Diagram of D'Arsonval/Weston type galvanometer.
<a href="//commons.wikimedia.org/wiki/User:Fred_the_Oyster" title="User:Fred the Oyster">Fred the Oyster</a>
<a href="//commons.wikimedia.org/wiki/File:Galvanometer_scheme.png" title="File:Galvanometer scheme.png">File:Galvanometer scheme.png</a>