Yavor is a PM at Snowflake working on developer experience. Previously at Docker, Auth0, Hulu, and Microsoft Azure.
The standout feature: . You could write Arduino code in a web-based IDE, attach it to a virtual Uno, and watch LEDs blink, servos turn, or serial output appear – all without hardware. This wasn’t just a SPICE simulator; it was a microcontroller emulator. For learning, this was gold. You could debug logic errors before soldering a single joint.
As a browser app, it choked on boards with more than ~100 components. Panning/zooming became laggy, and auto-routing could take minutes. Worse, occurred if your internet dropped during an auto-save – a nightmare for a Friday night project. 123d circuits
For beginners, downloading EAGLE or KiCad (both with steep learning curves) was a barrier. 123D Circuits ran in Chrome. Sign up, and within 60 seconds you could place a resistor and wire an LED. This was transformative for classrooms and workshops where installing software on shared computers was a nightmare. The standout feature: