RE: HomeVision Supply Voltage...

["Keith Doxey" <ukha@xxxxxxx>]

Ah, right.

I thought you were using a PC type power supply with 5V @ >20A and 12V @
>6A

No problem using the diodes. Solder them inline with the lead and put
heatshrink over it.

Keith

> -----Original Message-----
> From: Phil Harris [mailto:phillip.harris1@xxxxxxx]
> Sent: 18 October 2001 20:00
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] HomeVision Supply Voltage...
>
>
>
> High current is relative ... the PSU with HV is 300mA, these
> external drive
> ones are 2A at 12 and 5v so nothing too meaty. I might well give
> the diodes
> a go ... any downsides to that way of doing it?
>
> Cheers
>
> Phil
>
> > -----Original Message-----
> > From: Keith Doxey [mailto:ukha@xxxxxxx]
> > Sent: 18 October 2001 18:58
> > To: ukha_d@xxxxxxx
> > Subject: RE: [ukha_d] HomeVision Supply Voltage...
> >
> >
> > The voltage regulator can handle an input of upto 35V.
> > HOWEVER.... the more
> > voltage the regulator has to drop, the hotter it will run. The
> heatsink is
> > not designed to dissipate that amount of heat.
> >
> > A simple way round it would be to put 5 x 1N4001 in series with
> the input.
> > Each diode will drop about 0.6V giving a total drop of about
3Volts.
> >
> > That will safely drop your 12V supply to 9V without generating
any heat.
> >
> > Dont forget to fit fuses to the output leads of your PSU. It will
> > be capable
> > of very high currents and you dont want anything to burn up. The
PSU may
> > well shut down in the event of a fault but you cant guarantee
> > that. Also by
> > using seperate fuses for multiple outputs you wont lose the whole
system
> > because on remote device was blowing the fuse/shutting down the
PSU.
> >
> > HTH
> >
> > Keith
>
>
>
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