L298N Dual H-Bridge Motor Driver
by ST clone module
SKU: PSA-CMP-L298N
No reviews yetTypical India street price
₹90–₹180
Drives two DC motors or one stepper — standard Indian robot shield.
Interface: PWM + direction pins
H-bridge enable/direction often uses the motor overlay pins — mutually exclusive with LCD I2C.
Motor overlay uses D1 (and paired pins). Give motors their own battery.
Blockly: set_motor, motor_speed
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Concept
L298N is a dual H-bridge motor driver: it lets a microcontroller reverse and PWM two DC motors (or drive a bipolar stepper) without frying GPIO pins.
A little theory
An H-bridge is four switches arranged like an H around the motor. Closing opposite pairs applies voltage forward or reverse; PWM on ENA/ENB sets average voltage (speed). Inductive kickback is clamped by diodes. L298 bipolar Darlingtons drop ~1.5–2 V — motors see less than battery voltage and the chip gets hot when stalled. Always share GND between logic and motor supply. In the classroom, treat L298N Dual H-Bridge Motor Driver as a beginner part using PWM + direction pins. Typical India street price is about ₹90–₹180. Always verify voltage and pin labels on your exact module — silk screens vary across clones. Start with a datasheet or trusted learn guide, power the part correctly, share GND with the MCU, and test with a simple blink/read sketch before building the full project. Measure voltages with a multimeter when something fails, and keep actuator current off the MCU regulator.
How it works in a project
Motor supply to VCC (screw terminal), logic 5 V as required. ENA/ENB PWM from MCU; IN1–IN4 set direction. For 2WD: Motor A left, Motor B right. Remove the 5 V regulator jumper when using >12 V motor packs so you do not back-feed the MCU rail incorrectly.
Classroom & project use
- 2WD / 4WD robots
- Pump control
- Linear actuator demo
- Line-follower drive
Buying in India
Precautions
- Common GND with MCU
- Never power motors from NodeMCU USB
- Heatsink when stalled; add bulk capacitor on motor supply
Specifications
| Channels | 2 |
| Current | ~2 A peak / ch (heatsink) |
| Chip | L298N |
| Category | Drivers & Relays |
| Difficulty | Beginner |
| Voltage | Motor 5–35V; logic 5V |
| Interface | PWM + direction pins |
Pinout
ENA IN1 IN2 IN3 IN4 ENB | Motor A | Motor B | VCC (motor) | 5V | GND
