ProtoSpin

ProtoSpin is a unique prototyping system consisting of two 30-row solderless breadboards: one fixed, and one mounted on a rotating platform.

The spinning breadboard's first four rows are connected by slip ring to the fixed board's equivalent rows. Other rows on the fixed board allow the stepper motor to be controlled, and for serial communication via the micro-usb port. All power rails are also connected to USB power.

The internal voltage controlled oscillator with low-pass input filter allows for smooth control by simple circuits, i.e. reversing at max speed using a 555. Alternatively a microcontroller can override it and drive STEP directly.

The blue LED is connected to SYNC, which is why a faint blue ghost of the spinning board in the aligned position is visible.

The green LED array is driven by the last three bits of a 256 bit counter. Since there are 3600 steps per revolution, there are 14.06 stripes per revolution. In a 30 second exposure, the stripes slowly advance into a blur.

However if SYNC is used to reset the counter, the stripes remain locked in place.

It is entirely 3d printed. It used parts available at the time so isn't quite as slim as it could be.

Another example with an AVR, 128x32 OLED, and Sharp GP2D12 rangefinder.