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Joined 2 years ago
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Cake day: July 6th, 2023

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  • I got the head unit changed in my Subaru . In the Subaru, the systems that the Head Unit controls (entertainment system, backup cam, Sat NAV) are totally separate from critical systems. So everything the head unit controls can fail and the car will still work.

    And you’re right, there’s an interface/translation layer . In my case the guy used an iDataLink Maestro. It seems the only thing the iDataLink company does provide interfaces that allow head units to talk to car computers, so that the Head unit manufacturers don’t have to bother.

    I’m not sure such separation is common in EVs.




  • I’m guessing the cheaper ones don’t have sine-wave inverters (they use a dressed up square wave which can be produced by purely digital electronics) so quality of the output waveform is bad. The power supply of the laptop (or PC) ends up having to work harder to cut out the extraneous bits of the waveform (that is it’s job) but all that extra crap is just turned into heat. Laptop PSUs are small , so have less heat dissipation and likely aren’t built for this. The ideal use case for these cheap inverters are purely resistive loads (like heaters) but even some less sophisticated electronics would probably be fine. Computer however, are generally designed for clean power.

    If it’s a sine-wave inverters and the generator is working properly then idk why it would matter.