Arduino, Raspberry Pi, and microcontrollers can all control actuators, but they are not the same tool. Arduino-style boards are good for direct I/O and timing. Raspberry Pi is a small Linux computer. A microcontroller is the embedded chip you use when the control task needs to become a product.
Wiring and mounting matter as much as force. A controller that cannot carry the current is not a controller — it is a signal source that needs a driver.
"The controller never carries the actuator current. The driver does. Once people separate those two jobs in their head, actuator wiring stops being mysterious." — Robbie Dickson, Founder and Chief Engineer of FIRGELLI Automations
What is the practical difference?
An Arduino runs a simple program directly on a microcontroller. It reacts predictably to buttons, sensors, relays, and motor drivers.
A Raspberry Pi runs Linux. It is excellent for networking, cameras, files, and dashboards, but it is not the cleanest choice for hard real-time motor control without extra hardware.
What should drive the choice?
Choose from the job. If you need 2 buttons and limit switches, keep it simple. If you need a web interface, camera, or cloud connection, a Raspberry Pi may make sense with a proper motor driver. If this becomes a product, design around a microcontroller.
Relevant FIRGELLI products
Which products are worth looking at?
Only use product pages when the hardware actually matches the job. The explanation above should still make sense without buying anything.
Arduino Linear Actuator Kit
Use this when the actuator project needs programmable Arduino-based control hardware.
View Arduino Kit
12V DPDT Relay
Use this when relay-based polarity reversal fits the actuator current and wiring plan.
View DPDT Relay
FCB-2 Actuator Controller
Use this when you want an actuator controller instead of building the control system from scratch.
View FCB-2What components actually matter?
An Arduino, Raspberry Pi, and microcontroller do not drive an actuator directly. They send commands. A relay, H-bridge, motor driver, or actuator controller carries the motor current.
Where would you use this?
Use Arduino-style control for buttons, limit switches, sensors, timed motion, and simple automation. Use Raspberry Pi when the project needs a screen, web interface, camera, network, or data logging. Use a dedicated actuator controller when feedback, synchronization, presets, and current limits matter more than custom code.
How would you use it in a real build?
The control board sends a low-current signal to a driver. The driver switches the actuator current. For a 2-wire DC actuator, reversing polarity reverses direction. For feedback actuators, the controller also reads potentiometer voltage or pulse signals.
What is a realistic example?
A 12V actuator draws 8A. An Arduino pin can supply only a tiny signal current, so it cannot power the actuator. The Arduino output drives a relay module or motor driver rated above 8A. The actuator power comes from a fused 12V supply, not from the Arduino board.
What usually goes wrong?
Do not connect actuator power to a GPIO pin. Do not forget flyback protection on relay coils and motor loads. Do not share grounds blindly on noisy systems without understanding where the current returns.
What should you measure before choosing parts?
Measure actuator current, driver current rating, logic voltage, input type, feedback signal, power supply size, and whether the controller needs networking or real-time response. A Raspberry Pi gives you software power. An Arduino-style board gives you simple real-time I/O. Neither replaces a motor driver.
How should you test it before trusting it?
Test the circuit with the actuator stalled briefly, loaded normally, and starting from rest. Measure current with the real wiring length. Voltage drop matters. A supply that reads 12V on the bench can sag badly once 2 actuators start together.
Cycle the system until the driver, relay, switch, and wires reach normal operating temperature. Warm parts tell the truth faster than a wiring diagram.
What changes when this becomes a real product?
Production wiring needs strain relief, fused supply, known connector ratings, repeatable crimp quality, and documentation. If feedback is involved, the signal wires need routing away from noisy motor wiring where practical. If the system goes into a vehicle, boat, or RV, vibration becomes part of the electrical design.
What rule of thumb should you remember?
Size the electrical path around current, not just voltage. Voltage tells you compatibility. Current tells you what fails.
Which applications are a good fit?
Good applications include robotics projects, test fixtures, smart furniture, lab automation, access doors, camera sliders, and actuator prototypes with sensors. The common thread is controlled motion. The load should move through a known path, with brackets, guides, hinges, or structure carrying the side loads.
What details should go on the design checklist?
Before choosing hardware, write down actuator current, driver rating, logic voltage, feedback signal, common ground, fuse size, startup current, and what happens when code crashes. These numbers and conditions stop the project from turning into guesswork. They also make support conversations much faster because the important facts are already on the table.
For a prototype, you can adjust brackets and reroute wires after the first test. For a finished installation, make those decisions early. Leave access to fasteners. Leave access to wiring. Leave enough room to replace the actuator without taking the whole project apart.
What is the practical takeaway?
The board decides. The driver powers. Keep those jobs separate and the project becomes much easier to debug.
What final check should you do before ordering?
Write the project down as 5 numbers before you buy anything: load, stroke, speed, voltage, and available mounting space. Then add the real-world conditions: water, vibration, dust, heat, access, duty cycle, and what happens if the mechanism jams. This 10-minute check catches most actuator mistakes before money gets spent.
After that, check the control path. The switch, relay, controller, fuse, wire, and power supply all need to match the actuator current. A strong actuator with weak wiring is still a weak system.
