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I am looking for a simple, small battery level monitor for custom hosts. Similar to this: 3.5-7V RX Battery Voltage Level LED Indicator | eBay This one is for 6v racing packs, I think. $5 is a good target for something like this. I may get this one, but it's a tad large and for a single...

I haven't blown a diode... yet. I suppose a $50 diode blown precisely because of a low-cost supply would make a higher-cost supply a no-brainer.

Thanks!

I just saw this on-sale: 0-30V, 0-3A Mini Bench Supply-MPJA, Inc. 0-30v and 3A. I bought the $60 vertical version: 0-30V, 0-3A Variable Benchtop Power Supply-MPJA, Inc. I used it for the first time last night. Great little unit! Love being able to directly drive and test diodes this way...

Hi folks. Without access to a metal lathe, I've been looking for some inexpensive ways to provide a heatsink for an Aixiz module. Spent quite some time at Lowe's yesterday and have much to report, but for now I wanted to share this interesting $3 piece I found in the plumbing section: Shop...

Of course there is "Fire! Fire!" from Beavis. How about that reference? :-) Beavis and Butthead: FIRE FIRE FIRE!

Picked up a couple of 32650 LiPo cells that are supposed to be protected 32600 (D-cell size). Well, these are a full 70mm, 10mm more than a D-cell. So, use in hosts requires a mod. Fine, but how to charge them without buying a special charger? Project cost: about $3.50. Bought a 2 D-cell...

Hi. Happened upon this piece of hardware @ Lowe's this evening. It's a brass tube, just shy of 5mm and nicely surrounds the pins on a standard TO18 laser diode. It allows you to put even pressure on the diode while protecting the pins. Best yet, you get enough tube to cut it down into...

Just a suggestion to the overseas marketers of LiPo batteries: having the word "fire" anywhere in the name of a LiPo product is NOT a good idea. :-)

One additional point: 6 1.2v NiMH cells is 7.2v, which is a huge beefy supply very close to the 7.4v of 2 LiPos.

Hi folks. I was on a site looking at power supplies and noticed these huge MagLite-like hosts that are relatively cheap. There's a 6-D version! At almost 20" long, not terribly practical, but it will run forever and a massive heatsink in that head could accommodate several modules. Might be...

Hey thanks! That is perfect - especially for my budget!

Hi. I too am trying to fit an odd sized compartment. The best solution I've come up with thus far is 3 15xxx cells in a triangle. No holder. Will probably have to solder them in parallel and charge them with clips. In this host, these are 15270s, but I can go larger. With the cap closed...

OK - thanks. Until I get an LPM, I'll set it per manufacturer ratings. I was looking at the $69 J.Bauer meter, but it runs to 200mW. Led me to wonder if one could use filters to attenuate the beam to some predictable (and linear) rate. My guess is such optics would end up costing as much or...

Looking for a decent, yet inexpensive power supply with current and voltage settings independent. This one looks decent (0-30VDC and 0-3A)... Brand New Mini Bench DC Power Supply 0-30V, 0-3A! Great Supply! | eBay Price is right: $85 with shipping from US. Any better deals out there? The...

Here's the module. Compared to some of the cheapies I've seen, it strikes me as rather nice. About the 500mW diode - is it possible to drive these beyond their max ratings and achieve any benefit?

Hi all. I've posted a few times, so I thought it time to play by the rules and introduce myself. I am fairly experienced, have been around lasers for many years. First was a HeNe (dim!) tube I picked up at an Amateur Radio swap fest, probably in 1985. It was, I think, removed from a store...

Here is the driver I pulled. I haven't tested it to see whether it is it or the diode (or both) which are blown. Initially when it failed, it would get hot with no visible output. Then it just was cold.

Any recommendations on an inexpensive 1W class 808nm diode? I can't find anything in a TO18 package. Looks like the highest is a 500mW... 808nm 500mW Laser Diode / TO18 (5.6mm) 1 PCS | eBay This one is $19 and looks to have good specs... 500mW 808nm Infrared laser diode/TO-18( 300mW TO18...

Here is the 808nm diode pulled from the module. It's a nice module, so I'd love to rebuild it! I'll definitely post info about the process here. I will post some pics of the (possibly blown) driver. I will test it later. Need to build a dummy load first. This diode is canless (does it...