FireFly

Has anyone used one of these Lightwave 4000 flashlights? http://www.lightwave-4000.com/ It uses 10 LED's and they go for about $35 U.S. on eBay. Are they as good as they sound? Maybe it would be interesting to convert the head of a conventional bulb flashlight to one of these LED types. Can anyone tell me what additional circuitry would be required and a particular brand/model of LED that would work well? Hhhmmm. Maybe use red (for astronomy) and white LED's with a switch to choose the color. Thanks.

I have a transformer out of an old Sanyo receiver that I would like to use for tinkering rather than contribute to the landfill. I realize tranformers aren't rated by pounds/kg but it seems rather substantial (and useful?). It's in a molded metal "container" with some numbers on it that are 1/2 wiped off. 1. Without the part number and Sanyo's help (LOL!), I can't easily determine the volts/amps rating of this, can I? 2. Do these types of transformers tend to be better quality when used in sound systems? 3. Might this be useful for the "0-30 VDC STABILIZED POWER SUPPLY..." project or do these tranformers tend to have small amperage ratings? I know, I know! I can buy the proper transformer for $20-$30 but I like the learning. Thanks for any info.

I'm beginning to wonder if this is a little too much for my first project but I'm learning lots! On the Parts List, item: D1, D2, D3, D4 = 1N5402,3,4 diode 2A - RAX GI837U ...has me a little confused. This means the bridge would be four 1N5402's OR four 1N5403's, etc. and not one diode of each part number, right? What is "diode 2A - RAX GI837U"? Is it a diode (which I'm not able to find any info on)? I would like to make some small changes and play with it before I build it. By chance, has anyone tried to setup this schematic in Tina for Windows, Student Version? Any problems doing this? I'm having problems but suspect it's most likely user issues. ::) TIA!