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Author Fellows lamps forum.
sinker

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Posted: 09/09/2015 17:27:31
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Does the new "RedBand" pack work with the EcoStar? Flowers

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royfellows

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Posted: 09/09/2015 17:54:12
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sinker wrote:

Does the new "RedBand" pack work with the EcoStar? Flowers


Eco is a low voltage lamp and I will be testing a low voltage pack later this week, I cant see any issues.
Answer to your question is yes, most definitely. I would expect standard mode to sustain output for about 20 hours before diminishing into the 'slow death' routine. As I said, testing will be a soul destroying job.

Mmm, 200 lumens for 20 hours from a matchbox size battery, what's he been drinking?
Laugh

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sinker

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Posted: 09/09/2015 18:34:13
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royfellows wrote:



Eco is a low voltage lamp and I will be testing a low voltage pack later this week, I cant see any issues.
Answer to your question is yes, most definitely.....

what's he been drinking?
Laugh



Thumb Up Ok Roy I'll give it a whirl. I'll e-mail you later.


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royfellows

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Posted: 10/09/2015 09:06:43
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Hi again
This is a very crude attempt at a graph showing discharge performance of the D1200 with the new power pack. I say crude as an accurate representation would require a constant monitoring and automated data feed. Also lumens are estimated as best as I can from Cree data sheet.

It was interesting to observe the current flow at the point where battery voltage falls to the forward voltage of the LEDs. There was a rise in the current in to a peak point and then a falling back. I should get a life.

You will have to double click the image to get a clear picture, sorry.

I will start on a low voltage pack shortly and upload results.

Four cell high voltage packs will be weeks away, so anyone purchasing a bat cooker will have to have existing tech, but I will probably discount a new pack when they become available.



(click image to open full size image in new window)

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IP: 92.19.60.189 Edited: 10/09/2015 09:10:00 by royfellows
royfellows

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Posted: 10/09/2015 18:54:16
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I have a low voltage red band pack on charge, soon be ready to put on test.

Anyway, I really would like to reminisce a bit.

My original lamp thread is still on here, started thus: My Oldham conversions 11/02/2009
Later in the year this was built:



(click image to open full size image in new window)

Eventually developed into the UniStar and the first was sold to Peter Jackson. Its still going strong isn't it Peter?

Same year the first MagnumStar:



(click image to open full size image in new window)

5 Cree Q5 XREs and I was the first person to put over 1000 lumens on someone's head, long before the Chinese Bike lamps and headtorches

From the original thread, September 2009:
"I tested the MagnumStar underground in 3 mines this weekend, a slate mine, Ystrad Einion, and Goginan 26 fathom level; the upper adit. (Please note that the last is currently padlocked as I have one of my digging ops on the go in there and it’s a bit dodgy at the working end)"

and its still locked and dig going on six years later!

First EcoStar was May 2010 and used XPGs, these came out before the XMLs.

First Trigon was June 2010 utilising 2 X XPGs and an alternative XRE.

For some time I was waffling on about my heatsinking utilising some mysterious thermodynamic effect, looking back this is not entirely BS. The effectiveness of the old MagnumStars heatsinking, considering the job it was doing compares with the 12V aluminium Lynx X6000. Although I have to say that the Lynx X3000 is sustainable under most underground conditions, now an all aluminium handlamp that I built driving 3 XMLs at full chat from a 12V supply heats up very fast, the old Maggie beats it on getting rid of the heat.

It the double heat track that makes the Lynx, no doubt about it.

Anyway, I like to go on a bit now and again, hope this provides some entertainment.

EDIT
Here's that handlamp



(click image to open full size image in new window)


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IP: 2.98.235.25 Edited: 10/09/2015 19:02:31 by royfellows
ant89

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Posted: 10/09/2015 20:31:10
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Reading through your old thread, and you said on page six

"The only thing is, a lamp that is ultra light and no bigger than a matchbox, but outshines car headlamps, is an impossibility at the current state of technology."

How far off this are you now?
IP: 146.199.186.157
ttxela

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Posted: 10/09/2015 20:38:33
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royfellows wrote:



Same year the first MagnumStar:



(click image to open full size image in new window)

5 Cree Q5 XREs and I was the first person to put over 1000 lumens on someone's head, long before the Chinese Bike lamps and headtorches



And mine is still going strong, hopefully in use this weekend Thumb Up
IP: 109.157.17.231 Edited: 10/09/2015 20:39:26 by ttxela
royfellows

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Posted: 10/09/2015 21:30:32
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Thank you all for your kind support, I only do it because I'm interested in it.
Don't make a lot of money, but get a kick out of seeing people using my lamps.

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royfellows

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Posted: 10/09/2015 21:41:12
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ant89 wrote:

Reading through your old thread, and you said on page six

"The only thing is, a lamp that is ultra light and no bigger than a matchbox, but outshines car headlamps, is an impossibility at the current state of technology."

How far off this are you now?


I think that depends on where LED technology goes. There is only so much you can do with the lamp. The trend is towards lower forward voltages with more light and less heat. The old Q5 XRE was a fierce little heat producer.

