Choosing between an Arduino and a Raspberry Pi is one of the first forks most makers and product teams hit. Both boards are excellent. They solve different problems. Pick the wrong one and you spend weeks fighting the platform instead of building the product.
Quick takeaway
Rule of thumb: use an Arduino when you need reliable, real-time control of sensors and actuators with simple software and low power. Use a Raspberry Pi when you need a full Linux computer—networking, cameras, file systems, multiple processes, or a richer UI. When you need both timing-critical I/O and heavy software, use them together.
JIGMOD sits beside either choice: adapters mount Arduino or Raspberry Pi boards onto a modular platform, and the same family of modules (proto boards, servos, displays, USB) plug into either workflow without reinventing wiring every time.
What Arduino is best at
Arduino-class boards are microcontrollers. They boot instantly, run a single program in a tight loop, and talk to pins with predictable timing. That makes them a natural fit when your project is mostly about the physical world:
- Real-time I/O — reading buttons, sampling ADCs, driving PWM, bit-banging protocols where microseconds matter.
- Deterministic control — motor drivers, PID loops, LED timing, and anything that must not pause for the OS.
- Low power and simple power budgets — battery packs, always-on sensors, and designs that sleep most of the time.
- Simple sensors and actuators — temperature, distance, relays, servos, steppers, without dragging in a full OS.
You write firmware (typically C/C++ in the Arduino IDE or PlatformIO), flash it, and the board does that one job forever. There is no desktop, no background updates stealing CPU, and no SD card filesystem to corrupt mid-loop.
If your prototype lives on an Arduino UNO, DUE, or MEGA, the Arduino UNO/DUE/MEGA JIGMOD Adapter mounts the board onto a JIGMOD platform so modules stay aligned as you iterate. For a deeper walkthrough of that workflow, see How JIGMOD Helps Arduino Users Prototype Faster.
What Raspberry Pi is best at
A Raspberry Pi is a small Linux computer. It has a GPU, USB, Ethernet/Wi‑Fi (depending on model), camera interfaces, and enough RAM to run real applications. Reach for a Pi when the work is software-heavy:
- Networking and services — web servers, MQTT brokers, SSH, databases, cloud APIs.
- Cameras and media — CSI camera modules, OpenCV pipelines, video encoding, local dashboards.
- Edge ML and scripting — Python, Node, containers, and light inference where a microcontroller would struggle.
- Complex UIs and multi-process systems — touchscreens, browser UIs, logging, and several programs running at once.
GPIO on the Pi is useful, but it is not the same as microcontroller GPIO. Linux can preempt your process; PWM and timing-sensitive protocols are harder to keep rock-solid in user space. That is fine for many projects—and a reason to hand off hard real-time work to an Arduino when it is not.
JIGMOD adapters cover common Pi boards: the Raspberry Pi Model 3 / B+ JIGMOD Adapter and the Raspberry Pi Model B JIGMOD Adapter. More context for Pi-centric benches is in How JIGMOD Helps Raspberry Pi Users Build Sturdier Prototypes.
Decision checklist
Work through these criteria before you buy another board:
- Do you need an OS? File systems, Wi‑Fi stacks, browsers, Python packages → Pi. Bare metal loop and libraries that fit in flash → Arduino.
- How hard is the GPIO timing? Sub-millisecond control, precise PWM, bit-banged buses → Arduino. Occasional pin toggles and I²C sensors → either; Pi is fine if software wins elsewhere.
- Power and always-on cost — Arduino (and similar MCUs) sip power. A Pi wants a solid 5 V supply and draws more idle current.
- Size and BOM complexity — Arduino sketches stay small. A Pi brings SD cards, OS images, and update surface area. Budget the cost of complexity, not only the sticker price of the board.
- UI and connectivity — HDMI/touch, cameras, and networking stack → Pi. LEDs, small LCDs, and serial debug → Arduino (or Pi if you already need Linux).
- Team skills — firmware engineers often move faster on Arduino; full-stack or data teams often move faster on a Pi.
If three or more rows clearly point one way, choose that platform. If the list splits down the middle, plan a hybrid.
Hybrid setups: Arduino + Raspberry Pi together
Many production-minded prototypes use both. The Pi owns networking, logging, UI, and cameras. The Arduino owns motors, safety interlocks, and timing-critical sensing. They talk over UART, I²C, SPI, or USB serial with a simple message protocol.
Typical split:
- Arduino: closed-loop motor control, emergency stop inputs, sensor sampling at a fixed rate.
- Pi: web dashboard, local ML model, camera capture, cloud sync, configuration UI.
On a shared bench, mounting both boards on one modular platform keeps wiring short and labeled. JIGMOD adapters for Arduino and Raspberry Pi let you park both computers on the same base and grow the periphery with modules instead of a rat’s nest of jumper wires.
How JIGMOD helps either path
Whichever board you choose, the slow part of prototyping is rarely the microcontroller or SBC itself—it is remounting, rewiring, and rebuilding the same sensor and power blocks. JIGMOD addresses that with board adapters plus modules you can reuse across projects:
- Proto Board JIGMOD — soldered or temporary custom circuits that stay with the platform.
- Servo Interface JIGMOD — cleaner servo hookups for Arduino motion work or Pi-driven hobby robotics.
- LCD Screen JIGMOD — a fixed HMI panel for status and menus without floating displays on jumper wires.
- USB 2.0 A, USB 2.0 B, Micro USB, and Mini USB modules — power and host/device links that stay mechanically secure on the platform.
Start from the board you already know. Mount it with the matching adapter, attach only the modules you need this week, and keep the same layout when you swap firmware or even swap from Arduino to Pi later. That is the practical middle ground: choose the right computer for the job, and keep the physical prototype modular so the next revision does not start from a blank breadboard.
Bottom line: Arduino for tight, low-power, real-time control; Raspberry Pi for Linux-class software, cameras, and networks; both when your product needs both. JIGMOD adapters and modules are there to make either choice—and the hybrid—faster to build and easier to revisit.