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 Post subject: cut 'n' shut tesco torch
PostPosted: Sun Nov 16, 2008 11:58 am 
Dirt Disciple

Joined: Mon Nov 21, 2005 3:45 pm
Posts: 23
Thanks for the positive comments guy's, here are the basics on how to do the conversion.

the mods to the torches involves :

disassemble torch into 3 main parts (end cap with switch, main body, and LED/lens unit). cut approx 55mm of main body with good hacksaw, making sure you do not damage threads for lens unit.

dissasemble LED/lens unit and you will see that there is a small inbuilt current regulation circuit, unsolder this and run 2 new leads from LED module.

using the wonder of the web, do a search on 'dealextreme' for the mounts shown, they are a tight fit on the body of the torch, but with a bit of persuasion they wil fit. For the driver cards I went for some cheap 700mA fixed output types from ebay (look under seller 'sureelectronics').

I decided not to use the existing switch module, and simply got some suitable blanking plugs to fit the cut end of the torch bodies, the ones I found are plastic units that are commonly found at most electronics suppliers. these were then centre drilled and fitted with some simple and small waterproof on/off switches from Maplins.

Wiring is fairly simple - from the 7.2V battery pack I am running the 2 light units in parallel NOT series. the drivers need to be wired up with the +/- output to the appropiate wires of the LED's.

the negative (-) lead of the battery is run to the negative (-) input terminal of the driver cards, the positive of the battery is run up and through the switch units and then to the positive terminal of the driver card input.

the tricky bit really is getting the driver card and wiring all inside the cut down body section as space is a little tight. the wiring that passes out to the battery pack goes through a waterproof gromit mounted under the bracket assembly to keep it out of direct water spray.

the battery itself is mounted in a nylon fabric holder that mounts via velcro straps to the frame top tube. these holders are found on ebay as accesories used by 'airsoft' enthusiasts.

rough breakdown on prices are :

2 x tesco C-cell torches : £22
2 x mounts from dealextreme : £3.50
2 x driver cards from ebay : £11
2 x switches from maplins : £4
odds n sods (blanking plugs, wire, etc) : £3
battery pack holder from ebay : £4

battery packs can be got from ebay for approx £18 - £24

hope this helps a little, but any more questions let me know :D

cheers - UZ


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 Post subject:
PostPosted: Sun Nov 16, 2008 12:05 pm 
Retro Guru
User avatar

Joined: Thu Jul 07, 2005 7:16 pm
Posts: 1202
Location: U.K
hi
home made lights aer good cos you can spec your lights to suit your needs but as a lot of light manufactors are getting into building lights with ssc p7 leds and li-ion battery are getting very cheap now.you can get a p7 700 lumens light from air bike for about £118 but if you have the time and DIY know how home made is better

these are some i made last year
Image
900 lumens but will be about 1200 lumens when i fit the new drivers but ive bought a 900 lumens p7 thorch from deal extreme
thorch £15
7.4v 6000mah li-ion battery + charger £18
3 stage driver £6
cables and various bits £10
so all in i should get 850 lumens for £49
thwang


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 Post subject: lightsssssssss
PostPosted: Sun Nov 16, 2008 4:09 pm 
Retro Guru
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Joined: Sun Oct 14, 2007 12:31 pm
Posts: 669
Location: The Far East
well heres mine not bad for just a tad over 24 quid .....


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 Post subject:
PostPosted: Sun Nov 16, 2008 6:00 pm 
Retro Guru
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Joined: Mon Dec 24, 2007 7:54 pm
Posts: 594
Location: Derbyshire
Mattythemod,
where did you get those brackets from then?


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 Post subject:
PostPosted: Sun Nov 16, 2008 7:11 pm 
Retro Guru
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Joined: Sun Oct 14, 2007 12:31 pm
Posts: 669
Location: The Far East
doogie wrote:
Mattythemod,
where did you get those brackets from then?


here u go mate , took 5 days from order to delivery on my doorstep ...

the brackets are a little large for the smallest Tesco Torch so an old inner tube wrapped round the barrel of the torch does the trick !!

http://www.dealextreme.com/details.dx/sku.15642


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 Post subject:
PostPosted: Sun Nov 16, 2008 7:36 pm 
King of the Skip Monkeys
King of the Skip Monkeys
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Joined: Wed Nov 07, 2007 4:34 pm
Posts: 26168
Location: Moomin Valley
DONT CHUCK AWAY YOUR CATEYE REFLECTOR BRACKETS!

they make perfect torch holders...


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 Post subject:
PostPosted: Sat Nov 22, 2008 11:41 pm 
Gold Trader
Gold Trader
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Joined: Sun Aug 10, 2008 3:13 pm
Posts: 3098
Location: on the trail
well i decided to go for a couple of the tesco cree lights as the seem very good value
so went to buy some but my tesco,s only has the c cell versions :(
does any one have a tesco thats got the aa cells version in stock?
that dont mind grabbing me a couple and then posting them to me??
i will of course cover all costs :wink:

rob


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 Post subject: Re: tesco torch's
PostPosted: Sun Nov 23, 2008 12:25 am 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider
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Joined: Fri Sep 05, 2008 6:36 pm
Posts: 4950
Location: Edinburgh
Image

have you tried mounting them on the underside of the bars mate?
that would look "The dugs baws" :lol:

GC


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 Post subject:
PostPosted: Sun Nov 23, 2008 1:48 am 
Retro Guru
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Joined: Mon Dec 24, 2007 7:54 pm
Posts: 594
Location: Derbyshire
Rob,
if you want some I don't mind going to get some for you and posting them on to you. :wink:


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