alrighty thanks!

hi, are you saying i should play the spider file and play a frame from laser boy at the same time to see if i can get 5 volts for the offset pots?

hey i was reading your thread and i was pondering if this dac could be ttl because i have a FireMyLaser driver and a whole rgv set up. and i was planning on making scanner but i had to know?

The DAC will handle analog and TTL just fine.

but how if this dac is based on a sond card wouldnt just be all analog

Any system that can handle analog can also handle TTL by default. Analog systems can supply anywhere between 0 and 5V, which would by default include TTL. TTL is just a 0-5V square wave.

What you want to do is set your lasershow software to TTL, if such a thing is possible.

^It's a standard feature in every program that supports the soundcard DAC..

Good, problem solved.

I had the same problem, for some reason windows media player forgot how to play wav files. Download the AC3 decoder for free and it will fix your problem

This might need to be added to the tutorial as I wasted an hour or so trying to figure out why I couldn't play it

^Thanks for pointing out a solution. I have added it to the tutorial.

Hello Folks!

I have a 6ch CMedia ready and want to build an quick & dirty correction board.

Could you help me?

I drawed a plan with the patient help of Nicolas (weartronics) and his great Differential Amp Design. As i cant get the ±9V DC Converter here, only 5 to ±12V, which wont get enought power from usb; i thought of taking one of the 12V wallwarts i have colleting dust, and creating ±5V from it by splitting regulated 10V. the dropout of the IC is 2V so it fits, or not?

Also, i have a only TTL modulated Laser (Pf-114) so i dont need real linear amplifying by now, it should just be able to blank the Laser with Spaghetti and HE. Maybe someone could give me a solution that uses only Transistors for the RGB chan or even raw unamped Soundcard Output.
Here are the input specs: Bild: 300mw_rgb_animation_lao40c.jpg - abload.de


Sorry im a total noob in Electronics. i can solder even SMD without problems but have no clue how the stuff works and how to design a circuit from scratch and what parts i need etc...

Thanks
TC

Weartronics is the man when it comes to this stuff..

That circuit is sweet because it's differential.. but I understand not having the skills to build it. As an alternative, 300EVIL sells bare PCBs for his correction amp. This is far cheaper than an assembled unit, and then all you'd need to do is get the parts and build it. You may already have quite a few of them around..

Also, a 5V to +-12V converter should be able to run very easily off of USB. I'm using one on my amp right now. Using the higher voltage DC-DC converter gives you a larger scan angle, so it's beneficial.