Chip-dat/richtek-dat/richtek-dat.md
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# richtek-dat
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+- [[dcdc-down-dat]]
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+
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## RT9080
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- RT9080 - 2μA IQ, 600mA Low-Dropout Linear Regulator
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-![](2024-12-26-15-23-57.png)
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+![](2024-12-26-15-23-57.png)
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+
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+
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+## RT8279
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+
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+5A, 36V, 500kHz Step-Down Converter
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+
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+https://www.richtek.com/assets/product_file/RT8279/DS8279-01.pdf
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+
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+### Features
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+
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+- 5A Output Current
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+- Internal Soft-Start
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+- 110mΩ Internal Power MOSFET Switch
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+- Internal Compensation Minimizes External Parts Count
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+- High Efficiency up to 90%
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+- 25μA Shutdown Mode
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+- Fixed 500kHz Frequency
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+- Thermal Shutdown
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+- Cycle-by-Cycle Over Current Protection
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+- Wide 5.5V to 36V Operating Input Range
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+- Adjustable Output Voltage from 1.222V to 26V
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+- Available In an SOP8 (Exposed Pad) Package
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+- RoHS Compliant and Halogen Free
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+
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+
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+
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+
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+
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+
Chip-dat/toshiba-dat/TB6612-dat/TB6612-dat.md
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- [[motor-driver-dat]]
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+## Features
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+
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+- Single channel continuous drive current 1.2A
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+- Single channel maximum peak current 3.2A
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+- Input power supply range 5.5-15V
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+- Protection functions: **short circuit protection, over-temperature protection**
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+- Other functions: power supply voltage sampling, encoder interface
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+- Control signal pins: to control one motor's forward and reverse rotation, 1 PWM channel and 2 general IOs are needed
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+- Logic or reference power supply range: no logic power supply needed, reference voltage uses the built-in regulated 5V output
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+- Function: can simultaneously drive 4 motors for forward/reverse rotation with stepless speed regulation, **PWM dead zone is much smaller than L298N**
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+
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+
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+## ref
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+
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+- [[dcdc-down-dat]]
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+
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+- [[toshiba-dat]] - [[TB6612]]
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+
Tech-dat/acturator-dat/motor-dat/DC-Gear-Motor-dat/DC-Gear-Motor-dat.md
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# DC-Gear-Motor-dat
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+## driver
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+
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+- [[TB6612-dat]] - [[L298-dat]]
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+
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+
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# reduction-gear-motor-dat
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- [[encoder-dat]]
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+- [[TT-motor-dat]]
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+
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## Apps and Specs Selection
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Tech-dat/acturator-dat/motor-dat/DC-motor-dat/DC-motor-dat.md
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| **775** | ~70 mm length | 12V – 24V | ~150–350 W | High-power drills, CNC, mobility projects |
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| **895** | ~80 mm length | 12V – 36V | ~200–500 W | High torque, heavy loads |
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-- more powerful motors - [[BLDC-motor-da[[DC-Gear-Motor-dat]]dat]]
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+- more powerful motors - [[BLDC-motor-dat]] - [[DC-Gear-Motor-dat]]
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+
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+## 1. 45T / 55T Motors
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+
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+- **"T" = Turns** of wire on the motor armature.
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+- **Higher T (e.g., 55T)** = **More torque, lower speed**.
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+- **Lower T (e.g., 12T)** = **Higher speed, lower torque**.
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+- Typically **540-size** brushed motors.
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+- Commonly used in **RC crawling/trailing** for torque and control.
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+- A **45T motor** has **45 wraps (turns)** of copper wire around each pole of the armature.
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+- The number of turns affects the **motor's speed and torque**.
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+
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+Series = 19T / 21T / 27T / 35T / 45T / 55T / 60T / 80T
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+
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+### Summary Table
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+
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+| Spec | 45T / 55T Motor | 130 / 230 Motor |
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+| ------ | --------------------- | ------------------------- |
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+| Type | Brushed RC Motor | Toy motor |
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+| Size | 540-class | Small can-type |
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+| Torque | High (esp. 55T) | Low |
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+| Speed | Low (esp. 55T) | Moderate |
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+| Usage | RC crawling, trailing | Toys, fans, small gadgets |
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+
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+
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+### 🔧 Approximate Torque Value
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+- **Torque (stall):** ~300 to 400 g·cm (gram-centimeter)
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+- **At 7.2V to 7.4V (common RC voltage)**
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+
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+> ⚠️ Note: This is an estimate. Some high-end 45T motors may produce more torque.
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+
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+### 📊 Comparison Table (Typical RC Motors at 7.2V)
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+
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+| Motor Type | Turns | Torque (g·cm) | Speed (RPM) |
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+| ---------- | ----- | ------------- | -------------- |
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+| Racing | 12T | ~100–150 | ~30,000–35,000 |
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+| Balanced | 27T | ~200–250 | ~15,000–20,000 |
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+| Torque | 45T | ~300–400 | ~9,000–11,000 |
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+| Crawler | 55T | ~400–500 | ~7,000–9,000 |
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+
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+- [[torque-dat]]
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## 📊 Size Comparison Table
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## 🔄 3. 1000W+ Brushed DC Motors – ✅ *Direct power jump*
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-| Motor | Voltage | Power | Notes |
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-|--------------|---------|-----------|------------------------------------|
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-| **MY1020** | 24–48V | 500–1000W | E-scooters, carts, heavy DIY use |
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-| **XYD-16/13**| 36–60V | 1000W+ | High torque, brushed, affordable |
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+| Motor | Voltage | Power | Notes |
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+| ------------- | ------- | --------- | -------------------------------- |
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+| **MY1020** | 24–48V | 500–1000W | E-scooters, carts, heavy DIY use |
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+| **XYD-16/13** | 36–60V | 1000W+ | High torque, brushed, affordable |
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![](2025-05-13-02-44-12.png)
Tech-dat/acturator-dat/motor-dat/TT-motor-dat/TT-motor-dat.md
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+# TT-motor-dat
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+A TT motor is a type of DC motor commonly used in hobbyist robotics and DIY electronics projects. It's characterized by its yellow plastic gearbox and is often paired with a plastic wheel.
