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Author Topic: dimming lots of lightbulbs  (Read 526 times)
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berlin
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Hi

I would like to dim a bunch of (like 400) standard incandescent lightbulbs.

a. Can I run a standard bulb on DC? It would make things a lot simpler
b. Can I dim (plenty and fast) a standard bulb with PWM?

Basically I want to treat a bulb like a LED, but with a sturdier schematic of course...

cheers folks!

fubbi
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Montreal
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a. Yes.
b. Yes.
There are not much difference between LED and bulbs, except thermal inertia, which is good for PWM
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berlin
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a. Yes.
b. Yes.
There are not much difference between LED and bulbs, except thermal inertia, which is good for PWM

awesome, thanks!

Now how do I calculate the amount of DC current a bulb with say 40w needs?

Basically, I intend to do this like I would a LED matrix, a 74HC595 shift register can't handle this right?
Do I need something more powerful, or transistors?

I am looking for the minimal solution, space and budget wise to do this...

fubbi
« Last Edit: November 29, 2011, 05:46:07 pm by fubbi » Logged

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Now how do I calculate the amount of DC current a bulb with say 40w needs?
P=E*I

So, if your bulbs are powered with 24 volts: 40W=24V*?A
40/24=1.67amp
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Basically, I intend to do this like I would a LED matrix, a 74HC595 shift register can't handle this right?
Do I need something more powerful, or transistors?
Yes.
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