Re:“We're Shutting Down Our 3G Network”
by mschuster91 on Sunday July 18, 2021 @05:05PM
(#27876660)
- Car stuff has to be certified in order to be road legal (in Europe, ECE marked)
- Car stuff has to deal with a way wider temperature range than normal consumer stuff (-40 to +125 °C). That is the thing that makes silicon so expensive.
- Car stuff has to deal with vibrations and mechanical stress, meaning more expensive PCBs, less options for solder (remember the infamous NVIDIA solder issue of ~2010?) and connectors
- Car voltage regulation is a hot mess, at least for ICE vehicles - IIRC during engine start, voltages can drop to something like 6-ish volts and after that (or during battery disconnects/other load dumps) into 120-ish volts, and the voltage has an awful lot of ripple because usual generators are AC that's driven through a diode rectifier, with the battery acting as stabilizer.
- Most stuff in cars requires hours of work to replace it - Tesla were to my knowledge the first ones who did software updates outside of shop visits at all.
- Car stuff has to deal with a way wider temperature range than normal consumer stuff (-40 to +125 °C). That is the thing that makes silicon so expensive.
- Car stuff has to deal with vibrations and mechanical stress, meaning more expensive PCBs, less options for solder (remember the infamous NVIDIA solder issue of ~2010?) and connectors
- Car voltage regulation is a hot mess, at least for ICE vehicles - IIRC during engine start, voltages can drop to something like 6-ish volts and after that (or during battery disconnects/other load dumps) into 120-ish volts, and the voltage has an awful lot of ripple because usual generators are AC that's driven through a diode rectifier, with the battery acting as stabilizer.
- Most stuff in cars requires hours of work to replace it - Tesla were to my knowledge the first ones who did software updates outside of shop visits at all.