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Headlight
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An elegant headlight was machined and assembled from scratch without
the ugly headstrap.
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A holder for attaching the headlight to my glasses was formed using Kydex,
the angle of view is fixed but set at an optimum during the forming.
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The rear of the headlight assembly is tapped for two socket cap screws used
to fasten it to the Kydex holder.
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This headlight was designed to give a smooth beam distribution with no shadows
or hotspots, providing an evenly lit and wide angle of view.
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A Cree XR-E LED emitter was chosen for its high efficiency at 80 lumens/watt.
Behind it is a current limiting driver circuit that controls the power going
into the LED with a wide input voltage range of 3~16V, this allows a great deal
of flexibility in battery options.
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A mobile phone hands free headset has been adapted as the power cable with
on/off switch, a DC connector has been fitted on the end so that different
battery combinations can be used.
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The microphone in the hands free headset has been removed and a slide switch
has been put in its place.
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An opening made in the casing allows for on/off action with the slide switch.
The original answer/end call button has been rewired for momentary on operation.
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