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FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > Alternative LEDs Circuit and Calculator

RSS >  Alternative LEDs Circuit and Calculator
dagobah #1 15/09/2007 - 13h59

Class : Apprenti
Posts : 2
Registered on : 15/09/2007

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Alternative method instead of the 'official' 4 resistors circuit.
Click here for LED circuit and calculator

Just trying to help users of this great program.
In time, we could create a Common problems/Troubleshooting FAQ Sticky!
tristan68 #2 15/09/2007 - 17h02

Electronicien en chef
Class : Electronicien en chef
Posts : 651
Registered on : 10/07/2007

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Hello Dagobah

FIY, freetrack has its own led wizard, Look here

I just had a look at the page you provided and i personnally don't recommend it, since one of their drawing is dangerous.

In all cases , if you want to go sure, you have to put a resistor in each led group (a led group is formed by 1 or several serial wired leds ).

Because your leds don't have exactly the same characteristics, you can't just put 1 resistor in front of a parallel grouping, as showed on this web site.

It may work, you may also have problems (1 led shining much brighter than others, or 1 led being destroyed because this led got most of the current of the group).

If you know enough about electronics, then you don't need those wizards.
If you don't know enough, you should always use a wizard which provides you drawings and values you can trust.


About FAQ and troubleshooting database :
we're thinking about it. Stay tuned  ^ ^


Cya

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