This is for a electronics project that I am working on. Any advice
would greatly be appreciated. I know how to solder, I have a multimeter and I have several electronic stores nearby.
How do I do this? The LED are rated @ forward voltage range 1.7Vdc-2.2Vdc 15-25mA.
Thanks a million.
2006-08-31 03:31:49 · 5 answers · asked by michelevit 2 in Consumer Electronics ➔ Other - Electronics
There are a few ways to do it. I would put a Resistor inline.
Take a look here http://www.lunaraccents.com/articles/013.htm
2006-08-31 03:44:32 · answer #1 · answered by dodgebus 2 · 0⤊ 0⤋
One LED or two or more LEDs??
Let's say it is one LED. Let's also pick some numbers for the LED operating point like 20 mA and 2V. (This is a guess, your data sheet might be more accurate, but it shouldn't matter very much.
Put a resistor in series with the battery and LED.
The resistor operating data is
V = 6V - 2V = 4V
R = V/I = 4V/20 mA = 200 Ohms.
You could also put two LEDs in series with a 100 Ohm resistor and the battery. You may also want to measure the battery voltage as it could be as high as 7V if it is new. Although, these same variances don't matter too much.
2006-08-31 04:58:15 · answer #2 · answered by Tom H 4 · 0⤊ 0⤋
An LED is a diode (mild Emitting Diode) and diodes are the two On or Off. not something in between. So brightness isn't plagued via greater (or much less) voltage. Nor does the quantity of voltage impression the "clever life" of the LED. What does impression an LED is the quantity of present day that could desire to burn out the LED, so there is probable a present day limiter interior the lantern to avert that form of harm.
2016-10-01 03:16:34 · answer #3 · answered by ? 4 · 0⤊ 0⤋
Since you have 6V and each LED needs about 2V, the easiest way would be to hook the LEDs up in series in groups of 3, so that each one gets about 2V. As explained on this page, http://www.theledlight.com/ledcircuits.html in the first section 'series'
You don't need a resistor if you do it it groups of 3, because the voltage required by the LEDs adds up to your supply voltage.
2006-09-03 07:08:14 · answer #4 · answered by DaSloppy7 1 · 0⤊ 0⤋
Go to www.ledsupply.com. They have a technical page that shows you how to figure resistor values.
2006-08-31 04:47:42 · answer #5 · answered by stan l 7 · 0⤊ 0⤋