Hello,
I'm very new to electronics and aside from a brief overview in a physics class at school have limited knowledge. I'm trying to learn from the internet but I've come up against a problem.
I'm trying to power the following IR LED from a 12v power source.
http://uk.rs-online.com/web/p/ir-leds/7845787/
In looking at the spec sheet I read the power required is 2W and the forward current is 1A making the voltage 2V right? I've been looking at resistors to use for this setup and have used a calulator to find that I should be using a 10 ohm resistor, I guess to provide me with 1.2A.
When I do use a 10 ohm resistor it blows up by smoking. I've checked with a camera, the LED is powered but the resistor burns out. What am I doing wrong?
Any help would be really appreciated.
Thank you, Tom
I'm very new to electronics and aside from a brief overview in a physics class at school have limited knowledge. I'm trying to learn from the internet but I've come up against a problem.
I'm trying to power the following IR LED from a 12v power source.
http://uk.rs-online.com/web/p/ir-leds/7845787/
In looking at the spec sheet I read the power required is 2W and the forward current is 1A making the voltage 2V right? I've been looking at resistors to use for this setup and have used a calulator to find that I should be using a 10 ohm resistor, I guess to provide me with 1.2A.
When I do use a 10 ohm resistor it blows up by smoking. I've checked with a camera, the LED is powered but the resistor burns out. What am I doing wrong?
Any help would be really appreciated.
Thank you, Tom