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Arduino Tank Robot - Pin Connections

Motor Controller (L298N) Connections

Arduino Pin L298N Pin Function Wire Color (Suggested)
3 (PWM) ENA Left Motor Enable Yellow
4 IN1 Left Motor Direction 1 White
5 IN2 Left Motor Direction 2 Gray
6 (PWM) ENB Right Motor Enable Orange
7 IN3 Right Motor Direction 1 Blue
8 IN4 Right Motor Direction 2 Green

Power Connections:

  • L298N +12V → Battery+ (7-12V)
  • L298N GND → Battery-
  • L298N GND → Arduino GND (common ground)

PS2 Controller Receiver Connections

Arduino Pin PS2 Receiver Pin Function Note
13 CLK Clock
11 CMD Command
10 ATT Attention
12 DAT Data
3.3V VCC Power (3.3V) ⚠️ Do not use 5V!
GND GND Ground

Motor Wiring

L298N Terminal Motor Wire Polarity
OUT1 Left Motor+
OUT2 Left Motor-
OUT3 Right Motor+
OUT4 Right Motor-

Power System

graph LR
    A[12V Battery] --> B[L298N Power Input]
    B --> C[Motors]
    D[Arduino Power] --> E[Vin/Barrel Jack]
    B -- GND --> F[Common Ground]
    E -- GND --> F
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Critical Notes:

  1. Insulation: Always maintain EVA foam layer between aluminum chassis and electronics
  2. Power Separation:
    • Use separate power sources for motors (12V) and Arduino (7-12V)
    • Connect all grounds together
  3. PS2 Voltage: Receiver requires 3.3V (5V will damage it)
  4. PWM Pins: Must use PWM-capable pins (3,5,6,9,10,11) for speed control
  5. Cable Management:
    • Use zip ties for wire organization
    • Keep motor wires away from signal wires

Troubleshooting Tips:

  • If motors vibrate but don't move: Swap IN1/IN2 or IN3/IN4 connections
  • If PS2 not detected: Check 3.3V power and ATT pin connection
  • If motors run at full speed only: Verify PWM pin connections (ENA/ENB)