🚀 Bidirectional (CW/CCW) Motor Control using GPIO and MOSFETs
This guide explains how to use GPIO pins to control the direction of a DC motor using a MOSFET-based circuit, starting from your current schematic.
✅ Option 1: Use an H-Bridge (Recommended)
Use 4 MOSFETs or an H-bridge IC like:
- L298N
- DRV8871
- BTS7960
Logic Table:
| IN1 | IN2 | Motor Direction |
|---|---|---|
| 1 | 0 | CW |
| 0 | 1 | CCW |
| 0 | 0 | Coast (OFF) |
| 1 | 1 | Brake (Stop) |
✅ Option 2: Use Two MOSFETs (Discrete H-Bridge Half)
Use two N-channel MOSFETs:
+Vbat
|
Motor
|
A ---------> MOSFET1 --------> GND (CTRL1 = CW)
|
B ---------> MOSFET2 --------> GND (CTRL2 = CCW)Control Logic:
| CTRL1 (CW) | CTRL2 (CCW) | Motor State |
|---|---|---|
| HIGH | LOW | Spin CW |
| LOW | HIGH | Spin CCW |
| LOW | LOW | OFF |
| HIGH | HIGH | 🚫 Avoid! (Short) |