User:Mister rf/sandbox

This is the user sandbox of Mister_rf. A user sandbox is a subpage of the user's user page. It serves as a testing spot and page development space for the user. For a sandbox of your own, create it here; you can also add {{My sandbox}} to your userpage for easy access. Commons' main sandbox

"Test Photo Gallery"

Semiconductors

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  My replica of the first working transistor
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  My replica of the first working transistor