To all who replied Thanks, got a 4x4 autoelectrician and he's sorting it out.
Cheers ----- Original Message ----- From: "Grant Parnell" <[EMAIL PROTECTED]> To: "Ulung Gurtala" <[EMAIL PROTECTED]> Cc: "SLUG Sydney Linux User Group" <[EMAIL PROTECTED]> Sent: Thursday, October 23, 2003 11:45 PM Subject: Re: [SLUG] OT:24VDC PC UPS > > Battery -+---|<----/\/\/\/---------+----regulator---Alternator > | | > ---->|-------+--------|<--| > | > | > Computer > > For the diodes above you should probably use a couple of power diodes in > parrallel. The resistor depends on the charge current you want. You could > make it 2 resistors like this:- > > GND-----+----Battery----|<----/\/\/\/---+---\/\/\/\----+--regulator > | | > ----------->|-------------------- > Zenner (or a series of them) to limit voltage to say 30V > > Maybe add a fuse in series with the battery to prevent overcharging > current if the zenner's blow or the PC short circuits. > > Yeah so my formal training was in Electronics :-) > > On Thu, 23 Oct 2003, Ulung Gurtala wrote: > > > This is slighltly off topic but I'm sure someone have come across a similar > > problem and have a solution for it. > > > > I have a 24vDC PC thats going in a truck. I want to ensure there is a reliable > > power supply and ensure that if the power is interupted the pc will not > > shutdown. I can source a 24v Battery with enough juice to run the pc for 15 min > > when the truck ignition is off. What Iam unsure of is the wirring and other > > electronic gear to ensure that whilst the truck is going (running) it is using a > > regulated 24v of the trucks electrical system and trickle charging the battery > > if it is not fully charged and if the truck ignition is off it uses the > > batteries and allows the users to shut the system down gracefully. > > > > Any help is appreciated. > > > > Cheers > > > > > > -- > ---<GRiP>--- > Electronic Hobyist, Former Arcadia BBS nut, Occasonal nudist, > Linux Guru, SLUG/AUUG/Linux Australia member, Sydney Flashmobber, > BMX rider, Walker, Raver & rave music lover, Big kid that refuses > grow up. I'd make a good family pet, take me home today! > Do people actually read these things? > > -- SLUG - Sydney Linux User's Group - http://slug.org.au/ More Info: http://lists.slug.org.au/listinfo/slug
