Need help with a custom headtorch for caving

PeterScowcroft

Newly Enlightened
Joined
Oct 1, 2006
Messages
73
Hi,

I wanted to build a headtorch for caving as the premade ones are excessively overpriced (£60 for a single bulb 3W led running off AAs seems pricey to me).

I need the torch to be able to allow a good 'spot' at about 10M; have a continous brightness; and run off batteries mountable on a helmet.

I need the torch to be able to run for about 5 hours and the ability to either swop the cell or bolt on an extra cell for a long trip.

The budget is as much as is required. I would prefer not to spend more than £50 but if there is a serious design for a little more I won't complain.


I have basic electronics knowledge but have never worked with either LED's or more importantly batteries!

What recomendations can you experts provide?

Thanks
 
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