I used a 60W 230v lamp in series with a 110v valve clock radio when I was
about 9 years old. I couldn't afford a transformer. It worked amazingly well
but the clock was always slow something to do with the frequency and a
synchronous motor that didn't like 50 Hz. It always started bright and went
dim as the valves warmed up. Never figured that out ...

It works as a voltage divider so it should work as a current limiter as
well. The also make good RF dummy loads.

Steve 

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of
Harold Hallikainen
Sent: 04 January 2007 15:58
To: Pic List
Subject: [EE] Incandescent Light Bulb as Current Limiter

I'm considering using an incandescent light bulb as a current limiter in a
circuit, but having trouble finding voltage versus current data for light
bulbs. All my Google searches turn up consumer info on people that want to
sell me light bulbs. Using the term ballast turns up stuff on fluorescent
lamps. Using constant current turns up stuff on LEDs. So, anyone know
where such data may exist?

THANKS!

Harold



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