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Making a torch

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Sam Longley 117/12/2018 22:24:43
722 forum posts
26 photos

Yeah!!! I know that one can buy them dead cheap (Or pay a fortune) but you can also buy a biro for pennies & people still make pens!!

So has anyone tried making a torch. Perhaps a nice aluminium  rechargeable one? Coloured, anodised barrel perhaps. LED's or Zenon ( what should one use?) Are there any designs out there to follow?

I want a nice handy powerful round rechargeable one for the boat that will not go flat in five minutes & be there when I need it & not just glimmer at me & die.

Edited By Sam Longley 1 on 17/12/2018 22:25:50

pgk pgk17/12/2018 22:33:27
1453 forum posts
282 photos

Led automobile headlight and a moderate 12v leisure battery??

Michael Gilligan17/12/2018 22:58:40
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14014 forum posts
608 photos
Posted by Sam Longley 1 on 17/12/2018 22:24:43:

I want a nice handy powerful round rechargeable one for the boat that will not go flat in five minutes

.

LED beats Xenon for that ^^^

This is probably the best place to start your research : **LINK**

http://www.candlepowerforums.com/

Loads of technical information, and lots of discussion !

MichaelG.

Clive Hartland17/12/2018 23:17:45
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2473 forum posts
40 photos

I bought a Workzone one from Lidl. It has a 200 mtr. beam and two levels of power and a flashing light as well. £19.99 Charger comes with it.

not done it yet17/12/2018 23:24:05
3364 forum posts
11 photos

With a bouyancy aid built in?smiley

Cabinet Enforcer17/12/2018 23:46:54
46 forum posts
2 photos
Posted by Michael Gilligan on 17/12/2018 22:58:40:
Posted by Sam Longley 1 on 17/12/2018 22:24:43:

I want a nice handy powerful round rechargeable one for the boat that will not go flat in five minutes

.

LED beats Xenon for that ^^^

This is probably the best place to start your research : **LINK**

http://www.candlepowerforums.com/

Loads of technical information, and lots of discussion !

MichaelG.

CPF used to be the best (only?) place for flashaholics but if your interest is in making your own within reasonable constraints, then http://budgetlightforum.com is probably the most useful now.

Some of the blf designed Chinese made torches are fantastic value, but if you have an old d cell maglite lying around then a proper led conversion is a nice little project.

duncan webster17/12/2018 23:51:41
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2232 forum posts
32 photos

I've got a D cell Maglite, if anyone wants it is there for the cost of postage, or pick up from north Cheshire

Michael Gilligan18/12/2018 00:10:23
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14014 forum posts
608 photos
Posted by Cabinet Enforcer on 17/12/2018 23:46:54:

CPF used to be the best (only?) place for flashaholics but if your interest is in making your own within reasonable constraints, then http://budgetlightforum.com is probably the most useful now.

.

Thanks for that

http://budgetlightforum.com

MichaelG.

Edited By Michael Gilligan on 18/12/2018 00:11:48

Ady118/12/2018 00:27:36
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3463 forum posts
513 photos

Got some of these at morrisons, three quid each, orange ones, found this black one recently at TK max

Runs on 3 x AAs for up to six months

They use a rheostat switch and on the low setting they have an amazing single charge lifespan, never come across anything else like it

So consider a dimmer switch as part of your super dooper torch

Bill Pudney18/12/2018 03:33:57
421 forum posts
16 photos

Years and years ago, decades even, one of the young engineers pet projects was a thing known as a "Battle Torch". Machined from solid high grade al. alloy, with specially set up optics, and a ni cad battery. It was indeed an impressive piece of kit, very good light, very solid, almost indestructible, just what the Army wanted. At a bid review where it was announced that the cost, (the "cost", not the selling price) was over $500. One of the more cynical people plopped a metal torch on the table and said...."Bunnings, $20, it does everything the Battle Torch does"

Guess who got his nose out of joint.

