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neilbaker86 · 18th February 2019, 11:38

That LED will already have a resistor built-in, as it has been designed to be operated with just a simple 12v supply.

As has already been mentioned, you really need a PWM supply whereby you can alter the duty cycle to control the brightness.

Depending on what you are trying to achieve, I'd take a look at an Arduino (Mini Pro is small, but a standard Nano has a USB socket for ease of programming), they are very small and can be programmed with lots of helpful information available on the internet.

18th February 2019, 11:38	#6
neilbaker86 Gets stuck in MG ZT Join Date: Jun 2011 Location: Oxford Posts: 847 Thanks: 124 Thanked 312 Times in 147 Posts	That LED will already have a resistor built-in, as it has been designed to be operated with just a simple 12v supply. As has already been mentioned, you really need a PWM supply whereby you can alter the duty cycle to control the brightness. Depending on what you are trying to achieve, I'd take a look at an Arduino (Mini Pro is small, but a standard Nano has a USB socket for ease of programming), they are very small and can be programmed with lots of helpful information available on the internet. Last edited by neilbaker86; 18th February 2019 at 11:44..