Any insight for Automotive Sensor Inputs/ Front-End Protection.
in [Design]
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From: Johnny5 on 29 Apr 2010 15:52 On Apr 29, 12:14 pm, "Joel Koltner" <zapwireDASHgro...(a)yahoo.com> wrote: > <m...(a)sushi.com> wrote in message > > news:5c942ab3-7abe-4045-a98c-28b1f15ce440(a)k41g2000yqb.googlegroups.com... > On Apr 26, 3:35 pm, Johnny5 <dirtylogicdesi...(a)gmail.com> wrote: > > > The automobile industry seriously needs to address providing DC to > > their customers. They need a better connector instead of the cig plug, > > and the DC should be conditioned. > > For that sort of thing the auto industry tends to follow rather than lead.... > there are a few cars out there (SUVs, I believe) that provide standard 120V AC > outlets, and I wouldn't be surprised if sooner or later you see some USB (5V) > connections (many 3rd-party stereos already have a USB port for playing back > music from memory sticks, for that matter)... but what would the conditioned > 12V standard connector be? > > The amateur radio guys like Anderson Powerpole connectors... Thanks again, You guys are great! I couldnt find any OPTO ssr's that seemed to be very tolerant. would r-tvs-r-MMBD 7000-opto-LED be overkill. say an smbj33ca for the tvs?
From: Grant on 29 Apr 2010 16:42 On Thu, 29 Apr 2010 10:14:35 -0700, "Joel Koltner" <zapwireDASHgroups(a)yahoo.com> wrote: ><miso(a)sushi.com> wrote in message >news:5c942ab3-7abe-4045-a98c-28b1f15ce440(a)k41g2000yqb.googlegroups.com... >On Apr 26, 3:35 pm, Johnny5 <dirtylogicdesi...(a)gmail.com> wrote: >> The automobile industry seriously needs to address providing DC to >> their customers. They need a better connector instead of the cig plug, >> and the DC should be conditioned. > >For that sort of thing the auto industry tends to follow rather than lead... >there are a few cars out there (SUVs, I believe) that provide standard 120V AC >outlets, and I wouldn't be surprised if sooner or later you see some USB (5V) >connections (many 3rd-party stereos already have a USB port for playing back >music from memory sticks, for that matter)... but what would the conditioned >12V standard connector be? > >The amateur radio guys like Anderson Powerpole connectors... > I like Anderson PP connectors too, but they're not standardised to a particular layout. I've seen red on left or right as 'standard' or convention. Red on left for 24V, red on right for 12V :) 'so many standards to choose from'... Grant. -- http://bugs.id.au/
From: Grant on 29 Apr 2010 16:48 On Thu, 29 Apr 2010 07:27:15 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon(a)On-My-Web-Site.com> wrote: >On Thu, 29 Apr 2010 07:30:11 +0100, John Devereux ><john(a)devereux.me.uk> wrote: > >>Joerg <invalid(a)invalid.invalid> writes: >> >[snip] >>> >>> Figure 1, for a dose of reality: >>> http://www.automotivedesignline.com/howto/205101011 >> >>Hi Jeorg, >> >>That LTC part will likely blow up before the simple resistor+opto >>solution. The Ford load dump pulse is only 60V peak with 150ms decay >>time constant. >[snip] > >Alternators have been improved over the years. In my day (mid '60's) >you could see _400V_! > >So, above 20V, my field driver devices turned off and went into BVCER >mode and rode out load dump. > >The control chip itself was low current, so a series carbon resistor >plus an active "zener" on-chip sufficed for protection. > >(Everything bipolar.) Not like you had much of a technology choice decades ago? I pop TVS or zeners in stuff destined to be connected to 12 or 24V traction battery powered gear -- some nasty spikes in there too, including reversed battery. Grant. -- http://bugs.id.au/
From: JosephKK on 30 Apr 2010 07:32 On Thu, 29 Apr 2010 10:09:51 -0700 (PDT), "miso(a)sushi.com" <miso(a)sushi.com> wrote: >On Apr 26, 3:35 pm, Johnny5 <dirtylogicdesi...(a)gmail.com> wrote: >> I was curious if anyone had any insight into protecting an Opto- >> isolator LED input from load dump, Jumpstarts, and many of the other >> signals in the auto environment. FETS,CLIPPERS,Clamps? >> Thank you in advance, >> It is an open drain SSR. > >The automobile industry seriously needs to address providing DC to >their customers. They need a better connector instead of the cig plug, >and the DC should be conditioned. > >Ditto on transorb diodes. And what about the yammerheads that insist on plugging 700 W inverters into them?
From: Joerg on 30 Apr 2010 11:26
JosephKK wrote: > On Thu, 29 Apr 2010 10:09:51 -0700 (PDT), "miso(a)sushi.com" > <miso(a)sushi.com> wrote: > >> On Apr 26, 3:35 pm, Johnny5 <dirtylogicdesi...(a)gmail.com> wrote: >>> I was curious if anyone had any insight into protecting an Opto- >>> isolator LED input from load dump, Jumpstarts, and many of the other >>> signals in the auto environment. FETS,CLIPPERS,Clamps? >>> Thank you in advance, >>> It is an open drain SSR. >> The automobile industry seriously needs to address providing DC to >> their customers. They need a better connector instead of the cig plug, >> and the DC should be conditioned. >> >> Ditto on transorb diodes. > > And what about the yammerheads that insist on plugging 700 W inverters > into them? That's where two wonderful inventions come into play: Fuses and breakers :-) -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM. |