In memory of the patent Ben North and Oliver Nash have come up with a 32-bit core memory Shield for the Arduino! Check out the great report at the project page on how the memory works. They Include all the Eagle files, Gerber files, parts list, and Arduino code for the boards as well.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.