The 4th Annual BLF / O-L Contest; MtnDon's Entry, Hand Made Class

That’s a pint o’ light. :+1:

Well I am embarassed. :blush: I was showing the light to my son on the weekend. Suddenly I became aware that there only appeared to be three 7135 chips in place on the driver. It can be difficult to see clearly around the upper area where the mug walls turn inward and then upward again. Sure enough, close inspection found only three 7135’s. Photos before 8/27 show 4 chips! 8/27 was about when I disassebled major components as I changed some design elements. I must have lost one 7135 as I heated the upper plate to change the driver to the new plate. Or lost it during the reassembly. Too much heat and not enough attention.

I did think the run times I had obtained were impressive! Rightly so considering the light has been running at 3/4 of what I thought it was. But all to the good; 3 x 7135 do seem to be quite adequate for the lights purpose.

:slight_smile:

Doh! :person_facepalming: At least it wasn’t the mcu that fell off.

I would have noticed that a bit earlier though. :person_facepalming: :smiley:

So this morning I went and measured with meter… I should have done that before and I would have realized something was amiss.
Top row is the asked for percents for the levels, 2nd row the calculated values based on 3 x 7135 = 1.05 amps. 3rd row is measured value
2% …6% …15% …25% …50% …100%
21 mA … 64 mA … 158 mA … 262 mA … 525 mA … 1050 mA
19 mA … 59 mA … 145 mA …255 mA … 501 mA … 1031 mA
Now if I could make some lumens sense…

I don’t think a regular integrating sphere will be able to measure it with another degree of confidence given the radial output and complete lack of any “beam” so there wouldn’t be other similar lights to calibrate from. Best comparison might be measuring some standard lights with diffusion caps for relative numbers but even then the actual lumen output measured could be way off. I think “best guess” will be as close as anything.

A while ago I tried to envision a way to make a chandelier bulb by illuminating a hollow Chrystal shaped diffuser but this would be an ideal way to do that or make illuminated costume jewelry. Somebody get rich and remember me. :money_mouth_face:

I was thinking it was a problem; more a subjective thing than objective with the equipment available.

I should note that all along the planning stage I was thinking 4 x 7135’s mightbe unneeded. DBSAR is quite happy with only 2 or 3 - 7135’s on his SRK lantern project.

What’s necessary really depends on what you’re doing. I’d want more light in the OR than in my bedroom and more light for fine solder work than for cooking. For a lantern to while away the hours of a storm reading it may or may not need more. Chances are you’d be fine just sitting close enough to it.

This the the “while away the time” and not trip over stuff when the lights go out or when camping type of light. We have other assorted lights for detail work, etc. etc. Not having a super bright setting gives more of a guarantee the light will stay lit longer.

I’ve done a couple of ceiling bounce comparissons. I find they waste more light illuminating the ceiling and upper spaces. Also that doesn’t work outside. :person_facepalming:

great work I’m loving all the effort that goes into these hand made lights

Very…VERY inventive! What a thought…what an execution of the thought. You hand building guys are just tough critters. Really enjoyed the read!!

Thank you for every image & share!! TL

For the heck of it I removed the heat sink and ran the light on high, maximum 1050 mA. After a half hour the metal lid where the heat sink used to be registered 22 degrees F higher than the room ambient temperature. Considering that a prior test on level 5 (525 mA) with the heat sink in place registered 20 F above ambient, I may leave the heat sink off for a cleaner look. Using the light around home and at the cabin in the mtns. I find myself usually operating on levels 1, 2 or sometimes 3. so heat is really not much of an issue.

Nice. Haven’t been in here for some time. That’s one sweet mug-o-light you built there. Lot’s of different materials that had to be machined and brought together. Congrats :slight_smile:

Is this the first successful remote phosphor build here on BLF?

It’s the first one I’ve seen and a perfect application. I didn’t even know it existed before.

Just a memo to state that if anyone has thoughts of playing around with a remote phosphor Arrow Electronics has some of the Chromalit products in their stock.

For the month of September they have free shipping with no minimum special going on. That’s limited to the USA for the no minimum part. International has a US$50 minimum to qualify for free shipping.

Phosphors link;

Hmm, they also had the Ledil Cute-3 optic for awhile. I’ve been wanting to do something with an umbrella and this would be perfect, thanks.

Mug’O’Light, Mk. II

Can’t leave well enough alone…. :wink:

I had glued up an extra block way back there at the beginning. This one has the same walnut and padauk but has red oak in place of the maple. This afternoon I couldn’t resist drilling some holes I had marked out a few days ago. I may not have sufficient time to complete Mk. II by October 31. If I do I’ll nominate only one of these to be my official entry. I hope that is okay with the letter and the spirit of the official rules that permit only one entry per person. Anyhow here is the start….

The larger hole is space to be used for two TP4056 charger boards along with a heat sink that will cool to the outside of the mug. That is the biggest plan addition / change. I have some NCR18650, 3400 mAh cells I plan on using. That will give 85% of the capacity of the 4 Samsung 30Q’s I used in the original. That will still be plenty of run time and I don’t need the high drain of the 30Q’s in either of these. I’m also planning on cutting out another 7135 and using two. From what I have seen with Mk. I this should be quite adequate for the designated purpose.

I have a mini voltmeter thanks to Lazy-R-us, which I am going to try to add the Mk.I version as a modification to the original. It would be nice to know the SOC of the cells.

evolution….

I like the idea with the charger boards & voltage meter.

Good luck with MkII.