So I'm kind newish to electronics and am looking to build an LED array as my third project so far.
I have about 1000 of these LEDs: http://au.element14.com/cree/c503b-rcs-cw0z0aa1/led-red-t-1-3-4-5mm-5-1cd-630nm/dp/1855524http://
My current plan is to use a 19.5V, 3.95A AC adapter to power a series/parallel array. The layout that I have come up with is 9 LEDs in series with a 100ohm 1/4 resistor, and 111 rows in parallel for a total of 999 LEDs.
I also want an on/off switch and a "dimmer". Originally I had planned to use a potentiometer, but it seems that may not be ideal for an LED array.
I'm hoping that someone with a bit of experience can comment on the validity of my current design and propose a good method for dimming.
Thanks in advance.
I have about 1000 of these LEDs: http://au.element14.com/cree/c503b-rcs-cw0z0aa1/led-red-t-1-3-4-5mm-5-1cd-630nm/dp/1855524http://
My current plan is to use a 19.5V, 3.95A AC adapter to power a series/parallel array. The layout that I have come up with is 9 LEDs in series with a 100ohm 1/4 resistor, and 111 rows in parallel for a total of 999 LEDs.
I also want an on/off switch and a "dimmer". Originally I had planned to use a potentiometer, but it seems that may not be ideal for an LED array.
I'm hoping that someone with a bit of experience can comment on the validity of my current design and propose a good method for dimming.
Thanks in advance.