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batteries are likely suspects - for lasers that take 2 x AA or 2 x AAA, I'm substituting 1 x Lithium rechargeable, with a dummy in the 2nd battery position. Note that this may overpower a unit with poor current regulation! Also, many cheap greenies have cheap switches that are real p.o.s...

"ouch!" ? jeeze, Eku, do you know that hurts to look at?

Update: I had ordered a "$10 grab bag".... and last night I checked the contents with a variable current-reg supply and my laser power meter (LPF DIY model :-) This was a bag of diodes with no guarantee of any usable - but of 30 x 9mm LD's in the bag, 20 were functional - and most of them put...

Hey, Kenom... just sent you an email! :poke: DanQ

fyi, I never got a message either acknowledging my payment or of shipping... but it did happen. Have you emailed him directly? I'll pm you the addr... DanQ

I sent payment to Chris on 5/27; received my goods (and they are very good!) on 6/3 -- that's less than a week to my door, pretty good - and the deal was unbeatable, highly recommended. Sorry to hear he's not going to be here anymore but I'll definitely keep my eye on his ebid/ebay sites! :) DanQ

geeze, have you no patience? 4 days ago means... Saturday maybe? Ah, yes, you posted about that Saturday. He ships twice a week, I believe somewhere he said Wednesday and Saturday. So, if he did shipping Saturday morningand you paid Saturday afternoon, yours won't ship until Wednesday - that's...

about 8 bucks iirc... :) DanQ

No secret; several sources: GALLIUM metal 5.6 g / ~$18 (eBay) - that's incl the shipping from GB 10 GRAMS INDIUM METAL SHOT / $17.50 (eBay) - free shipping Bismuth chunk 1lb $14 @Rotometals - some shipping charges there unless you can put together a $100 order - that would be about 7lbs -...

That has melting point 117 degF, right? that one is good for tricks... but it has quite a bit of lead, and cadmium, so take ote of that and don't play food tricks (like making a spoon of it for someone's hot coffee) :evil: DanQ

I just bought 1 lb Bismuth for $14 at Rotometals DanQ

is that the little ball at the top of the Pope's magic wand? :angel::evil:

agreed! it's unique and good stuff! eh? I read that's one of their uses... they coat the container with an oxide (indium -or gallium?) then it doesn't stick. Last night I succumbed to midnight shopper's disease... ordered indium, gallium, bismuth and tin :rolleyes: :) DanQ

:oops: oops... timing problem, was not intending that as a correction to your post! sorry for the poor juxtaposition... :o DanQ

there are a couple of low melting point metals that are non-toxic; even some alloys that melt in your hand. Check out United Nuclear (they are a bit pricierr for some things than other sources; but have a great selection) (neat stuff: Sodium Polyacrylate) indalloy, Wood's Metal, maybe others I...

I just made an order from Newark, and some were like $.007 each... and on eBay you can get nice assortments for not too much. But yours are all sorted and bagged individually, and small quantity;which makes it valuable beyond that .007. :yh: DanQ

I said I'm not going to debate more, but this post is a pointer to more information. But first a thought-question: many of our smaller-power lasers won't blind someone who is being careful... do we broadcast that it's safe to not wear eye protection?? One interesting thing I found: you can...

uhh.. I was responding to people who wanted me to believe there's no problem, I wasn't upset about it - just giving the fact as I see it. inherently safe? you either have a poor understanding of the meaning of that term, or you don't have a realistic understanding of Hg toxicity.

Well, the key to your success is that 10-Amp range and its low impedance. A higher-impedance multimeter or range would exhibit the problems. The reason that would be bad is, the errors induced would make the builder think the current is lower than it would be with the LD. So I agree that your...

uh huh. and have you heard the expression "mad as a hatter"? of course, I see you have... but it doesn't take every-day exposure, and you don't need to be completely coo-coo to have been affected. Your statement implies those things, and that's unnecessarily trivializing the danger. Yes...