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+
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+## Key features mentioned include:
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+
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+- Gearbox: It typically has a plastic gearbox, often with a 1:48 or 1:120 gear ratio.
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+- Voltage: Operates at voltages like 3V, 5V, or 6V.
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+- Current:
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+ - No-load current is around 150mA at 3V and 170mA at 6V.
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+ - Stall current can be around 0.8A at 3V and up to 1.3A or 2.8A at 6V depending on the specific model.
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+- Speed: No-load speed varies with voltage and gear ratio (e.g., 90-100 RPM at 3V, 180-250 RPM at 6V).
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+- Torque: Stall torque is also voltage and gear ratio dependent (e.g., 0.8 kg.cm).
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+- Shaft: Often has a dual shaft design.
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+- EMF: Some versions may have built-in electromagnetic shielding or capacitors for EMF suppression.
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+
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+## ref
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+
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+- [[dc-gear-motor-dat]]
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Tech-dat/acturator-dat/motor-dat/torque-dat/torque-dat.md
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![](2023-12-04-18-30-10.png)
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+
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+# Torque Comparison: 45T Brushed Motor vs MG540 Brushed Motor
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+
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+| Spec | 45T Brushed Motor | MG540 Brushed Gear Motor |
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+| --------------- | ----------------------- | --------------------------- |
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+| Motor Size | 540-class ?? | 540-class ?? |
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+| Turns | 45T | Unknown (not T-rated) |
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+| Torque | ~400 g·cm | 2.6 kgf·cm |
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+| Torque (kgf·cm) | ~0.4 kgf·cm | 2.6 kgf·cm |
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+| Torque (N·m) | ~0.0392 N·m | ~0.255 N·m |
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+| Speed (RPM) | ~9,000–11,000 RPM | Likely lower |
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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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+
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+
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+
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## ref
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- [[motor-dat]]
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Tech-dat/power-dat/DC-dat/DCDC-dat/dcdc-down-dat/dcdc-down-dat.md
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- [[OPM1192-dat]] - [[OPM1152-dat]]
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+- [[richtek-dat]]
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+
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### LM2596 = input 3~40V
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- [[OPM1003-dat]] - [[LM2596-dat]] ADJ Display version
app-dat/3d-printer-dat/3d-printer-dat.md
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- [[marlin-dat]]
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+## materials
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+- PETG
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+- PLA
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## ref
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app-dat/RC-dat/Tank-dat/Tank-dat.md
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+# Tank-dat
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+
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+
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+- [[dc-gear-motor-dat]]
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+
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+## ref
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+
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+- [[RC]] - [[tank]]
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app-dat/RC-dat/Tank-dat/markus-tank-dat/markus-tank-dat.md
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+# markus-rover-dat
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+
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+- [FPV-Rover V2.0 (RC Tank)](https://www.thingiverse.com/thing:2952852)
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+- [youtube](https://www.youtube.com/watch?v=dpUSdjNppN0)
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+- https://www.instructables.com/FPV-Rover-V20/
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+
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+## printed parts
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+
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+- 2x main cog front
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+- 2x main cog rear (needs support)
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+- 16x small cog
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+- 1x body (needs support)
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+- 2x outer frame
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+- 2x big bevel gear (use 4:1 for less heat and more torque)
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+- 2x small bevel gear (I recommend strong filament like Nylon) (use 4:1 for less heat and more torque)
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+- 2x motor mounting bracket
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+- 2x ESC mount
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+- 1x inner frame left (or inner frame left high)
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+- 1x inner frame right (or inner frame right high)
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+- 1x front cover (needs support)
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+- 1x rear cover
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+- 64x tank track
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+- 64x rubber track for tank track
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+
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+## ordered parts
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+
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+
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+
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+## knowledge
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+
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+- [[3d-printer-dat]]
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+
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+- [[dc-motor-dat]] - [[tank-track-dat]] - [[ESC-dat]]
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+
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+- cog == gear
app-dat/RC-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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+
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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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+- **Uneven Terrain** (rocks, slopes, obstacles):
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+ - Tracks provide better grip and stability.
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+- **Heavy Loads**:
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+ - Tracks can support and move heavier equipment with more traction.
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+
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+## ✅ When Wheels Are Better
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+- **Hard, Flat Terrain** (pavement, concrete):
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+ - Wheels are faster and more energy-efficient.
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+- **Speed & Efficiency**:
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+ - Wheeled systems are usually lighter and less power-hungry.
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+- **Maintenance & Cost**:
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+ - Wheels are simpler, cheaper, and easier to repair.
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+
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+
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+## 🔍 Summary Table
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+
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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 |
app-dat/RC-dat/rover-dat/rover-dat.md
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## 3D printed
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-- [FPV-Rover V2.0 (RC Tank)](https://www.thingiverse.com/thing:2952852) - [youtube](https://www.youtube.com/watch?v=dpUSdjNppN0) - https://www.instructables.com/FPV-Rover-V20/ -
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-
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+- [[markus-rover-dat]]
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## board
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## ref
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-- [[rc-car]]
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+- [[rc-car]]
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+
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+- [[maker]]
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