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Author Topic: Need help with Led light project  (Read 6532 times)

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diyguy

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Re: Need help with Led light project
« Reply #15 on: June 22, 2013, 08:20:32 AM »
Hi new Q iv made a 75w red blue out of 3w leds
specs for red 3w >>>http://www.aliexpress.com/item/5pcs-High-Power-3W-Red-Led-Lamp-70-80lm-RED-led-beads-use-for-DIY-led/907757928.html
specs for blue 3w>>>http://www.aliexpress.com/item/50pcs-lots-3W-Royal-Blue-Power-LED-455nm-Plant-Growth-Light/926584912.html

iv uploaded pic of my lay out i just don't no how to add the power needed up so i can get the right power driver any help here wd be nice thanks guys.

4red x20 1blue x5

kam

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Re: Need help with Led light project
« Reply #16 on: June 23, 2013, 00:51:13 AM »
You will connect them in series, so you know you need 1A current driver. The voltage that you need is the sum of the sub-voltages of the LEDs. So, if each one is say 3.4V, you can have strings of 17 LEDs with voltage about 58volts.

diyguy

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Re: Need help with Led light project
« Reply #17 on: June 23, 2013, 03:04:38 AM »
Hi Kam seems like a lot of volts

kam

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Re: Need help with Led light project
« Reply #18 on: June 24, 2013, 09:26:27 AM »
Generally its better to have higher voltage than current, and LED applications permit this. Current produces heat (due to I2R).