ET-MD03
DRV8871 3.6 A DC Motor Driver
Single brushed motor up to 30 V with built-in current limit
AED 23.00
Out of stockOverview
Single brushed motor up to 30 V with built-in current limit
The ET-MD03 is built around the TI DRV8871 — single H-bridge, 3.6A peak, internal current sensing — no shunt resistor. It runs from VM 6.5–30V on this board (IC 45V; bulk cap 35V); logic 3.3V and 5V.
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- Bigger gearmotors and linear actuators
- 12 V and 24 V pumps
- Robots that stall motors safely
Key features
What makes it different
Driver
TI DRV8871: single H-bridge, 3.6A peak, internal current sensing — no shunt resistor
Supply
VM 6.5–30V on this board (IC 45V; bulk cap 35V); logic 3.3V and 5V
Current limit
1.9A regulation set by R1 (33k); fit 18k for 3.5A
Protection
Current regulation, over-current, thermal, UVLO; coast on power-up (inputs pulled down)
Open documentation
Schematic, BOM and layout notes published for every board.
Breadboard friendly
Standard 2.54 mm pitch and M2.5 mounting holes.
Specifications
Technical specifications
| Driver | TI DRV8871: single H-bridge, 3.6A peak, internal current sensing — no shunt resistor |
|---|---|
| Supply | VM 6.5–30V on this board (IC 45V; bulk cap 35V); logic 3.3V and 5V |
| Current limit | 1.9A regulation set by R1 (33k); fit 18k for 3.5A |
| Protection | Current regulation, over-current, thermal, UVLO; coast on power-up (inputs pulled down) |
| Size | 38.1 × 25.4 mm |
|---|---|
| Mounting | 4 × M2.5 holes, 2.54 mm from each corner |
| Connectors | 4-pin 2.54 mm header · Screw terminal 2P 5.0mm 17A (THT) — Motor supply · Screw terminal 2P 5.0mm 17A (THT) — Motor |
| Main IC | DRV8871DDAR (LCSC C75864) |
| Revision | Rev A |
Performance
Current limit
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VM | Power | 6.5–30V |
| 2 | GND | Ground | Ground |
| 3 | IN1 | Signal | PWM / direction (internal pull-down) |
| 4 | IN2 | Signal | PWM / direction (internal pull-down) |
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-MD03 DRV8871 3.6 A DC Motor Driver (assembled)
- 1 × 4-pin 2.54 mm male header, unsoldered
Getting started
- Wire the header: VM, GND, IN1, IN2
Compare
Which DC motor driver?
| DRV8871 3.6 A DC Motor Driver (this board)This board | ET-MD01 DRV8833 Dual Motor Driver | ET-MD02 TB6612FNG Dual Motor Driver | ET-MD08 4-Channel MOSFET Driver | |
|---|---|---|---|---|
| What it does | Single brushed motor up to 30 V with built-in current limit | Two DC motors or one stepper, 2.7–10.8 V, 1.5 A per channel | Two DC motors with PWM speed control, 4.5–13.5 V, 1.2 A per channel | Four logic-level low-side switches, 3 A each up to 24 V |
| Interface | — | — | IN1/IN2 direction + PWM speed per channel;… | 3.3V and 5V logic, < 1µA |
| Best for | Bigger gearmotors and linear actuators | Small robots and rovers | Two-wheel robots | LED strips and lighting |
| Price | 23 AED | 15 AED | 15 AED | 16 AED |
Downloads
Documents and design files
Need a custom version of this board?
Different connector, size or sensor? We design and build custom variants.