Breadboard circuits on the back of an iPhone

Arduinos, Raspberry Pis, and the like have made prototyping of electronic circuits so simple and convenient it can be done just about anywhere. But a lone designer named Kevin Yang has come up with an idea that could make prototyping ideas even easier and more portable. Yang has developed what he calls the Commi Board, which is essentially a breadboard that sticks to the back of a phone, using its powerful processor in place of a traditional microcontroller. Nick Bild on hackster.io writes:

Commi Board attaches to the back of an iPhone like any other MagSafe accessory. Instead of embedding its own processor, battery, and screen, it is deliberately minimal. The board provides the physical interface for components — pins, traces, and modular sections — while the smartphone supplies the computing power, display, connectivity, and power management.

The app supports four different modes, designed to scale with the user’s skill level. Beginners can use conversational, AI-driven prompts — typing something like “blink an LED every second” — and instantly see working code. More visual learners can use block-based or puzzle-style programming, similar to Scratch, to understand logic flow without worrying about syntax. Advanced users can switch to a full IDE, all while using the same hardware and project files.

Read more on hackster.io.

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