this post was submitted on 19 Mar 2025
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I bet the reason why he does not want the LiDAR in the car really cause it looks ugly aestheticly.
You don't necessarily need to implement lidar the way Waymo does it with the spinning sensor. IPad Pros have them. Could have at least put a few of these on the front without significantly affecting aesthetics.
There's a reason they do that, he actually covers that in the video. Lidar spins a single line many, many many times a second. Processing the differences in that line scan to scene makes the point cloud generation many times easier allowing the scan to be exponentially more dense.
The iPhone uses a diffraction grating to shoot static dots at your face and looks for the subtle movements of your face and phone to generate a 3D scan.
The diffraction method is tiny and good for static identification but bad for high-speed outdoors.
The spinny towers give it a better field of view. you could probably put shorter towers on each corner, or even build them into the body panels, but it's a delicate, expensive instrument and it's not what's currently holding back self driving anyway :)
Everyone and their dog uses radar for distance sensing for the adaptive cruise control. You take the same migh speed sensor and use it for wall detection. It's how the emergency stop functions work where it detects a car in front of you slamming on the brakes.
It's also very expensive.
Relative to the car, it's peanuts at large quantities
Sorry but I don't get it. You can getva robot vacuum with lidar for $150. I understand automotive lidars need to have more reliability, range etc. but I don't understand how it's not even an option for $30k car.
The is Elon we're talking about. Why pay a few hundred bucks to improve safety when it's cheaper and easier to fight the lawsuits when people die?
You're car's not driving indoors at 1mph with the maximum damage being tapping but not marring the wall or vehicle.
You need high speed, bright lasers, and immense computation to handle outdoor, fast, dangerous work
he does not want to pay $1 for rain sensors and $2 for ultrasonic parking sensors, any price for lidar must be unacceptable
They were much more expensive years ago when the decisions were made to not use it. Costs have come down a lot. And cars can have more than 1 if you're going to use it. That also means more compute needed so a stronger computer and more power draw meaning less milage, which means bigger battery for same mileage. It all adds up.
Edit: might even impact aerodynamics, which again means more battery, which is more expensive.
The power draw to process the LIDAR data is negligible compared to the energy used to move the car. 250-300 Watt hours per mile is what it takes to move an electric sedan on average. You might lose a mile of range over an hour of driving, and that's if you add the LIDAR system without reducing the optical processing load.
LIDAR sensor housing can be made aerodynamic.
While it's true that LIDAR was more expensive when they started work on self-driving, it doesn't make sense for them to continue down this path now. It's all sunk cost fallacy and pride at this point.
A mile per hour is probably about right, but that's probably per lidar. Waymo has 4 for example, so on a 300mile vehicle that could be 17 miles at 70mph.
Even if you can make it aerodynamic it's still not going to be as aerodynamic as it not being there.
Sunk cost fallacy make sense, but I'd say it's also the fear of the massive lawsuit/upgrade cost if wrong due to his statements.
I tried to look up how much power these self driving systems are pulling, but it looks like that will require a deeper dive. The only results I got from a quick search were from 2017-2018, and the systems were pulling around 2 kW. I'm sure that's come down in the 7-8 years since, but I don't know how much.
I think you're right on the lawsuit/upgrade cost. They are on the hook to supply Full Self Driving to all the buyers who bought the option. It's clear they're not going to be able to provide it. It looks like there are several class-action lawsuits currently underway.
I think the older Tesla system (HW3) was around 300w, but I think the newer system is more now as they beefed up the compute, but I haven't seen a number on that. The old system is pretty much maxed out though with no room to grow other then making things more efficient vs just more raw power usage.
A lot of the older hardware back then wasn't purpose built for driving and was more repurposed general graphical compute, so it was less efficient hence the 2Kw you were seeing. Tesla built ASICs for the driving computer to bring costs and power usage down.
With the newer purpose built Nvidia stuff I'm sure that has brought the power draw down a lot though, likely relatively close (better or worse I don't know) than Tesla's watt per performance.
edit: clarity
IIRC robot vacuums usually use a single Time of Flight (ToF) sensor that rotates, giving the robot a 2d scan of it's surroundings. This is sufficient for a vacuum which only needs to operate on a flat surface, but self driving vehicles need a better understanding of their surroundings than just a thin slice.
That's why cars might use over 30 distinct ToF sensors, each at a different vertical angle, that are then all placed in the rotating module, giving the system a full 3d scan of it's surroundings. I would assume those modules are much more expensive, though still insignificant compared to the cost of a car sold on the idea of self driving.
It costs too much. It's also why you have to worry about panels falling off the swastitruck if you park next to them. They also apparently lack any sort of rollover frame.
He doesn't want to pay for anything, including NHTSB crash tests.
It's literally what Drumpf would have created if he owned a car company. Cut all costs, disregard all regulations, and make the public the alpha testers.
The panels are glued on. The glue fails when the temperature changes.
I can't believe that this car is legal to drive in public.
Right? It's also got a cast aluminum frame that breaks if you load the trailer hitch with around 10,000 lbs of downward force. Which means that the back of your Cybertruck could just straight up break off if you've frontloaded your trailer and hit a pothole wrong.
Only in America
Yeah, that’s not very typical, I’d like to make that point.
The ~~front~~ back fell off.
it did cost too much at the time, but currently he doesnt want to do it because he would have to admit hes wrong.
The guy bankrupted a casino, not by playing against it and being super lucky, but by owning it. Virtually everything he has ever touched in business has turned to shit. How do you ever in the living fuck screwup stakes at Costco? My cousin with my be good eye and a working elbow could do it.
And now its the country's second try. This time unhinged, with all the training wheels off. The guy is stepping on the pedal while stripping the car for parts and giving away the fuel. The guy doesn't even drive, he just fired the chauffeur and is dismantling the car from the inside with a shot gun...full steam ahead on to a nice brick wall and an infinity cliff ready to take us all with him. And Canada and Mexico and Gina. Three and three quarters of a year more of daily atrocities and law breakage. At least Hitler boy brought back the astronauts.
I was mostly lambasting fElon, not Drumpf. You're correct on Drumpf though. I was discussing the swastitruck, after all. Drumpf showed that he's scared to drive any of the swasticars when he pretended to know how to sell anything, much less an EV.
Oh, and Drumpf bankrupted 3-4 casinos in the late '80s to early '90s in Atlantic City, NJ. Literally the golden age of AC casinos.
It's all money laundering for russian mob/fsb. Still pretty hard to bankrupt a business that basically prints $$$ though. Epic levels of incompetence!
Not enough. Go on to do it four more times.
basically like oceangates stockton.
I mean, I haven't ever heard of his father referring to Stockton as "retarded," according to his teachers and professors, the way that I absolutely have heard about both Drumpf and fElon.
Other than that, yeah. Bullshit techbro shit, and landleech shit.
stockton california is named after family.
But without the happy ending.