Author Topic: Sourcing LED and components for self build lights  (Read 495 times)

Offline MaartinF

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Sourcing LED and components for self build lights
« on: October 29, 2021, 11:12:02 am »
Hi All,
After a couple of fallow years, I'm now revisiting an old project of mine to convert some old Oldham headsets to LEDs.  All the old sites I used to source LEDs (Cree XL/XM) and drivers are now either defunct or dollar price only.  Any suggestions on reliable sources for these?
Thanks
Martin

UK Caving

Sourcing LED and components for self build lights
« on: October 29, 2021, 11:12:02 am »
Warmbac

Offline Cantclimbtom

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Re: Sourcing LED and components for self build lights
« Reply #1 on: October 29, 2021, 11:31:43 am »
At risk of stating the obvious... http://www.customduo.co.uk/Pitlamp-Module-Fitting/
Expert in incompetent tomfoolery

Offline MaartinF

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Re: Sourcing LED and components for self build lights
« Reply #2 on: October 29, 2021, 11:41:25 am »
Thanks
Yes, I could just buy the (excellent) inserts, but having acquired a number of redundant sets, I was fancying a winter challenge of pure DIY - I don't intend these for serious use , as my main light is a Dragon from Mr. Fellows, but more of simple lend sets, and maybe for a couple of other home lighting projects.

Online droid

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Re: Sourcing LED and components for self build lights
« Reply #3 on: October 29, 2021, 12:51:42 pm »
Fastech (or summa like that Roy knows)
No longer 'Exceptionally antagonistic' 'Deliberately inflammatory'

Offline royfellows

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Re: Sourcing LED and components for self build lights
« Reply #4 on: October 29, 2021, 02:08:40 pm »
https://www.fasttech.com/

You pay by PayPal and its converted into dollars no no issues.
To covert an Oldham make a flat plate of aluminium or SWG 22 copper to fit into the lamp after dumping bulb holders. Mount drivers on the rear and LEDs on the front.

Best for low voltage are 7135 based drivers, but beware of silly flashes and strobes. You can remove the anti reverse polarity diode which wastes 0.33 volts (assuming Schottky) off whatever battery is supplying. The drivers are for torches and the diode is to safeguard against silly buggers putting batteries in the wrong way round. Standard diodes waste 0.7V.

Each 7135 gives 350mA, so they paralleled. For a multi mode you will get about 50mA on top off the microcontroller.

Another good supplier is kaidomain, they do a lot of the stuff without the flashes, or you can solder a little bridge to get rid of them.
http://www.kaidomain.com/

If is a 7135 based multimode, you can take one 7135 out of the microcontroller to set a realistic bottom brightness level.

Remember that if you a first timer when you start modding stuff you will start trashing stuff, so best buy in  a few of everything.
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Offline MaartinF

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Re: Sourcing LED and components for self build lights
« Reply #5 on: October 30, 2021, 08:43:51 am »
Thanks for that, if all goes well, I'll report back - but I'll keep quiet about all the ones that end up in the bin....

Martin

Offline AlexR

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Re: Sourcing LED and components for self build lights
« Reply #6 on: October 30, 2021, 02:08:02 pm »
Another good supplier for "naked" LED's is RS components BUT they're generally sold without the MCPCBs surface mount LEDs live on and you'll have to sift through quite a few Cree data sheets to get the correct one (bin, colour, etc.).

Mountain Electronics was great for all your light building needs until they stopped shipping to the UK.

More useful for updating say Scurion LEDs, having a play around and making specialised lights (in my case I wanted very high CRI).

Offline royfellows

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Re: Sourcing LED and components for self build lights
« Reply #7 on: October 31, 2021, 06:26:54 pm »
Just found this browsing FastTech

https://www.fasttech.com/p/1122302

The lowest mode is too low you will find, so use a craft knife to take one of the 7135 chips away from the microcontroller, dump the schottky, and resolder as necessary the orphaned chip.

The is another similar one.
My avatar is a poor likeness.

 

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