so tinkercad has circuit designand arduno now, a real arduino is $20, IDE is free, fritzing is free and does all the exact same layout stuff locally, you save your files and keep them forever.

If you’re dealing with RF, you’ll probably have the need to generate a variety of clock signals. Fortunately, [Jason] has applied his knowledge to build a SI5351 library for the Arduino… ...

We have feature quite a few cool clocks here at Geeky Gadgets, the latest one is the work of Andrew O'Malley, the DOTKLOK, which is an open source Arduino digital clock.

The idea here is to use a cheap clock from IKEA, wire in a bunch of LEDs, connect and Arduino, and then use the 1Sheeld to trigger color changes depending on the traffic time between two points.

DOTKLOK Is A Hackable, Open-Source, Arduino Clock. Also Neat Looking. Contributor. 2:24 PM PST · February 23, 2011. Sick of telling time the old way?

If you dig DIY clocks or you just think lasers are cool, this is the kind of project that you might want to try, especially if you're getting started with Arduino projects.You'll need an Arduino ...

A new Arduino binary clock has been created by the La Fabrique DIY team, which has been inspired by the architecture within Paris powered by Arduino ...

There is also a lot more inside Tinkercad — You can create Arduino circuits using it as well as Minecraft models that you can export into the game — but they are beyond the scope of this article.