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Overview | Extending Runtime | Beam Shapes | Housings | Switches | Modes | Drivers | AX2002 | XR-E P4 Fabrication | XP-G R5 Fabrication | Headlamp 9036-A

Caving Headlamp – Modes

By Ian Mander 24-27 January 2010, updated 26-30 October 2010, 5 November 2010.

I've come up with a bunch of modes that should suit a wide range of activities. Each bank of two paralleled LEDs has four standard modes and a separate momentary turbo mode. The two banks of LEDs are independently controllable, combining to give a total 25 modes.

Using the same mode for both banks gives the provisional results below (pending test results for driver efficiency, parasitic resistance etc). At very low currents the efficacy of the XP-G falls off. Idle mode is only about 85% as efficacious as medium (assuming equal driver efficiency). This probably isn't a problem, but for a future version is there an easy way of switching off one LED per bank or using PWM?

The figures below are purely theoretical and don't take parasitic resistance into account (most likely to affect the current the turbo drivers draw).

Overview | Extending Runtime | Beam Shapes | Housings | Switches | Modes | Drivers | AX2002 | XR-E P4 Fabrication | XP-G R5 Fabrication | Headlamp 9036-A

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