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yes it is possible. but the chip i used is only available in a 3x3mm package :o you could use another chip, but i couldn't find any others with such a low input voltage. pretty much all chips now days come in smd, very few new designs are being produced in through hole for the hobbyist >:( i am...

lol. I should have read the first post more carefully. you want to BUY one :P sorry for teasing you with a diy solution ;) maybe over these holidays i will order in some parts and make some to sell. anyone interested?

lol ok it wasn't even lasing in that picture... somehow the threshold changed from 20mA to 27mA :-? anyway. got it running at 37.8mA using 22ohm and 33ohm resistors in parallel (13.2ohm total) dvd and cd drives are a great source of smd resistors and stuff :D

well. i put it in a 'case' and jammed a blueray on the end of it the 'case' is a whiteboard marker. the only thing i could fit a AA in its running at 21mA. i am going to boost it up to 30 when i can find the right resistor

oh yeah and my driver board does actually fit in a aixiz module

i made this tonight. a AA ni-mh powered blueray. i know the body is a bit ugly, its a white board marker. i am grossly under powering it at the moment. its running at 23ma... the driver its self is capable of above 200mA running off a single AA...

Re: TINY Blu-Ray switching power supply on eBay no why didn't you use the tps61200 and make it proper constant current, using a sense resistor for the feedback? its a nice little chip. makes so much possible

the idea of the amc thing is that you buy a LED driver, take one of the chips off the board and use it to drive a laser at 340mA i don't think it would work with 2AA's though. you will need at least 3.3V the only way you are going to drive a burner off 2AA's is with a switching power supply, a...

the circuit is basically the same as my 2xAA blueray driver just a different chip. its pretty straight forward your supposed to keep ammonium persulphate solution at 75C for etching. higher makes it go faster lower makes it go slower i bought the ammonium persulphate from dick smiths...

thats why i went for ammonium persulphate. its pretty much safe. no fumes not too bad to get on your skin. and you just buy the powder and mix it with water then pour it down the drain when your done etching. also it doesn't require much powder per board and it etches within 5min i tried photo...

i got it from jaycar (australia). pretty expensive stuff but 60g of it will last a long time. I put it all together. testing with a 2.2V 147mA IR laser diode using a 1.2V AA battery it drew 420mA. thats 61% efficiency this is expected with such a low voltage diode. 19% is lost in the sense...

so did you design that layout? it would probably be a good idea to have wide, short tracks. this circuit will be operating at 1.6Mhz and at high currents. looking at your design, it could cause to instability having such thin tracks. it sorta looks more like a linear regulator design than a...

I use a mini 'toaster' oven and smd solder paste just put it in till the solder all melts.

btw don't use jpeg for this sorta stuff. its really lossy and has artifacts. and png compresses solid lines better and why did you post the layout with 121 boards on it? one would do for all intents and purposes i mean seriously.. 20MB jpg!!! :-?

wow crop or resize or something. the first image is too low res to see whats going on, but there are lots of low res boards :P and the second image is so huge LPF doesn't load it. 16490x21642 is WAY to big to be posting how did you even upload that? is that double sided?

thanks for that toked i etched some boards today. i used the 'direct toner transfer' method. basically you print (using a laser printer) on to the non stick backing paper from stickers. and iron that to the boards. the toner sticks to the board and you can remove the paper. then you put it in...

if it did exist, cheap laser pointers would blow the first time you use them. batteries are not capacitors, they only make the voltage possible in the chemical reaction they use, a little more or less depending on the concentrations and stuff... maybe when someone tried to measure the 'effect'...

well here is a B+W printable version 600dpi (printing at 12% gets the exact right size on my 600dpi laserjet) size should be 8.1x11.7mm and if you are doing the toner transfer method, invert the image before printing :P i have ended up with quite a few useless boards because of not checking this

yup I is in amps to make LD- connected to Bt- it would require at least another chip and maybe some resistors. basically it would be a clone of the lavadrive.

i am pretty sure drlava's driver doesn't use the pd pin. it is just constant current like all the other drivers out there i made up a small board for this chip. u1= TI TPS61201 edit: TPS61200. (the 01 version is not adjustable) I1= coilcraft LPS3015-222MLB, C1-3= 10uH ceramic, C4= low value...