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

["Ian B" <Ian@xxxxxxx>]

Yep, found out the hard way as usual!!

Thanks anyway

Ian B

> -----Original Message-----
> From: Alancc [mailto:alan.cc@xxxxxxx]
> Sent: 25 April 2002 18:17
> To: ukha_d@xxxxxxx
> Subject: Re: Re: Re: White LED Lighting... was RE: [ukha_d] Re: ADSL
vs
> Cable
>
>
> 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)
> >
> >
>
>
>
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