One would think that the person driving the car would have stepped in to control the vehicle, but alas. Apparently the Tesla reacted to that by speeding up, but failed to notice the stationary fire truck.
Crash analysis reveals that the Tesla was on Autopilot and following another vehicle the driver of the lead vehicle noticed the obstruction and changed lanes. Such a lesson appears not to have been in the Tesla Autopilot’s driver education curriculum, though – a Tesla Model S managed to ram into the rear of a fire truck parked at the scene of an accident on a southern California freeway. It’s probably one of the first lessons learned by new drivers: if you see a big, red fire truck parked by the side of the road, don’t run into it. Many of the changes are to improve compatibility with other Spice programs, notably HSpice.Ĭontinue reading “What Rhymes With Spice And Simulates Huge Circuits?” → Posted in Tool Hacks Tagged circuit simulation, sandia, SPICE, xyce Xyce has been around for a bit, but version 7.0 just arrived in April.
The code is open source, but oddly you do have to register to download it. On Linux, it will do what they call “small-scale parallelism.” In addition, it can deal with simulations of things as diverse as neural networks and power grids. As you’d expect from a giant government lab it is able to support large scale parallel computing, but will also work on common desktop systems.
If you want to simulate circuits you may very well start chewing up significant CPU time, so you might consider Xyce, an open source high-performance analog circuit simulator from Sandia National Labs.
We always wonder how many of them get any actual workout other than decoding video. Most of us have computers on our desk that would have been considered supercomputers not long ago. Posted in Musical Hacks Tagged circuit simulation, guitar effects, guitar pedals, LTSpice, simulation, spice simulation Anybody who wants to try their hand at creating simulations can grab a copy of LTSpice, or check out a package called LiveSpice, which lets you simulate circuits in realtime and use them to process live audio - pretty useful for prototyping guitar effects. Beyond that, it’s an excellent survey of analog design that is well-worth the read for anybody interested in audio, electronics, or audio electronics.įor those interested in taking the physical route rather than the simulated one, we’ve taken a look at pedal design before. On the surface, it’s an interesting tour of the inner workings of your favorite effects pedals. His write-up clearly explains, and often demonstrates, what’s going on inside the box. Able to find most of the schematics he needs online, breaks down the function of each part of the circuit and builds a simulation of the entire system. To undergo such an investigation, has been simulating guitar effects pedals in LTSpice. Of course, it’s fun to look at signals this way as well, especially when you can correlate shifts in sound quality to changes in the waveform and, ideally, the circuit that produces it. After all, it’s much easier to ask to guitarist for a crisper sound than to ask them to sharpen the edges of the waveform, while amplifying the high-frequency components and attenuating the low-frequency components. These aren’t very technical terms, but they get the job done. A sound can be fat, dark, crunchy, punchy - the list goes on. Musicians have a fantastic language to describe signals.