this post was submitted on 14 Feb 2026
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[โ€“] ulterno@programming.dev 7 points 5 hours ago* (last edited 5 hours ago) (1 children)

How did that work?
Doesn't pencil lead material just work as a resistor? It's mostly graphite and clay, and shouldn't have the required structure to work as a semi-conductor.

Ahh right. I had forgotten about how to term "semi-conducting" was used back in elementary, thanks to semiconductors and the lot.

In my case it gave off a few sparks at the contacts what really makes it interesting for young me.