat/ACDC-dat.md
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+TOP254EN == Enhanced EcoSmart, Integrated Off-Line Switcher with Advanced Feature Set and Extended Power Range == TOPSwitch-HX is a highly integrated monolithic off-line switcher IC designed for off-line power supplies.
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+
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+
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+
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## ref
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- [[ACDC]]