Re: Re: Re: White LED Lighting... was RE: Re: ADSL vs Cable

[Steve B <steve@xxxxxxx>]

Do not rely on the internal diodes

At 18:16 25/04/2002 +0100, you wrote:
>Homevision has the diodes already built in the ULN2803A chip, have a
look at
>page 106 in the HV bible.
>
>Alancc
>
>----- Original Message -----
>From: i.bird@xxxxxxx <Ian@xxxxxxx>
>To: <ukha_d@xxxxxxx>
>Sent: Thursday, April 25, 2002 12:14 PM
>Subject: RE: Re: Re: White LED Lighting... was RE: [ukha_d] Re: ADSL
vs
>Cable
>
>
> > > Andy (going to do some garden lighting too)
> >
> > If you do and plan to relay control it from something computer
related be
>aware of back emf and its effect on the control circuit. Opto-isolate
if
>poss or add shunt diodes or whatever they are called. Saves you
resetting HV
>every night (as happened to me) or worse.
> >
> > Ian (never afraid to blow something up through ignorance)
> >
> >
>
>
>For more information: 
><http://www.automatedhome.co.uk>http://www.automatedhome.co.uk
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Steve.

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