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christmas light dimmer
pappa_golf
Posts: 8,895
Forumite
in Techie Stuff
I need a dimmer device for the xmas lights , any ideas ?
Save a Rachael
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Comments
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Can't a variable resistor do the job?0
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Awesome Duracell tree
yeah a variable resistor would do nicely ..
A 555 timer chip would be fun too0 -
thought I might just stick it in a cupboard for a few mths , might have dimmed a bit thenSave a Rachael
buy a share in crapita0 -
I have used a 555 timer on a display like that to give flashing effect. PM me and I will send plan and parts, I have boxes of them.0
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Leave it to run hot, the LED's will start to fail and reduce in output ;-)0
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Pulse-width modulation is the most efficient method. Make the frequency at least 50 Hz to avoid flicker. It's also possible to run several LEDs from a Hobby Hackers Joule Thief Kit, which is extremely efficient and can run 6 LEDs from just 1.5 volts or 12 from 3 volts.0
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