The latest XPG, XML, XPL etc produces useful light at silly low currents, impossible to calculate from the data sheet cause its off the scale, but its there to be seen. Start connecting them up in arrays and you get a surprising amount of light at a few milliamps

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royfellows

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Posted: 11/09/2015 18:43:10
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I have just completed testing a D800 on standard 200 lumens and got a remarkable 18 hours before any fall in output, its still burning now over 22 hours later.

I will be testing on full and medium next week and putting a graph up.

The Dragon D800 is same electronics as the Lynx X1000, basically 7135 linear chips controlled by an Atmel microcontroller. One of the 7135s is external to the controller as a failsafe, if the controller goes it will still output its 350 mA. Standard is 400 mA, Full is 1800 mA, the sum of the 7135s plus a bit the controller adds on.

Apart from that Iin is same as Iout which make it easy to monitor

A couple of other things, cause the higher voltage pack is serial it charges twice as fast as the low voltage, 2S against 2P dividing the input current, also the 'slow death' of the higher voltage serial pack seems slower then the other.
A bit of cross dressing methinks
Laugh

EDIT
I think I may have set a new record for burn times here!

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IP: 2.98.235.25 Edited: 11/09/2015 18:50:00 by royfellows
PeteJ

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Posted: 11/09/2015 19:05:23
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Yes Roy! And the light colour is good for photos underground

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IP: 146.199.39.170
royfellows

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Posted: 16/09/2015 16:14:45
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Here is the discharge graph for the D800.



(click image to open full size image in new window)

As can be seen the burn time on the standard mode is ridiculous, 18 hours at the full 200 lumens and then the slow death. Power settings not impressive with a rapid fall off.

D800 is the lamp for those who just want a sensible reliable lamp for use in company, plus advantage of a powerful flood for photos.
D1200 for those who want sustainable power settings, but now also has the reliability of the slow death rather than a sudden immediate loss of light when the battery goes.

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royfellows

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Posted: 08/10/2015 21:00:40
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Just an update.

The good news: I have now fully depleted my old stocks of power packs so all power packs supplied with everything except X6000s including Oldham conversions are red band with the ridiculous long burn times.

X6000 belt packs are now Sanyo cells, fewer cells for virtually same burn times = lighter battery

The bad news: Stocks have run low, sorry.

Also, a lot of outdated info on the website, sorry again.

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Vanoord

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Posted: 08/10/2015 22:30:58
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royfellows wrote:



I think that depends on where LED technology goes. There is only so much you can do with the lamp. The trend is towards lower forward voltages with more light and less heat. The old Q5 XRE was a fierce little heat producer.

The latest XPG, XML, XPL etc produces useful light at silly low currents, impossible to calculate from the data sheet cause its off the scale, but its there to be seen. Start connecting them up in arrays and you get a surprising amount of light at a few milliamps


We seem to be on the brink of another leap in outputs - unless my eyes are deceiving me, 1,000 lumens from two AAs is about to be hit by Fenix. Impressive enough, but what can that sort of emitter manage with a couple of 18650s?

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royfellows

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Posted: 09/10/2015 09:30:24
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Vanoord wrote:

royfellows wrote:



I think that depends on where LED technology goes. There is only so much you can do with the lamp. The trend is towards lower forward voltages with more light and less heat. The old Q5 XRE was a fierce little heat producer.

The latest XPG, XML, XPL etc produces useful light at silly low currents, impossible to calculate from the data sheet cause its off the scale, but its there to be seen. Start connecting them up in arrays and you get a surprising amount of light at a few milliamps


We seem to be on the brink of another leap in outputs - unless my eyes are deceiving me, 1,000 lumens from two AAs is about to be hit by Fenix. Impressive enough, but what can that sort of emitter manage with a couple of 18650s?


Boost circuit
Works well with NiMH because they can be run dry. This is a no no with Li Ion.

--

...power is not physical strength, it comes from a lack of intent, an absence of mind, and is generated at the Hara which must be ones centre of gravity.
IP: 88.105.243.184
royfellows

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Posted: 30/10/2015 14:11:52
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This is just a heads up to the customers I have on here.
I have just been advised that the "Contact Us" email address on the lighting website is the now defunct iriscom domain. It looked the right one but defaulted to the old, I am thinking the software may have something to do with it. Mmm.

This has now been corrected, apologies to anyone who has been after me off the website.

Its now roy@royfellows.uk

Emails answered within the hour, unless its evening and I'm training somewhere.



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royfellows

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Posted: 07/11/2015 16:03:29
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I am announcing a new 'Flat pack' version of my 8V series 4 cell power pack. Its 7 Ah with same cells announced as 'red band' and is explosion proof, water proof, shock proof and caver proof same as old. Its flat profile should be a lot less obtrusive than the old, its also lighter at 300 grams.

I believe that I am the only lamp manufacturer currently offering power packs of this type, whereby they can just be unplugged and swapped underground with a spare. They can be changed under water if you want.



(click image to open full size image in new window)

Bad new is the only one in stock is sold with a lamp, awaiting components at the moment.

