DUEN Advertising Rover

The Fall 2022 cohort designed and assembled a rover that advertises DUEN at tabling events. It uses an ELEGOO Conqueror Robot Tank base with a 3D-printed weather protection shell and flag holder, LED strip with cascading pattern (Arduino + power bank), and a laminated DUEN flag. The rover supports line-tracking, obstacle-avoidance, and auto-follow modes via remote or phone app.

• —ELEGOO Conqueror Robot Tank base
• —Line-tracking, obstacle-avoidance, auto-follow modes
• —LED strip with Arduino, 3D-printed shell and flag holder
• —Phone or remote control
• —DUEN flag for visibility at tabling

Team members: Richmond Ballesteros, Sherri Chandra, Lauren Gee, Abubakr Hadwan, Matthew Suyetani

• —Solidworks
• —Arduino

• Nov 3Preliminary construction; main components assembled.
• Nov 4Dimensioned top covering with micrometer; completed CAD for weather protection and flag holder in Solidworks.
• Nov 5Finalized rover parts; tested movement paths and modes.
• Nov 8Gathered power components (breadboard, LEDs, resistors, power bank); dimensions for fit.
• Nov 9Coding, user manual, flag component, CAD drawings; camera biaxial bracket fixes.
• Nov 10Attached weather protector/flag holder; realigned connections; strengthened frame; instruction manual and slides.
• Nov 11Debugged LED code; mounted table to rover; finalized presentation and user manual.

• —Rover: ELEGOO Conqueror Robot Tank base; dual-channel DRV8835 driver, 7.4 V lithium pack, IR tracking. Dimensions (mm): 178.5 × 127 × 123; weight 1.64 kg.
• —CAD shell (weather protection): 163.68 × 134.03 × 10 mm. Legs 85 mm height. LED strip 330 mm. Flagpole 546.1 mm. Flag 177.8 × 157.48 mm.
• —CAD: Multiple iterations designed, dimensioned, manufactured; testing fit; attached to rover.
• —Flagpole: CAD design; switched to wooden pole after issues with 3D-printed version.
• —LED strip: Circuit between power bank, Arduino, and LED; cascading pattern; fitted onto rover.
• —Flag: Design sketch, member approval, printing and lamination.

• Problem: CAD dimensioning errors and 3D printer inaccuracy (hole dimensions).

  Solution: Iterated CAD; switched flagpole to wood.

• Problem: Flag printing and lamination issues.

  Solution: Adjusted design and process.

• Problem: Electrical wiring and circuitry.

  Solution: Breadboard and careful wiring; LED circuit with switch.

• —ELEGOO Conqueror Robot Tank Set
• —PLA (3D printing)
• —Power bank
• —LED strip
• —Breadboard
• —Wooden flagpole
• —Double-sided tape

• 01Startup: Plug USB wires into power bank (underside), press power bank button for LEDs. Toggle on/off on battery pack (left side). Use remote or phone to control.
• 02Modes: (1) Line-tracking – circular line mat, press 1 on remote or phone. (2) Obstacle-avoidance – press 2. (3) Auto-follow – press 3; follows obstacle within 20 cm or rotates 90° L/R then stops. (4) Infrared remote – arrow keys and 1–3 for modes.
• 03Battery: LED power bank charges via micro-USB; green LED while charging, off when complete. Rover battery life ~2 hours in line-tracking. Clear ~2 ft around rover before first power-on (sensors initialize, tracks move briefly).

• —Keep rover off high surfaces when powered. Disconnect power when working with electricity. Do not forcibly rotate servo by hand while power is on. Low battery can cause WiFi disconnect and camera stuck.

• Project presentation (PDF)
• Instruction manual (PDF)