The 6th Annual BLF / Old Lumens - Handmade - MtnDon's Entry (fini)

I’m running an operating temperature test this AM. I ran the light on Hi (1.4 amps to the Nichia 219C emitter. The copper pill the l=mcpcb is fixed to settled in at 102F (39 C) with the external copper plates at 85 F (29 C) in a room with an ambient temperature of 70 F (21 C). I also had the charger plugged with the light turned on; the copper fin attached to the charger never warmed to more than a degree or two above room ambient. I removed the bottom cover after the 60-minute test run and the battery was the same temperature as the wood lantern bottom, just a degree above room temperature.

Next will be a runtime test. Later tonight maybe.

Changed my avatar; :slight_smile: does that confuse anyone???

Its about time the Tardis had a makeover. :slight_smile:

good one

Not me. I often “recognize” well-known members by their avatar, rather than by name. So, when reading a thread, I see the avatar at each post to know who’s talking. I saw your new avatar and thought “hmm… somebody’s already made their avatar look like MtnDon’s lantern”. Then I saw your name there and thought “Aha! Of course!” :sunglasses: :+1:

In other words, in my mind, your lantern already represents you better than the name does. So, it deserves to be your avatar. :crown:

I liked watching all the woodwork you have been doing, and you got a really nice result! That is a very goodlooking lamp :slight_smile:

Beautiful :o :blush:
Great work !!!

The lipo battery is rated at 3000 mAh.

I ran the lantern on the 50% which is theoretically 700 mA.

After slightly more than 4 hours the light output seemed somewhat dimmer. At 4 hours 15 minutes, the light had dimmed more and the driver went into its blinking, low voltage mode. The voltmeter read 2.91 volts.

It appears the battery is pretty much the advertised 3000 mAh capacity. That makes me happy.

During the recharge the copper strip heatsink was barely warm to the touch. I guess I could have used a 2 amp charger, but didn’t have one on hand and was not sure one would arrive from CN in time. The PO tracking shows a package should arrive next week, so it could be here in time to swap, but I don’t think I’ll do that. The 2 amp is slightly larger and the connection points are in different locations. I’ll save the 2 amp for a second one I may build.

Can you link the 2 amp charger you ordered. 1 amp are easy to find but can’t find a decent 2 amp. I’m in the process of building a lantern myself, but nothing compared to your skills.

Yes, it could be paralleled with the 1 amp charger board. Finding a place to mount the second board would be the challenge. A 2 amp would need a heat sink for certain. I have used one before. I thought I had a spare but could not find it. That’s why I ran into a time crunch to order a 2 amp. I could maybe mount it externally under the bottom cover piece. ??

MD, that may be a request for a hyperlink. Even if it wasn’t, it would hurt to give the link for us curious individuals. Thanks!

:person_facepalming: Total misinterpretation of the statement / question about “could I link”…… I’ll look that up and get back here and post it. Thanks for making that clear to me. Getting old or something….

This charger board

:+1: thanks

Sorry I wasn’t clear with my request. The hyperlink is perfect. Thank you.

Well, it is funny how the mind works. At least I think it is funny how mine works at times. :person_facepalming:

Beautiful Work! :sunglasses:

OK. It is completed. No changes or additions, but I dusted it off a bit and polished the external copper discs. Then I took a few more pictures.

Very nice sir :+1:

I think its been mentioned before but when does the group buy begin? I’d be up for a few. :slight_smile: