How to Make a Mini Cardboard DJ Truck
Construct a working mini DJ sound truck model using cardboard body panels, a tiered speaker wall, integrated Bluetooth audio, and synchronized mini LED lighting rigs.
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🧰 Required Tools & Equipment
- ✓ Utility hobby knife
- ✓ Hot glue gun
- ✓ Steel ruler
- ✓ Wire strippers
- ✓ Soldering iron with solder
- ✓ Compass or circle cutter
📦 Materials & Supplies
- ✓ Double-wall corrugated cardboard
- ✓ 5V mini Bluetooth speaker driver
- ✓ 5V RGB mini LED strip with controller
- ✓ 18650 rechargeable battery pack with on/off switch
- ✓ Two 5mm steel axle rods with 4 rubber toy wheels
- ✓ Matte silver and black acrylic paint
⚠️ Safety Checkpoints & Warnings
- • Always draw the utility knife blade away from your body against a rigid steel straightedge to prevent slips.
- • Disconnect the battery pack before soldering any LED or audio connections to prevent accidental short circuits.
- • Keep hot glue off skin and place the glue gun on a dedicated heat-resistant stand during assembly.
📋 Step-by-Step Guide (6 Steps)
Cut and Assemble the Rolling Chassis
Measure and cut a 30 cm by 12 cm rectangle from dense corrugated cardboard for the base platform. Punch aligned holes through two cardboard underside crossbeams, slide the 5mm steel axle rods through, and press-fit the rubber wheels onto the outer ends. Verify that the chassis rolls smoothly across a flat surface without wobbling or rubbing.
- • A rigid cardboard platform resting on four freely spinning wheels
- • Axles positioned perfectly parallel to one another
- • Misaligning axle holes, causing the chassis to veer sharply to one side
Construct the DJ Truck Cab
Cut cardboard templates for the front hood, angled windshield frame, doors, and roof using standard scale truck proportions. Fasten the panels to the front third of the chassis using high-temperature hot glue along the interior seams. Cut out front grille openings and insert clear plastic or silver card backing to simulate headlights and radiator mesh.
- • A fully enclosed front cab rigidly bonded to the forward 10 cm of the chassis
- • Clean 90-degree corner joints with internal glue fillets
- • Applying glue to the exterior seams, resulting in visible glue squeeze-out
Fabricate the Rear DJ Sound Wall Structure
Cut a 20 cm tall vertical backboard matched to the chassis width, along with two triangular side supports to create a tiered audio tower. Use a compass cutter to cut circular speaker openings across the face plate in a 2x3 or 2x4 grid layout. Reinforce the rear of the tower with vertical cardboard ribs so it does not flex under the weight of the electronics.
- • A multi-tiered speaker frame with clean circular cutouts
- • Stable vertical tower standing perpendicular to the chassis
- • Tearing the cardboard edges by forcing a dull compass blade through dense fluting
Mount the Speaker Driver and Acoustic Cones
Secure the active 5V mini Bluetooth speaker unit directly behind the center cutout using hot glue around the rim to create an acoustic seal. Craft decorative dummy speaker cones from black cardstock and inverted plastic bottle caps for the remaining openings to complete the wall look. Paint the entire outer tower silver and black, taking care not to coat the speaker diaphragm.
- • Active speaker seated firmly behind the designated aperture
- • Uniform speaker wall appearance across both active and decorative ports
- • Getting glue on the active speaker's moving cone or surround, muffling the audio
Wire and Route LED Lighting and Power System
Run 5V mini RGB LED strips along the top truss, speaker frame perimeters, and under the chassis edges. Solder the positive and negative power leads of the LED strip and the Bluetooth speaker module in parallel to the switched 18650 battery holder leads. Secure all loose wiring underneath the chassis deck using hot glue tack points to prevent snags.
- • All LEDs illuminate brightly upon flipping the main power switch
- • Audio module powers on with its pairing chime without voltage drop
- • Reversing polarity on the LED strips, which can permanently burn out the controller chips
Final Rigging and Audio-Visual Test
Mount the wired DJ sound tower onto the rear chassis deck and seal all joint seams with hot glue. Power on the system, pair your smartphone or transmitter via Bluetooth, and stream high-bass audio to test both acoustic output and light effects under load. Inspect the rolling clearance under full component weight to ensure no tire scrub occurs.
- • Full DJ truck moves freely with audio playing clearly through the integrated speaker
- • LED patterns pulse evenly along the tower frame without power flickering
- • Adding too much tail weight behind the rear axle, causing the front wheels to lift off the ground
Credit: inspired by an original tutorial by south experiment — watch the original on YouTube.
Don’t have everything?
- No 5mm steel axle rods? Wooden bamboo skewers or straight coat hanger wire
- No Compass cutter? Plastic bottle caps traced with a pencil and cut with a hobby knife
- No 18650 battery holder? Standard 5V USB power bank connected via a stripped USB cable