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RE: HomeVision Supply Voltage...
- To: <ukha_d@xxxxxxx>
- Subject: RE: HomeVision Supply Voltage...
- From: "Phil Harris" <phillip.harris1@xxxxxxx>
- Date: Thu, 18 Oct 2001 19:59:43 +0100
- Delivered-to: mailing list ukha_d@xxxxxxx
- Mailing-list: list ukha_d@xxxxxxx; contact
ukha_d-owner@xxxxxxx
- Reply-to: ukha_d@xxxxxxx
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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