--

...power is not physical strength, it comes from a lack of intent, an absence of mind, and is generated at the Hara which must be ones centre of gravity.
IP: 88.105.211.2 Edited: 07/11/2015 16:04:07 by royfellows
NewStuff

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Posted: 08/11/2015 00:36:43
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royfellows wrote:

Boost circuit
Works well with NiMH because they can be run dry. This is a no no with Li Ion.


Well, you can if you're monitoring input voltage (under load). 3v per cell warning, 2.8v cut-off.

One day I will stop the feature creep, and put my driver into a lamp. As it is, I doubt the breadboard and associated rats nest will fit into an oldham Sad

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royfellows

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Posted: 08/11/2015 09:06:21
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NewStuff wrote:

royfellows wrote:

Boost circuit
Works well with NiMH because they can be run dry. This is a no no with Li Ion.


Well, you can if you're monitoring input voltage (under load). 3v per cell warning, 2.8v cut-off.

One day I will stop the feature creep, and put my driver into a lamp. As it is, I doubt the breadboard and associated rats nest will fit into an oldham Sad


The "No no" bit referred to running dry.
My cut off and other figures are on the website, you can actually safely go a bit under 2.8V, refer to cell manufacturers data sheet.

No one seems to have the knack of being misunderstood as I do
Sad

As an afterthought, in some circumstances (the older LEDs) you can dispense with electronic cell protection, LEDs going out before the over discharge limit, and a good dedicated charger will not overcharge.

BUT
If one tests the newer ones in the lab, although the LED is out just above the safe over discharge limit, a meter will indicate that there is actually still some current flowing with some LEDs although they are out.

Crees latest and best, the XP-L glows faintly at 2.4V. The current trend of lower forward voltages.

--

...power is not physical strength, it comes from a lack of intent, an absence of mind, and is generated at the Hara which must be ones centre of gravity.
IP: 88.105.211.2 Edited: 08/11/2015 09:28:02 by royfellows
The Fresh Prince of Portreath

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Posted: 12/11/2015 11:39:35
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Due to doing more "caving" style trips, I found the belt battery I insist upon to run the RF Trigon/Magnumstar I have a bit of a hindrance. Following seeing a Scurion 700 in action and being VERY impressed with the light quality, I decided to invest in a 1500 for Caving Trips. Purely, because if you're going to bend the bank, you may as well bend it properly.

I didn't take any photos, because the camera was thinking for itself and I was far too lazy to start playing with the settings, especially in the drizzle. I was expecting the Scurion and Trigon are evenly matched. I'd go as far to say the Trigon has the better spot of the two and the floods are very similar. The MS is a completely different animal and for all intents and purposes is in a completely different league.

It's rather like a comparison between a ridiculous old hotrod with a supercharged V8 and one of those honda things. The MS just makes everything like daytime and it's quite comical, however, the Scurion is light, is compact, is a very able caving light. Ergo, I will be using that for the poky stuff. Meanwhile the MS and Trigon (depending on what's charged) will continue to be used for walky-aroundy mines like Old Wheal Jane. (Where you need all the lumens you can get).

A while ago the Scurion light quality came up for debate. I was crossing a traverse and the chap in front of me with a 700 was mucking around with a anchor. I had my light on tickover and his lit everything up in the most perfect way. It was crisp and quality. I thought "There's your price, right there". Seconds later, I turned mine back on and it was all lit up like ASDA.

It comes down to the single emitters and the crispness is down to the (particulary flood) use of one on it's own. Since the trigon has 2 point sources (flood) and the MS has 3, the crispness is lost a bit....however, you have 2 and 3 times light. Which isn't quite as obvious until you compare the lights. (Like comparing a tiger with a domestic cat).

I think there is no choice other than having 2 lamps for different occasions!

The belt battery is a headache and I insisted on having one, purely because if you're going to run a dragster on the road, you don't want to be walking to every petrol station. I don't want to think "Oohh, that bit of FULL use means that I have to be careful in the rest of this mine" or "We're going to do the Milwr Tunnel, I'd better only use LOW". I look at various creations people have strapped to their heads (in the battery dept) and think WTF! I have a big enough problem whacking everything in sight without a 10x8x5 box bolted to the back of my head! I think the battery box is something to go the extra mile with. I'm not sure how to do this, but something out of maplins is a non-starter.

Now RF has left the big oldhams behind (and the world is a lesser place as a result), the battle is fought on two pitches. (Without considering budget or non-mega-enthusiast options)

Pitch 1. Mega firepower MS style belt battery head-suns.

Pitch 2. Lightweight, helmet mounted minimal lamps with crisp light.

If I had to choose one lamp only, I would go for another MS, however, Option 2 is what a lot of people want. If you are in limited spaces, the single emitters make everything beautifully crisp.

There is a rumour that Mr Scurion uses some special custom optics which could have been responsible for the awesomeness of the light quality. I can't say I'm that impressed with the main beam. It is very much a beam, rather than a sort of limited area of extreme brightness. In this respect, I prefer the RF models. (For general mining).

I am still very much of the opinion that the MS or equivalent is the mark against which all other lamps are measured.

S
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