This is the least expensive way to get a pinduino -- build it yourself. Kit comes with Pinduino board, components, arduino nano, plug for Stern AUX power, 6' of wire, and heat shrink tubing.

Instructions for assembling pinduino: https://docs.google.com/document/d/1grTKPH8T04WSQGyNyHqwThPKfuNWQHXw4X1Uf4e243M/edit

Instructions for building/installing backbox/apron kit: https://docs.google.com/document/d/1bEfle0jqKVcvsRljtDMhHg7KNBKkVCTSOdQcvhhCL84/edit

Instructions for all things Pinduino: https://drive.google.com/drive/u/0/folders/0B2njOnd06CCOdlBCVzdiWFZhUVE

All code open source: https://github.com/elyons/professor_pinball_pinduino_sketches

Plugs into J6/J7 on Stern Whitestar and SAM power driver boards.

Make exciting lighting effects integrated with gameplay:

pinduinosternsam