I'm back again. Now I finished the 3-LED-testdevice.
XR-E WD R2 and Carclo 10170 and internally etched glass lens @50mA
Diffus-part: Same XR-E WD R2 and Carclo 10170 and internally etched glass lens @150mA(low)/250mA(high)
Light-up: One die of MC-E WD M and Carclo 10195 and clear glass lens @30mA(low)/125mA(high)
All four dies of same MC-E WD M and Carclo 10195 and clear glass lens @4x750mA
XR-E WC R2 and aspherical glass lens 21,5mm dia x 20mm fl @1150mA
In the lab it works similar to the former 4-LED-testdevice.
We will test it at the weekend 8/9 August in Hirlatzhöhle - I will post some results, shure.
If this new test device holds what it promisses in laboratory, I'm finished developing a reasonable headlamp for big caves. In this case I will post circuit diagram, layout and mechanical specifications, so everyone can build such a lamp by its own. It's rather for self made man than for commercial manufacturer. But may be there will be some manufacturer taking the ideas and developing a commercial device from it - would be very interesting!
We started a poll on our caving club website to find out the wishes and requirements of cavers with respect to helmet lamps.
The more cavers participate, the better the data basis to develop new improved headlamps.