A 3 stud wide robot attachment that can lower and raise a Staedtler triplus broadliner (or other Ø 8 mm pen ) to draw shapes on the driving surface. 
A limit switch is fitted to allow a reset block to to be run at the start.
This was designed to fit between the wheels of the F3CIT Mk III driving base that will be uploaded shortly
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Name PenDownUpV01
Designer Spikeymikey
Designed 2018
Inventory 111
Theme Mindstorms
Gingerbread House
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