 LED Foglight Project |
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| Spoke |
 Apr 13 2019, 08:45 AM
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#1
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Jerry  Group: Members Posts: 7,104 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None 
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The design of an early foglight LED board has begun. mepstein sent me a couple of foglight fixtures to use to design the board. 2 main issues are fitment and heat dissipation. If things work out ok the design should be able to be re-laid out for the later square foglight.
The board will have 8 Cree XP-G3 high power surface mount LEDs with 350ma current each. These will burn about 1W of power with a total power dissipation expected to be less than 10W. Hopefully these will be almost as bright as a headlight. Each LED will have its own focusing lens. The lenses are Carclo 10192 elliptical 20mm lenses. The light pattern for the 10192 lens is shown below.  This is the spectral dispersion for the lens.  |
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Replies
| Al Meredith |
Apr 23 2019, 03:39 PM
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#2
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Senior Member Group: Members Posts: 969 Joined: 4-November 04 From: Atlanta, ga Member No.: 3,061 |
would it make sense to have two levels, one for running / daytime and one for night time use. the heat for daytime running would be decreased . AL
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| Spoke |
Apr 24 2019, 06:50 AM
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#3
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Jerry Group: Members Posts: 7,104 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None
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QUOTE(Al Meredith @ Apr 23 2019, 05:39 PM)  would it make sense to have two levels, one for running / daytime and one for night time use. the heat for daytime running would be decreased . AL It is possible to do that. Also most LED drivers have an input to dim or decrease the current. By putting a negative temperature coefficient resistor on the input, the current can be decreased by an increase in temperature. |
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Posts in this topic
Spoke LED Foglight Project Apr 13 2019, 08:45 AM
Spoke The LEDs will be connected in series and driven by... Apr 13 2019, 08:51 AM Spoke This is what the board looks like right now. It ma... Apr 13 2019, 08:58 AM mepstein I don't understand any of this but it sure loo... Apr 13 2019, 12:16 PM StratPlayer Will you be making these for the rectangle style f... Apr 13 2019, 01:34 PM
Spoke
Will you be making these for the rectangle style ... Apr 14 2019, 05:57 AM
Spoke
Will you be making these for the rectangle style ... May 9 2019, 07:24 PM mepstein
[quote name='StratPlayer' post='2704950' date='Ap... May 9 2019, 07:37 PM DRPHIL914
[quote name='StratPlayer' post='2704950' date='Ap... May 10 2019, 08:13 AM Luke M I'd be in for an early set once you get them d... Apr 13 2019, 02:11 PM 914-300Hemi Looks great Spoke. Apr 14 2019, 06:05 AM Spoke This is the fixture I'll use to size the board... Apr 14 2019, 06:09 AM Spoke I printed the PCB front and bottom sides since I c... Apr 14 2019, 06:15 AM Spoke With the spacer attached, now the PCB can sit squa... Apr 14 2019, 06:21 AM Tbrown4x4 I'm totally supporting this. I drive at night ... Apr 14 2019, 07:09 AM mepstein
I'm totally supporting this. I drive at night... Apr 14 2019, 10:45 AM mb911 Really excited for this although currently I only ... Apr 14 2019, 09:27 AM mepstein
Really excited for this although currently I only... Apr 14 2019, 10:33 AM Tbrown4x4 Good to know! I think I have these on an Amazo... Apr 15 2019, 05:02 AM orthobiz This is great, thanks. I posted some lens pictures... Apr 15 2019, 03:31 PM Spoke
This is great, thanks. I posted some lens picture... Apr 15 2019, 07:49 PM Mike Bellis Why not mount the power supply remote in an IP65/6... Apr 15 2019, 07:22 PM Spoke
Why not mount the power supply remote in an IP65/... Apr 15 2019, 07:53 PM Spoke OK, the PCBs have been sent to the fab house. Shou... Apr 16 2019, 09:12 PM FlacaProductions I deal with color temp every day. 3200 is tungsten... Apr 16 2019, 11:08 PM windforfun
I deal with color temp every day. 3200 is tungste... Apr 23 2019, 04:02 PM orthobiz Why do these need a converter when your other tail... Apr 17 2019, 12:26 PM Spoke
Why do these need a converter when your other tai... Apr 17 2019, 06:44 PM Morrie Ideally you would have a converter with no resisto... Apr 17 2019, 07:58 PM Spoke
Ideally you would have a converter with no resist... Apr 19 2019, 02:34 PM orthobiz
[quote name='orthobiz' post='2706213... Apr 17 2019, 08:06 PM 914forme PDBs going to be green or black in the final versi... Apr 17 2019, 08:22 PM Spoke
PDBs going to be green or black in the final vers... Apr 18 2019, 08:02 PM ClayPerrine
[quote name='914forme' post='2706330' date='Apr 1... Apr 19 2019, 02:40 PM Mblizzard I will be in for a set of squares. Last lights on... Apr 18 2019, 12:18 PM eric9144 This is pretty awesome and totally something I... Apr 18 2019, 01:57 PM 76-914 :popcorn: Apr 19 2019, 07:16 AM ValcoOscar Same here... :popcorn: :popcorn: :popcorn:
I s... Apr 19 2019, 07:33 AM DRPHIL914 thanks for taking this on! I asked about this ... Apr 19 2019, 07:38 AM Spoke
I agree about the comments on color, you don... Apr 19 2019, 02:39 PM Spoke To reduce component and assembly cost, I'm loo... Apr 22 2019, 06:59 PM Chi-town Just a thought but if you're using a LED chip ... Apr 24 2019, 09:25 AM Spoke
Just a thought but if you're using a LED chip... Apr 24 2019, 11:11 AM Spoke Have the PCBs in hand. Will assemble the first boa... Apr 26 2019, 08:01 AM Spoke Here's the PCB under the glass. It will be int... Apr 26 2019, 08:03 AM DRPHIL914 :popcorn:
Looking good! Cant wait to see the... Apr 26 2019, 08:06 AM Spoke Things like this happen when you set the temperatu... Apr 29 2019, 01:55 PM mepstein
Things like this happen when you set the temperat... Apr 29 2019, 02:14 PM Spoke With the correct settings, the oven worked fine.
