Hello, I'm new to electronics and I'm trying to build a led array. Youtube videos helped me in getting a pretty good idea of what should be done.So right now I'm planning on using GPIO pins of a raspberry pi to control the array. My doubt is "The output voltage of GPIO pins is around 3.3V. How can I control an array of high power LEDs".

@PrashanShan LED driver or relay

@adamaero Thank You. Relay seems to the trick. Lets say I'm making a 9x9 led array I would need 9 individual relays right? Is there any way to use single component to do the job?

@PrashanShan a relay is like the size of a LEGO brick or two. You'll need one for each LED

@PrashanShan Well, I'm wrong. You might be able to use something like this: smile.amazon.com/…

Are there any good turnkey PCB services with an auto-quoting system in north America?

@VoltageSpike for what size an order? onesies, a baker's dozen, hundreds?