ESP32-WROOM-32
Ev Regenerative Braking Prototype
개요
An educational desktop EV regenerative braking prototype controlled by an ESP32 DevKit V1 with power and RPM telemetry over USB.
Sakshi시스템 아키텍처
POWER
MCU
- POWER → MCUPowerPower supply
자재 명세서(BOM)
| 부품 번호 | 유형 | 부품 | 제조사 | 패키지 | 수량 | 데이터시트 | 매칭 |
|---|---|---|---|---|---|---|---|
| KH-TYPE-C-16P | POWER | USB-C Power Jack Power input | Kinghelm | USB16-TYPEC_8.94X7.35MM_SM | 1 | 매칭됨 | |
| ESP32-WROOM-32 | MCU | ESP32-WROOM-32 Main controller | Espressif Systems | Reel | 1 | 매칭됨 | |
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조립 가이드
3-5 hoursIntermediate
1
Procurement & Preparation
- Gather all BOM components including the KH-TYPE-C-16P USB-C Power Jack and ESP32-WROOM-32 DevKit V1, along with the prototype chassis, jumper wires, and pull-up resistors.
2
Hardware Assembly & Wiring
- Solder the KH-TYPE-C-16P USB-C Power Jack to the breakout board and connect the 5V and GND power lines to the VIN and GND pins of the ESP32-WROOM-32 module.
3
Firmware Setup
- Configure the Arduino IDE, install the ESP32 board support package, and write the firmware to read motor RPM, calculate regenerative braking energy, and stream telemetry over the USB serial interface.
4
Testing & Calibration
- Connect the prototype to a PC via USB-C, open the Serial Monitor at 115200 baud, spin the motor simulator, and verify real-time power and RPM telemetry data output.
문서
Ev Regenerative Braking Prototype
An educational desktop EV regenerative braking prototype controlled by an ESP32 DevKit V1 with power and RPM telemetry over USB.
Design Overview
| Item | Details |
|---|---|
| Product Type | Ev Regenerative Braking Prototype |
| Key Functions | Monitor system voltage, current, and power via INA219 sensor, Measure motor and axle RPM using A3144 Hall-effect sensor and neodymium magnets, Drive two 12V 200 RPM geared DC motors with regenerative capability, Provide wired USB telemetry and monitoring through ESP32 DevKit V1 |
| Power Source | Two 3.7V Li-ion batteries |
| Connectivity | USB |
| Size | Compact stacked PCB shield format mounted on the chassis |
| Environment | indoor |
| Difficulty | Intermediate |
| Est. Time | 3-5 hours |
System Architecture
Power Topology: USB-C 5V → MCU 3.3V LDO
Module List
| Module ID | Type | Name | Function | Voltage |
|---|---|---|---|---|
| POWER | POWER | USB-C Power Jack | Power input | 5V |
| MCU | MCU | ESP32-WROOM-32 | Main controller | 3.3V |
Design Schemes
Ev Regenerative Braking Prototype ★
Key IC selection
main MCU
- Need: Wi-Fi/BLE enabled dual-core processor with ample ADC and hardware pulse counter peripherals for telemetry and sensor logging
- Class: 32-bit Wi-Fi/Bluetooth SoC module
- Shortlist: ESP32-WROOM-32, ESP32-S3-WROOM-1
- Pick: Select ESP32-WROOM-32 for established DevKit ecosystem and sufficient peripheral count for dual Hall sensors and I2C telemetry.
Current/Power Monitor
- Need: High-side current and bus voltage monitoring with I2C interface for real-time regenerative braking power calculation
- Class: I2C digital power monitor IC
- Shortlist: INA219, INA226
- Pick: Select INA219 for integrated 12-bit ADC, onboard calibration registers, and direct support for bidirectional current sensing.
Motor Driver with Regneration Support
- Need: Dual-channel H-bridge driver rated for 12V DC motors supporting PWM speed control and regenerative braking energy dumping
- Class: High-current dual H-bridge DC motor driver
- Shortlist: BTS7960, L298N, MC33926
- Pick: Select MC33926 or BTS7960 based on continuous current requirements and built-in current feedback for safe regen transient handling.
Risk register
| ID | Area | Severity | Detail | Mitigation |
|---|---|---|---|---|
| r1 | power | high | Regenerative braking events can cause sudden voltage spikes (inductive kickback) on the 12V bus, potentially exceeding the absolute maximum ratings of the ESP32 and INA219. | Add TVS diodes, a robust bulk capacitor bank, and a zener clamp / brake chopper circuit on the 12V power rail to absorb regenerated energy safely. |
| r2 | emi | med | PWM switching of the dual 12V geared motors close to the A3144 Hall-effect sensors and ESP32 wiring can induce noise, causing false RPM trigger counts. | Use shielded twisted-pair wiring for Hall sensors, add RC low-pass filtering on digital input lines, and ensure proper star-grounding topology. |
Key Components
2/2 modules matched to real parts. See the BOM tab for the full component table.
USB-C Power Jack (KH-TYPE-C-16P)
The candidate matches the primary MPN (KH-TYPE-C-16P) and manufacturer (Kinghelm) for the requested USB-C Power Jack.
ESP32-WROOM-32 (ESP32-WROOM-32)
Candidate 1 (ESP32-WROOM-32D) is a direct variant and valid ordering code from Espressif Systems matching the primary MP
Build Summary
- Difficulty: Intermediate
- Estimated time: 3-5 hours
- Tools required: Soldering Iron, Solder Wire, Wire Strippers, Multimeter, Antistatic Mat, USB-C Cable
See the Build tab for the full step-by-step assembly guide.
Generated by YuanQi AI Design System · Query: EV regenerative car system using ESP32 DevKit V1 as main controller, INA219 current/voltage sensor for power measurement, A3144 Hall-effect sensor with two neodymium magnets for motor/axle RPM measurement, two 12V 200 RPM geared DC motors as drive motors, and two 3.7V Li-ion batteries as power source.