... Apr 29 2019, 03:06 PM Spoke All lit up with LED lenses. Won't be able to c... Apr 29 2019, 03:10 PM Spoke Printed a jig to drill the heat sink for tapping. ... Apr 29 2019, 03:13 PM Spoke Here's the light pattern with 0.5A per LED on ... Apr 29 2019, 03:43 PM Spoke The glass lens fits nicely with the printed spacer... Apr 29 2019, 03:46 PM Spoke Here's the light pattern with 0.5A with the gl... Apr 29 2019, 03:48 PM Spoke Redesigned the spacer rings so the boards can scre... Apr 29 2019, 04:49 PM Spoke These are the wrong screws. These are #4 x 5/16 wh... Apr 29 2019, 04:51 PM Spoke The first fully built up PCB. Somehow I managed to... Apr 30 2019, 04:10 AM Spoke Started doing some burn in on the first unit. Will... Apr 30 2019, 04:15 AM jkb944t
Started doing some burn in on the first unit. Wil... Apr 30 2019, 06:15 AM DRPHIL914 Looks great!!! Cant wait to get a set... Apr 30 2019, 05:54 AM Spoke Burned in the prototype for about 20 hours this we... May 3 2019, 07:59 PM Spoke The metal clips will need to be made for each unit... May 3 2019, 08:01 PM Spoke The PCB fits nicely in the case. Will run this for... May 3 2019, 08:04 PM Spoke Not sure how to connect up to the existing wires y... May 3 2019, 08:07 PM ClayPerrine http://www.914world.com/bbs2/uploads_offsite/i.kym... May 3 2019, 08:50 PM Chi-town Can you take a pic of the light output on a wall f... May 3 2019, 09:58 PM Spoke This is the light pattern projected on the ceiling... May 4 2019, 05:42 AM Spoke Got the prototype lit up in the foglight enclosure... May 5 2019, 02:13 PM Spoke Compared the output of the LED foglight to the fog... May 6 2019, 09:52 PM Spoke The driver side foglight is covered up and the LED... May 6 2019, 09:57 PM Chi-town That upper washout will be blinding to oncoming tr... May 6 2019, 10:48 PM Luke M Would the fog light lens make a difference ?
I do ... May 7 2019, 07:43 AM Spoke
Would the fog light lens make a difference ?
I do... May 7 2019, 05:21 PM mepstein
Would the fog light lens make a difference ?
I d... May 7 2019, 05:28 PM Spoke
[quote name='Luke M' post='2711759' date='May 7 ... May 7 2019, 05:35 PM mepstein
[quote name='mepstein' post='2711910' date='May 7... May 7 2019, 06:01 PM Spoke
I have two early sets I can send you. One questi... May 7 2019, 06:21 PM mepstein
I have two early sets I can send you. One quest... May 7 2019, 06:45 PM JeffBowlsby Open the housing and disconnect the wires! No... May 7 2019, 06:55 PM worn
Open the housing and disconnect the wires! N... May 7 2019, 07:54 PM Spoke
Open the housing and disconnect the wires! N... May 8 2019, 08:02 PM Spoke I'm working on a 911 variant of the foglight l... May 9 2019, 07:12 PM mepstein Early ones are on their way. They are in much bett... May 9 2019, 07:23 PM Chi-town Sorry no fogs on my 75' May 9 2019, 08:48 PM Chi-town Are you going to try different optics or main lens... May 10 2019, 08:32 AM mepstein
Are you going to try different optics or main len... May 10 2019, 08:42 AM Luke M
[quote name='Chi-town' post='2712683' date='... May 10 2019, 10:31 AM Spoke
Are you going to try different optics or main len... May 10 2019, 02:54 PM Chi-town There's a big difference between an old 35 wat... May 10 2019, 12:09 PM Spoke Put the board into one of the fixtures provided by... Jun 1 2019, 06:52 AM mepstein
Put the board into one of the fixtures provided b... Jun 1 2019, 07:02 AM Spoke The early lenses are at least 5mm deeper than the ... Jun 1 2019, 06:53 AM Spoke Does anyone make the rubber gasket that goes aroun... Jun 1 2019, 07:04 AM Chi-town 914 Rubber makes them Jun 1 2019, 08:13 AM Spoke
914 Rubber makes them
Thanks. I ordered 2 sets.... Jun 1 2019, 09:13 AM Mikey914 Ill make sure they get cross listed. We also ma in... Jun 1 2019, 09:54 PM Spoke Finally got the 2nd 914 foglight assembled. This d... Jun 11 2019, 07:44 PM Spoke Here's the 911 foglight fitted in the lens. Th... Jun 11 2019, 07:47 PM |
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