• 0 Posts
  • 24 Comments
Joined 1 year ago
cake
Cake day: July 5th, 2023

help-circle

  • It’s mostly kernel upgrades that can be a problem. If you stick to the repo, you will generally be fine. If you need a specific version of CUDA, or a feature that’s only in the newest driver release, you’ll have to build the kernel module yourself. It’s not a huge deal after you learn how it works but you’re almost guaranteed to break it at some point and then you’re on the command line. If that scares you, go AMD.





  • It depends where you measure. If you measure across the inductor, it absolutely goes negative.

    The frequency is generally fixed, the duty cycle will vary.

    A variable speed drive can be fed with DC. Is the output AC or DC? I know you need a three phase AC motor to wire up to it.

    Is audio DC? It doesn’t have a fixed frequency. Amplifiers pulse DC and then remove or ‘block’ the DC offset so speakers see AC.

    It seems like people in this thread have a very strict definition of AC being a 60Hz sine wave, and everything else must be DC.


  • Is a square wave not AC? Current is flowing in and out of an inductor 100k times a second.

    Could that 100khz square wave excite a transformer and produce usable current on the secondary? Absolutely it could, and that’s how a bigger SMPS works.

    If you’re looking for a “pure DC to pure DC” converter, that’s called a linear regulator and it’s wildly inefficient. They work by varying the conductance of a transistor but are useful for low currents. The extra voltage is converted to heat.