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02-24-2014, 03:57 AM | #1 |
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Join Date: Aug 2010
Location: Netherlands, The Hague
Posts: 1,518
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Re: Suburban K20 1986 Silverado - "Silvester"
hi MAtt21lutz. all the info is in the build thread. but here you go.
datasheet: http://www.futurlec.com/Linear/LM2940CT-12.shtml it says .47uF before and 22 uF after the voltage regulator. this is the picasa webalbum with all my pictures: https://picasaweb.google.com/1072267...JueyP6F4LfzxAE Your setup is not quite right. but then again its not complete, because you cant see the whole circuitery. look at my design: you can see small black parts on the boards? those are very small SMD resistors. they are a pain in the ass to solder in there, but take up little space and give a clean end result. I use one resistor per string of 4 leds to control the current running through the strings (leds). so what you basically want is - max brightness setup by the reistors in the strings (SMD in my case) BRAKE/TURNSIGNAL - and reduced brightness for running lights using one bigger resistor in line with all of them. one big resistor is the simple method for controlling brightness, but you can only dimm so much using a resistor. below a certain current/voltage the LEDS just turn off...better cleaner way is to use PWM. but also more expensive.
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My dreamride / project:1977 GMC C15 Suburban In storage: Monster - 1974 GMC Suburban 25hundred Sold : Chevrolet Suburban K20 Silverado 1986 Guide: real HID projectors for 4x6 headlights link: DIY LED TAILLIGHTS |
02-27-2014, 03:00 AM | #2 | |
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Join Date: Dec 2013
Location: Georgetown, Texas
Posts: 104
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Re: Suburban K20 1986 Silverado - "Silvester"
Quote:
So I've run through this quit a few times, I would just like to get someone else's input on the "new" design. Added the caps what I believe to the entire circuit. There are two versions, one that uses a resistor to dim the LED's and one that uses a PWM with a lower voltage (10 volts), let me know what you think? http://www.digikey.com/schemeit#o82
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My current ride: 1983 C10 Silverado LWB - Work in Progress Last edited by Matt21lutz; 02-27-2014 at 03:08 AM. |
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