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Industrial 24VDC Supply

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dvisser

Joined: Aug 31 2010
Posts: 4


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Post Tue Aug 31, 2010 5:57 am

We are wanting to use a 24VDC power source. Can this be done by just changing the Resistor value? If so what should the value be? We are looking at using the 5mm LED Holder and an LED that fits.
bad venge

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Post Tue Aug 31, 2010 6:02 am

Use 2 prewired in series will work as well
dvisser

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Post Tue Aug 31, 2010 6:23 am

The problem is that I will have a total of 72, all of which are going to be individually controled. So wiring them in series won't work.
dvisser

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Post Tue Aug 31, 2010 7:40 am

If I am thinking correctly wouldn't I just need to double the resistors, or have 2 of the resistors in series with the one LED?
bad venge

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Post Tue Aug 31, 2010 8:03 am

I'm too busy to work the numbers at work , I'll figure it when I get home ...
corvettecrazy

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Post Tue Aug 31, 2010 3:11 pm

Voltage regulators or get a 12 volt supply. Not really that hard.
PwrRngr

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Post Tue Aug 31, 2010 3:34 pm

Everything in the circuit (ie, the resistor) except the LED is linear. But if you doubled the resistor value and voltage, it would also double the voltage to the LED. One would have to factor this in.
dvisser

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Post Mon Sep 13, 2010 9:48 am

I finally found the Resistor Calculator. By reverse engineering the 12V setup I am guessing that the desired "Load" on the LED is 20mA, correct?

Using this Ishould be using a 1.2K Ohm resistor. Then using using ohms law a single LED circut would draw approximatly .48Ws. So to play it safe I should use a 1W rated resistor like it recommends correct?
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