There are, but they're not very ... useful. Sigils encapsulate concepts--there's no point in generating an electrical current you can't control when you can use sigils to generate light or energy directly.

[Anton glances down at the table and gently puts some things aside to give himself a little more space, and brushes away the light-sigils. When he draws the next sigil he adds a time-delay so he can pull his hand away without being hurt; the sigil activates and it's like watching a little spring of lightning crackle on the table, scorching its surface and trying--and failing--to arc toward some of the metallic objects nearby.]