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Topic: NPN "High Current" (Read 530 times) previous topic - next topic

Runaway Pancake

Here's > 240 mA through LEDs, approx 14 mA ea., via PN2222A.
These transistors cost < 10 cents.



That all should be self-explanatory.

The DVM readings in the following demo are just a wee bit off from those in my schematic (above) as, in between, I was working with something else and didn't dial back the supply exactly - so sue me.

http://www.youtube.com/watch?v=6mvGIvimAEs

I use a jumper [ J ] to switch between 1 LED and 20.
Even with V_ce = 300mV, device dissipation is < 100 mW.

There's no precarious balance going on, it's a solid performer.
Party On.
"You gotta fight -- for your right -- to party!"
Don't react - Read.
"Who is like unto the beast? who is able to make war with him?"
Hey, it's "bipolar transistor" or "junction transistor" - "BJT" is just stupid.

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