The big automotive semiconductor problem

Post by dclowd9901 » Thu, Mar 31, 2022, 4:56 PM UTC

JKCalhoun wrote: post #25

> Automakers found that mechanical, hydraulic or pneumatic controls failed to achieve enough accuracy and consistency over each vehicle's usage life to meet these emissions tests. This was especially the case as the car aged. Decades ago, I owned an old Alfa Romeo that incorporated a complicated cam system to control the oxygen ratio to the fuel injection system. More complex than your typical 1-dimensional function…

Post by pySSK » Thu, Mar 31, 2022, 5:28 PM UTC

frosted-flakes wrote: post #26

chmod600 wrote: post #12

What devices are left that are fairly normal (that normal people might interact with in a given week), mechanical or electromechanical, have at least modest complexity, and have no microchips? Locks? Guns? What else? EDIT: perhaps an extra requirement that it's fairly durable, i.e. easily lasts ten years of normal use. EDIT2: maybe it should also fit the requirement that it's a current model in production and that yo…

Push lawnmowers, dirtbikes, or chainsaws typically do not have microchips, and they are all quite complex. Also, old elevators often had purely relay logic, and I've heard that it is often more cost-effective to repair old elevators than to replace them outright, so if you live in a really old building the elevator might still be click-clacking away. Then there are washing machines and dryers. Most new models are stu…

Post by sandworm101 » Thu, Mar 31, 2022, 5:31 PM UTC

ptsneves wrote: post #52

sandworm101 wrote: post #41

Earlier quoted context omitted.

>> SoC is not certified for -20/+80 degrees Celsius That is basically the operating range of the average graphics card these days. Not many people go sub-ambient with their cooling but no graphics card would complain if they did. The actual silicon is perfectly fine with such temperatures. The only real issue is the external cooling rig, a classic engineering problem that any car company shouldn't have a problem solv…

In low temperatures you start having issues with moisture saturating the air. Things get wet out of nowhere. There are also electrolytic capacitors which are water based so these need to be ruled out as well. Given air has at any given time a lot of water and water goes through a phase change at sub zero i find the comparison quite invalid.

Post by frosted-flakes » Thu, Mar 31, 2022, 5:42 PM UTC

chmod600 wrote: post #43

frosted-flakes wrote: post #30

Earlier quoted context omitted.

AKA low-efficiency water heaters.

Can you explain? Are you talking about inline water heaters as the efficient ones? I have only seen the tank style in the U.S. So it seems to fit, though I guess you are implying those will get replaced by something better.

Post by [deleted] » Thu, Mar 31, 2022, 5:51 PM UTC

sidpatil wrote: post #40

frosted-flakes wrote: post #26

Earlier quoted context omitted.

Push lawnmowers, dirtbikes, or chainsaws typically do not have microchips, and they are all quite complex. Also, old elevators often had purely relay logic, and I've heard that it is often more cost-effective to repair old elevators than to replace them outright, so if you live in a really old building the elevator might still be click-clacking away. Then there are washing machines and dryers. Most new models are stu…

> Push lawnmowers, dirtbikes, or chainsaws typically do not have microchips, and they are all quite complex. Is this still the case for the newer battery electric variants of these tools? The battery itself will have microchips for the BMS, and if those tools are using BLDC motors, those motors will contain a controller likely implemented with microchips.