Merry Christmas

cheers

Bill

Ady118/12/2018 09:19:01
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3463 forum posts
513 photos

If you search for cree torch on ebay the choice is ridiculous

3 for a tenner

correction: 5 for a tenner

Edited By Ady1 on 18/12/2018 09:20:55

Roger Provins 218/12/2018 09:45:05
342 forum posts

I'd build something using leds and 18650 3.7v 4250 mAh cells.

Michael Gilligan18/12/2018 09:54:14
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14014 forum posts
608 photos
Posted by Roger Provins 2 on 18/12/2018 09:45:05:

I'd build something using leds and 18650 3.7v 4250 mAh cells.

.

At last we are getting back on topic

Thanks Roger yes

MichaelG.

Sam Longley 118/12/2018 10:19:42
722 forum posts
26 photos

As I said in my original post--we can all buy biros for pennies - But??

Machining the aluminium, cutting the threads, - nice fine ones so it feels like quality-anodising the case, making the clip & decent knurling. Battery fixings could be fiddly & a job for a printer.

I am sure that i could work out something for a reflector or LED mounting & perhaps use a small magnifying glass lense for the glass. Would that work? Focal length & all that.

Not sure about the electronics & that is where I was hoping to get some comment. Switch could be a screwed base.

It was only a thought for a project different to the run of the mill steam engines etc etc

 

Edited By Sam Longley 1 on 18/12/2018 10:22:53

Michael Gilligan18/12/2018 10:31:17
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14014 forum posts
608 photos
Posted by Sam Longley 1 on 18/12/2018 10:19:42:

Machining the aluminium, cutting the threads, - nice fine ones so it feels like quality-anodising the case, making the clip & decent knurling.

.

For use on a boat, Sam ... I would think twice before using Aluminium

MichaelG.

Sam Longley 118/12/2018 10:42:21
722 forum posts
26 photos

The Aeries self steering is alumnium & is 40 years old. It is anodised. The torch will not get wet so I am not worried about it being aluminium. thanks.

But, that being said, what would you suggest as an alternative that is easy to machine , turn, thread & mill flats on etc?

Neil Wyatt18/12/2018 11:13:17
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Moderator
16570 forum posts
687 photos
75 articles

One of my first lathe projects was an aluminium and brass torch with a push-button switch at the back and a blue LED (you couldn't get cheap white ones in 1999).

Neil

Found it!

torch.jpg

Edited By Neil Wyatt on 18/12/2018 11:32:48

larry phelan 118/12/2018 12:09:21
503 forum posts
11 photos

Saw something like that on Ali Express,very useful when walking alone,and I think you can even use it as a torch as well !

Worth checking out.

Bazyle18/12/2018 12:18:38
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4724 forum posts
186 photos

Since a reflector is useful but hard to make I'd get a cheap torch to cannibalise for that but make a body (wood for buoyancy) with a bigger battery. Perhaps have some fun with a trick or hidden switch. I think torch making is a hobby in its own right in the 'states, like pen making, pointless but fun for some.

Perko718/12/2018 12:22:17
280 forum posts
23 photos

Some years ago I bought a 'shaker' LED torch for about $10. It had an in-built generator which recharged the 'battery' (more likely a bank of capacitors) when you 'shook' the torch back and forth. When doing this it rattled, a bit like shaking a spray can of paint. I assume it consisted of a free-floating magnetic bobbin inside a coil. Was intended for marine use so would float and was waterproof (meaning moulded plastic body with all joints glued or fused together, no external openings, no on/off switch etc)

Worked well, lasted about 1/2hr before needing to be shaken again, but this could go on indefinitely. 30 seconds of shaking would fully re-charge it. In practice I would tend to shake it little and often to keep the 'tank' topped up.

Only got rid of it when the electronics failed and could not be bothered pulling it apart to see why. Could be an interesting exercise to try and replicate??

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