Recent content by vari

I had read some previous info catering to similar opinions as you raised, but after studying the product descriptions i thought the game has changed: 100W 808nm diode: "very high power laser diode stack with collimated beam spot" This sounds to me like what you need for cutting. A collimated...

You are running it at half the nominal power. You can have it on for as long as you like. Usually you don't have to drop it even that much.

I noticed how low the price of very high powered IR laser diodes have fallen, so i decided i should try and build a handheld laser cutter. Finally it seems with my budget to be possible to ditch old mechanical tooling and move to an age of energy. OD6+ quality protective goggles and clothing to...

Would this 4W/4A driver be good for this diode, it is under 10 euros at ebay? New 4W Blue Laser Driver NDB7A75 Blue Laser Diode Driver | eBay

Now i have finished the project. The full description and set of build pics can be found at my blog at LED Lighting Project 150-900W | Varikonniemi.

If you have not been following my blog, then here is a quick update on the current status of my LED lighting project. I finished the first 150W module (running at 124W) and made some comparison shots with a 110W high-powered fluorescent light. The pictures are taken at manual setting with a...

Now the AC side and DC output of the lighting driver is completed and mounted to the casing. The biggest changes so far have been switching over to a radial fan for cooling, dropping the bigger capacitor and replacing the series resistor with a coil, which increased the output voltage somewhat...

Today i connected the components, and with a test load of 140W the DC voltage was 108V. I also connected an inductor to further smoothen the current peaks. I may even replace the series resistor with the inductor to get rid of the voltage to load dependency. So for now everything is looking...

Today i decided to mount active cooling to the LED heatsink. I decided to use an old Antec 3-speed 12V computer fan. It should keep the LEDs considerably cooler.

Thanks for your input, i am well aware of these issues. 1. The design was draft up around the standard high-powered LEDs with a forward voltage of 32-34V. This would put the rectified DC voltage + LM350k voltage drop pretty much on the spot directly with 3xnormal LEDs. Very few watts would be...

I have not made the precise calculations yet, but it should end up in the ~100V range (86V*1.4=120V). The series resistor is one of the components used to drop the voltage somewhat. The LEDs were chosen kinda random. This project has gone through so many redesigns that these are the components...

Here is a little DIY project i almost completed today. It is a general LED lighting driver that supports 150 to 1000 watts wort of LED power. The design is extremely simple, modular and made mostly from parts rescued from going to the garbage dump. Only a few steps are necessary to get this...

Here are the scematics for now.

Hello rhd! I mentioned it in my blog, i won the auction at ebay for four boost converters for the price of one. It is not a driver, so there is no current regulation. I don't know if step-up models ususally have current regulation, step-down ones usually have. The listing is not there anymore...

One thing i must mention here at this forum, since there are probably experts who would point it out if not. I screwed up the fan controlling bad time. The idea of the boost converter was to allow bigger LEDs and to make the flashlight input independent. Now this is not the case since the fans...