leds voltage regulating diode - Electronic Circuits Projects Diagrams Free

linuxglobal · 6th March 2006, 10:48 PM

Does anyone have a calculator that includes diodes in the wiring diagram. All of the ones ive seen so far use resistors only.

This is what i have in mind.

20 superflux amber leds
2v, 60ma -70 maeach.

in 4 arrays of 5 leds.

I dont know how to use a voltage regulator.

THanks in advance.

audioguru · 7th March 2006, 12:13 AM

You don't use a voltage regulator for LEDs. You limit the current with a resistor or a current regulator.

Are your LEDs rated for such a high current? Most LEDs operate at only 20mA with 30mA as max.

Styx · 7th March 2006, 12:36 PM

Quote:

Originally Posted by audioguru

You don't use a voltage regulator for LEDs. You limit the current with a resistor or a current regulator.

Are your LEDs rated for such a high current? Most LEDs operate at only 20mA with 30mA as max.

most but not all. my boss has some ultra-bright LED's that take 1A (they drop 6V mind)

audioguru · 7th March 2006, 02:02 PM

Quote:

Originally Posted by Styx

my boss has some ultra-bright LED's that take 1A (they drop 6V mind)

If you used 20 of them on a car then they would blind everybody and would be so hot that you could cook a meal on them. :lol:

aiva · 7th March 2006, 02:39 PM

I have just got some diagrams.

audioguru · 7th March 2006, 02:43 PM

You can also use ordinary transistors to regulate the current for LEDs:

linuxglobal · 8th March 2006, 11:07 PM

thanks

By the way, these are superflux. They have the square bases and they are made to burn hotter = more light. Im sure some of you have seen them, the sit a little above the circuit board (1mm) and they have 4 legs (2 identical) for the power leads.

I found out 50ma is a safe operating voltage. THey are not super bright because they have a 70 degree viewing angle, therefore the light is very spread out vs the traditional 20 degree 5mm leds.

Thanks for the help guys and audioguru for the diagrams. I think i will use transistors. I read an article of some sort of wiring diagram that use diodes (thats why i brough it up) kinda like veins. The diagram had a valve sorta shape. With current only being allowed in one direction.

IT was neat, and they were called diodes...

You guys know best.

Thanks.

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6th March 2006, 10:48 PM	(permalink)
linuxglobal	leds voltage regulating diode Does anyone have a calculator that includes diodes in the wiring diagram. All of the ones ive seen so far use resistors only. This is what i have in mind. 20 superflux amber leds 2v, 60ma -70 maeach. in 4 arrays of 5 leds. I dont know how to use a voltage regulator. THanks in advance. __________________ email: camunteanu@gmail.com http://i32.photobucket.com/albums/d2...tvsdayfogs.jpg

7th March 2006, 12:13 AM	(permalink)
audioguru	You don't use a voltage regulator for LEDs. You limit the current with a resistor or a current regulator. Are your LEDs rated for such a high current? Most LEDs operate at only 20mA with 30mA as max. __________________ Uncle $crooge

8th March 2006, 11:07 PM	(permalink)
linuxglobal	thanks By the way, these are superflux. They have the square bases and they are made to burn hotter = more light. Im sure some of you have seen them, the sit a little above the circuit board (1mm) and they have 4 legs (2 identical) for the power leads. I found out 50ma is a safe operating voltage. THey are not super bright because they have a 70 degree viewing angle, therefore the light is very spread out vs the traditional 20 degree 5mm leds. Thanks for the help guys and audioguru for the diagrams. I think i will use transistors. I read an article of some sort of wiring diagram that use diodes (thats why i brough it up) kinda like veins. The diagram had a valve sorta shape. With current only being allowed in one direction. IT was neat, and they were called diodes... You guys know best. Thanks. __________________ email: camunteanu@gmail.com http://i32.photobucket.com/albums/d2...tvsdayfogs.jpg