Gears and transmission
Line Following Robot Chassis Assembly
- Bounding box
- 132.5 × 158.0 × 47.0 mm
- Engine
- Precision B-rep
- Parameters
- 43
- Published
- September 10, 2026
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The prompt
create a chassis for a line following robot with this circuit design and using these components: Component Quantity Purpose ATmega328P-PU (DIP-28) 1 Main microcontroller 28-pin DIP socket 1 Socket for ATmega328P USBasp ISP programmer 1 Programs the ATmega328P 6-pin ISP header 1 Programming connector 16 MHz crystal 1 ATmega328P clock 22 pF ceramic capacitor 2 Crystal load capacitors 10 kΩ resistor 1 RESET pull-up 0.1 µF ceramic capacitor 2–3 Power/AVCC decoupling Reset pushbutton 1 Manual reset 5-way TCRT5000L IR tracking sensor module 1 Detects the line TB6612FNG dual motor driver 1 Controls the two motors N20 metal gear motor, 6 V, ~300 RPM 2 Drives the robot Wheels compatible with N20 motors 2 Robot movement Caster wheel/ball caster 1 Balance/support 7.4 V battery** 1 Main power source 5 V buck converter 1 Regulates battery voltage to 5 V SPST toggle switch** 1 Main ON/OFF switch Battery connector 1 Battery connection 100–470 µF electrolytic capacitor 1 Helps stabilize motor supply 0.1 µF ceramic capacitor 1 High-frequency motor-driver decoupling Robot chassis 1 Holds components Perfboard/PCB 1 Mounts circuit Jumper/hookup wires — Connections Male/female headers — Module connections Screw terminals/connectors — Motor/battery connections Standoffs/screws — Mounting components
Parameters
| Name | Value | Range |
|---|---|---|
| Chassis Length | 120 mm | 80 – 200 |
| Chassis Width | 80 mm | 50 – 150 |
| Chassis Thickness | 5 mm | 2 – 10 |
| Mounting Hole Diameter | 4 mm | 1 – 8 |
| Mounting Hole Offset | 8 mm | 2 – 20 |
| Motor Mount Hole Diameter | 3 mm | 1 – 6 |
| N20 Motor Length | 30 mm | 15 – 50 |
| N20 Motor Diameter | 12 mm | 6 – 20 |
| Wheel Diameter | 42 mm | 25 – 80 |
| Wheel Width | 8 mm | 4 – 20 |
| Motor Chassis Overlap | 6 mm | 0 – 15 |
| Caster Ball Diameter | 19.05 mm | 12 – 20 |
| Caster Stem Diameter | 8 mm | 3 – 15 |
| Caster X Offset | 50 mm | 20 – 60 |
| PCB Length | 70 mm | 40 – 120 |
| PCB Width | 50 mm | 30 – 75 |
| PCB Thickness | 1.6 mm | 0.8 – 3 |
| PCB X Position | 10 mm | -30 – 30 |
| PCB Y Position | 0 mm | -15 – 15 |
| Battery Length | 70 mm | 40 – 100 |
| Battery Width | 35 mm | 20 – 60 |
| Battery Height | 20 mm | 10 – 35 |
| Battery X Position | -35 mm | -55 – -10 |
| Battery Y Position | 0 mm | -20 – 20 |
| Buck Converter Length | 45 mm | 25 – 70 |
| Buck Converter Width | 20 mm | 10 – 35 |
| Buck Converter Height | 8 mm | 3 – 15 |
| Buck X Position | 35 mm | 10 – 55 |
| Buck Y Position | -28 mm | -38 – -15 |
| Toggle Switch Diameter | 6 mm | 3 – 12 |
| Toggle Switch Height | 10 mm | 5 – 20 |
| Switch X Position | 55 mm | -55 – 55 |
| Switch Y Position | 30 mm | -38 – 38 |
| IR Sensor Board Length | 50 mm | 30 – 75 |
| IR Sensor Board Width | 15 mm | 8 – 30 |
| IR Sensor Board Thickness | 1.6 mm | 0.8 – 3 |
| IR Sensor X Offset | 65 mm | 55 – 80 |
| IR Sensor Ground Clearance | 5 mm | 2 – 10 |
| IR LED Diameter | 4 mm | 2 – 8 |
| IR LED Height | 6 mm | 2 – 10 |
| ISP Header Pin Count | 6 mm | 3 – 10 |
| ISP Header Pin Spacing | 2.54 mm | 1.27 – 4 |
| ISP Header Height | 11 mm | 5 – 20 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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