2. PERTINENT INFORAMTION - W-Div-Engg-Exploration-Odd-2026-27/Repo-11 GitHub Wiki

2. PERTINENT INFORMATION


Reference Links & Benchmarks


Bill of Materials & Procurement List (Polar Tracker Fan)

Category Component & Specification Function in Project Supplier Link Est. Price (INR)
Sensing & Vision ESP32-S3-CAM ModuleOV2640 camera, Wi-Fi/BLE, dual-core Face/person detection, centroid tracking, main logic compute Robu.in ₹750 – ₹950
Distance Ranging VL53L5CX Time-of-Flight Sensor8x8 multizone ranging breakout Millimeter-accurate distance measurement for dynamic fan speed modulation Robu.in ₹850 – ₹1,200
Pan Actuator MG996R Metal Gear Servo MotorHigh torque (10–11 kg-cm) 180° horizontal yaw/pan rotation of the entire fan assembly Robu.in ₹320 – ₹380
Tilt Actuator MG90S Micro Metal Gear ServoCompact form factor (1.8–2.2 kg-cm) Vertical pitch elevation targeting (-15° to +35°) Robocraze ₹160 – ₹220
Airflow Drive 120mm 12V DC Axial FanBrushless, 4-pin PWM controllable Airflow generation through protective finger shroud Amazon.in ₹250 – ₹450
Power Conversion LM2596 DC-DC Buck ConverterAdjustable step-down module (3A max) Steps down 12V DC input to stable 5V for servos and logic boards Robu.in ₹70 – ₹110
Power Supply 12V 3A DC Adapter5.5x2.1mm center-positive barrel plug Supplies mains DC power to the fan, actuators, and logic stages Amazon.in ₹250 – ₹400
User Feedback WS2812B RGB 8-LED Ring5050 NeoPixel circular breakout Visual tracking lock status, standby indication, and gesture feedback Robu.in ₹90 – ₹140
Mechanical Bearing Lazy Susan Thrust Ball Bearing80mm – 100mm outer diameter ring Supports axial weight and eliminates radial cantilever load on pan servo Amazon.in ₹180 – ₹280
Chassis Parts 3D-Printed PLA / PETG Filament1 kg spool (~350g used) Base housing, pivot arms, fan cowl, and narrow-aperture (<7mm) safety grille Robu.in ₹700 – ₹900
Base Ballast Steel Base Weight Plate~300g flat disc ballast Lowers center of gravity to prevent tipping during rapid 180° sweeps Local Hardware ₹50 – ₹100
Hardware & Wiring M3 Hardware & Jumper WiresScrews, nuts, DC socket, silicon feet Structural assembly and power/signal distribution harness Robu.in ₹200 – ₹300

Procurement & Budget Summary

  • Total Estimated Prototype Cost: ₹3,870 – ₹5,480 INR
  • Budget Compliance: Meets the user preference target of under ₹5,000 INR and stays well within the academic limit of under ₹10,000 INR.
  • Component Accessibility: Uses standard off-the-shelf parts and standard 3D printing without specialized tooling.