7 xpg r5 Night orienteering headlight.

[ifor powell]

This is my new homemade night orienteering headlight. It will probably get bar mounted on my bike for a couple of 24 hour MTB races over the summer.

Construction was remarkably simple using Cutters 7up XPG board with r5's and the narrow Khatod optic.

Two pieces of cut and bent aluminium 25mm corner section put together and sandwiched with the MCPCB forming the front of the sandwich and a 42mm square heatsink on the back. Held together with thermal glue and bolts it's very solid for the light weight.

Another bit of 25mm corner forms a solid top which a maxflex is attached to. Folded aluminium sheeting to enclose the driver from the light section and reflect excess spilt light from the top back down. The bottom cover below the optic is also clear again to let the spilt light down for map and foot illumination.

It is a replacement for my old light.

Which has 2 Mces and 4 Xres. The new light is about half the weight of the old one. It provided a similar nice wide beam to the old one and is also brighter at 1000ma or 1200ma. Running it at 700 or 1000ma I will be able to just use 4 18650 cells as opposed to the 8 I run with the current set-up so another weight saving.

Beamshot at full power f4 6 secs daylight WB.

More pictures.

 

[AlexGT]

Cool mod! I think it will work perfectly on a bike helmet for cycling. Does it have a low mode?

What does "night orienteering" mean? or did you mean night orientation?

 

[ifor powell]

Cool mod! I think it will work perfectly on a bike helmet for cycling. Does it have a low mode?

What does "night orienteering" mean? or did you mean night orientation?

The maxflex can be setup with 5 leves in the biking UIB2. In practice this is a reprogrammed one with none standard software and has levels at 50ma, 125, 250, 500, 750, 1000 and 1240ma.

"Orienteering is a challenging outdoor adventure sport that exercises both the mind and the body. The aim is to navigate in sequence between control points marked on a unique orienteering map and decide the best route to complete the course in the quickest time." From British Orienteetring website.

Night Orienteering is just doing it in the dark. lighting wise the main requirment is a good bright light to be able to see where your going over difficult terain and be able to navigate quickly.

 

[AlexGT]

Thanks for the explanation! You definetly got the good bright light requirement covered.

AlexGT

 

[Foliveira_PT]

The maxflex can be setup with 5 leves in the biking UIB2. In practice this is a reprogrammed one with none standard software and has levels at 50ma, 125, 250, 500, 750, 1000 and 1240ma.

Hello

I was doing a search on the internet and found this topic.

I have a setup where I use Maxflex5.

You did a change in driver? how did you manage the 1240ma?

I need to know ...

thanks.

 

[ifor powell]

The flex drivers have an Atmel Tiny85 microcontroller and I have the nessasary equipment to reprogram it, it's not too hard poking with an ossiloscope to work out what's needed to actualy get the driver going at different levels. The major problem is that you can not go back to the standard firmware if you change it and I have not gone to the effort of adding in anything like the features that are in the default. The 1240ma is just a bit up on the standard max of 1200 and turns out to be the maximum I can get for my setup. It may not be stable over all input and output setups and hense not provided as the standard maximum. As I said my main reason for reprogramming is so that I can have the light level controlled by my homemade bike computer. I also like lots of levels with manual controll.