[Diy_efi] 12V vs 42V

Wed Jan 15 20:12:28 GMT 2003

bcroe at juno.com wrote:
> I believe the filaments for bulbs get too fragile for a car, 
> when made very long and skinny for higher voltages.  Just 
> bump a 120 volt bulb when powered and its open circuit.  
> 

I guess they could just use HID for headlights and LEDs for the rest,

> Certainly the safety issue puts a lid on voltage, just as it 
> has in the phone business for over a century.

Another reason to stay at around 40 volts is that AFAIK it's
about the highest you can go if you want build it in "standard"
chip technology

-Lasse

> 
> Bruce Roe
> 
> 13 Jan 2003 Bernd Felsche <bernie at innovative.iinet.net.au> writes:
> 
>>On Mon, Jan 13, 2003 at 01:17:32PM +0000, Mike wrote:
> 
> 
>>>Things get more interesting with the higher voltage,
>>
>>The reason for the "about 40V" choice is that the current 
>>crop of automotive electricians won't require re-licencing. 
>>At least not in the USA and EU. They're allowed to fry 
>>ECU's and blow airbags rated to about 40V.
> 
> 
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