Multiholder  Prototyping Board for the Arduino and Rasperry Pi also fits the Pibow
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Multiholder - Prototyping Board for the Arduino and Rasperry Pi (also fits the Pibow)

After spending a day tinkering with the Oomlout design a day dawning thought was to combine it with an earlier phenoptix creation the Pibow ProtoPlate Just meant adding some extra width and eight more holes! ...

similar models —

Multiholder - Prototyping Board for the Arduino and Rasperry Pi (also fits the Pibow) alternatives