Adafruit
Adafruit MOSFET Driver - For Motors, Solenoids, LEDs, etc
The Adafruit STEMMA MOSFET Driver makes it safe and simple to control motors, solenoids, high-power LEDs, and other current-hungry loads from any microcontro...
The Adafruit STEMMA MOSFET Driver makes it safe and simple to control motors, solenoids, high-power LEDs, and other current-hungry loads from any microcontroller. Instead of wiring up a transistor and flyback diode on a breadboard, this compact board has everything built in — just connect power, signal, and your load.
At the heart of the board is an AO3406 N-Channel MOSFET rated for 30 V, 3.6 A peak, with a low 70 mΩ on-resistance, paired with a 1N4007 flyback diode for inductive load protection. The STEMMA JST PH input connector provides solderless hookup, and the logic input accepts 3–20 V signal levels.
Key Features
- AO3406 N-Channel MOSFET – 30 V drain-source, 3.6 A peak, 70 mΩ RdsOn
- Built-In Flyback Diode – 1N4007 protects against inductive kickback from motors and solenoids
- Wide Power Range – 3–30 V load voltage
- Wide Logic Range – 3–20 V signal input (works with 3.3 V and 5 V microcontrollers)
- STEMMA JST PH Connector – Solderless 2-pin input for signal and ground
- Screw Terminal Outputs – Two terminal blocks for power in and switched load out
- Breakout Header – Optional 0.1" header pads for breadboard use
- Continuous Current – Up to 1.5 A continuous, 3 A peak
Ideal For
- Driving DC motors, fans, and solenoids from microcontrollers
- Switching high-power LEDs and single-colour LED strips
- Beginner-friendly projects that need safe high-current switching
- Replacing breadboard transistor + diode circuits
Package Contents
- 1× Adafruit STEMMA MOSFET Driver (assembled)
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- AO3406
- A small N-channel MOSFET transistor used as an electronic switch for controlling higher-current loads. Its use matters because the microcontroller signal does not power the LED strip directly; the MOSFETs switch the larger LED current safely.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- JST PH
- A small keyed plug-and-socket connector with 2 mm pin spacing, often used for low-power electronics connections. You need the correct JST PH cable, and its current rating limits how much power should be passed through it.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- pH
- A measure of how acidic or alkaline a liquid is, on a scale where 7 is neutral. For a water monitoring kit, pH tells you about water chemistry and whether the included probe matches the range and accuracy your project needs.
- STEMMA
- A plug-and-cable connection system used on some maker electronics boards to make wiring simpler. If a product uses STEMMA, you need the matching cable or connector type to plug it in without soldering.
Find this product in
Brands
Robotics & Motion
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
