Recent content by agent420

I wonder if the emi from the pwm could cause some kind of data interference... seems like ram would be an area I would want to be as electrically noise free as possible.

I respectfully disagree. Old Kenwoods, Sansui and Marantz are high quality products that were built to high standards. My old 60 wpc Kenwood KA 7100 still sounds better to my ears than the majority of todays consumer crap. Personally, I don't think many kids today actually have a clue what...

Good god those things look old :) Is that a '79 date code?

I'm wondering what kind of light this is... And why is that most people like to post ambiguous questions? :) Things are so much easier when we know exactly what is trying to be done. I mean, I'm guessing this isn't an ordinary pc mod light, or it would already have a connector on it. Or...

Is that an XT? One thing about the older gear (and I don't consider anything from the Pentium era to be 'old')... I bet it still works. I think much of today's products have half that reliability.

Make sure you get the correct resistors - there are special types for high voltage applications, which may be what you need... I'm sure you have seen this thread. Plain old 1/4 watt carbon resistors just won't cut it if these are used where I think they are, they'll just fry. Be very...

Agent's Mother Of All Supply Links. I've ordered from many of those links at one time or another without issue. I tend to purchase from Digikey if I can't find something cheaper at a surplus place like ALL or BG. I don't know what you mean by 'large' resistor (100 megohms? 100 watts?)...

I guess that depends on perspective and experience... It seems to me that any of these cubes really are just multiple 'planes' of 2D led matrices, where each matrix is driven by addressed high-side / low-side methods. So the driving section is relatively straightforward, albeit laborious to...

A bit of Googling will reveal many sites on LED cubes. I actually purchased leds to build a 10 x 10 x 10 cube, but haven't had the time to sit down and put it all together... I don't think they are complicated so much as they are just time-consuming to assemble the led matrix.

The Arduino is a good suggestion, but it bears mentioning that as a microcontroller platform it is a bit different solution to the problem... Certainly it could be used to perform the task, but you have to create a firmware program for the hardware in addition to any pc software you want to...

I would deem an LED Cube a required accessory for that tabletop ;)

While I found some USB Servo controllers with Linux drivers, they appear less common and more expensive than the PC variety. Perhaps an alternative would be to use std RS232 serial rather than usb, but you would still need to locate a control program or create one yourself.

Unless I am missing something, the only difference here would be filtering of the pwm output to create the (potentially current amplified) analog voltage?

With all due respect, that doesn't mean the voltage follower method suggested above wouldn't work - it's just not going to be efficient. But I'd suggest that is more a compromise towards the technical ability of the OP than the best solution possible. Also, am I to infer that you work for or...

If I understand correctly, he is attempting to use the mobo controlled fan speed output to operate more devices than the 1 originally intended smal fan, and needs a buffer (amp) to provide the additional current. This is unrelated to the mobo fan speed monitoring input signal that has been...