Search results

Hey guys, I wanna buy some protection for blu-ray/green and the unic company I know for sure that sells certified goggles is oemlasersystems. However, their shipping costs to spain are way too high because they can't send without tracking and they might also use some serious packaging as these...

Oh YESSS!! Maxim again saves our day! http://datasheets.maxim-ic.com/en/ds/MAX4173-MAX4173T.pdf Now the only problem is what would happen if the battery drops below 3V and the amplifier stops working.... because if it stops working and starts sending a "random" voltage to the feedback pin...

ehm ..... being sincere, also your 12 ohm resistor is in serie with the LD ..... :whistle: Anyway, i think it can be improved, using an amplifier, as you say, cause this way, you only need to regulate the gain (or the voltage you read, both the solutions are good, imho) ..... only, the op amp...

Well... 4.7ohm is still too much. And germanium transistors tend to be expensive and they don't last very long. With a proper current sensing amplifier you can use 0,1 ohm or less precission resistors. Those devices have fixed gain so, instead of using a pot to adjust the gain as we would do if...

No, first I thought that it could be unstable or that it wouldn't work with the resistor trick, but then I started making simulations and for my surprise, everything was working OK and stable. It's also fine in the real product, I did a 5 minutes run test through my test load and it was steady...

Fixed 5V Output---> that means unusable for our pourpose. But check this one: Linear Technology - LTC3454 - 1A Synchronous Buck-Boost High Current LED Driver LED driver IC's are actually better as they are designed as constant current drivers by themselfs, so better features are available...

I was just designing a PCB for the LT1930 and i'm almost done. I think i made a mistake last time I wanted to design a PCB for it, as this time i found no problems... strange... I'll probably make one LT1930 driver tomorrow as i have 2 of them. The advantage with LINEAR products is that they...

Yeah, that one is fine but... big and with some functions not required for this kind of drivers, that also difficult the design. If you want to make something that works exactly like my driver but capable of more current, check Linear Technology - Linear Home Page. For example, LT1930 is a good...

Hey guys sorry fr not having answered all this time... I was on holidays and all that stuff.... As I promised here's the schematic/PCB design/parts list for the driver described in this post. Parts list: FOR SINGLE LI-ION CELL WITH BUILT-IN BATTERY PROTECTOR: -1x MAX1723EZK+ ---> sample it...

OK guys, I would gladly send you one of thse drivers, but i'm out of stock. I had 5 of each IC to make these drivers, and used 2 of them in prototypes (who do work, but have a bad diode connection system that is a pain in the ass to solder), 2 of them for me, and the other got fried during a...

I got more PHR's today and I decided to harvest one today. It all started like with my two previous diodes, that were succesfully extracted and are still lasing, being victims of my new designs of drivers. But this time, some of the flexPCB fused together with the solder and I formed a blob of...

This is a VERY GOOD SELLER. We had a slow transaction because the first package he sent me was ¿lost? and I didn't receive it in 3 weeks. But he sent me another package and this time it has arrived very fast and everything is OK. This is a very reliable seller and i'm still thinking a way to...

Yeah, I know he might have built a lot of lasers but... soldering paste is not something commonly known to exist, and it is expensive, but it makes things easier for some delicate tasks... I always liked to give advice to teachers when they required (always with respect, and mostly to...

You shoud try soldering paste ("liquid" solder). It PWNS for precission works where you would want to hold the component being soldered, but you must hold the solder wire instead. And it's far better if you have a hot air gun with regulable temperature (or hot air soldering station). That way...

Nope, that still has to be developed. I just create vias with some wire or the legs of a component, soldering both sides.

I do them myself for my own projects. I can achieve very high resolutions, such as 10 mil traces and things like that with no professional equipment (a glass - PCB sandwich and inkjet transparent films immediately coated with talcum powder after printing). This is a small sample of my work...

Same can be done with 3 band pass filters, one for low, one for mid and olne for high sounds. Audio signal gets divided in those frequency ranges, and each filter drives a transistor that drives a second transistor that drives one ofthe 3 spyrograph motors. That way, you have patterns that fully...

Bump....

He is probably already blind, so no googles required.

LENSPEN is The superior Camera lens cleaning system for all fine optics, rifle scopes, camcorder and camera viewer screens, binoculars You can also buy them from ebay. Use that and no more, they are simply perfect. I own a mini pro for cameras, a cellclear for lasers and a vidimax for screens.