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

["Keith Doxey" <lists.diyha@xxxxxxx>]

You MUST remember to connect the positive Relay supply to the Common terminal for the ULN2803. Once you do that there is no difference to having external diodes.

 

You can also connect external diodes if you wish although the internal ones should be ample for any normal relay. Thats what the chip is designed for.....relay and solenoid driving!

 

http://www.onsemi.com/pub/Collateral/ULN2803-D.PDF

 

Keith

www.diyha.co.uk
www.kat5.tv

-----Original Message-----
From: Alancc [mailto:alan.cc@xxxxxxx]
Sent: 25 April 2002 21:14
To: ukha_d@xxxxxxxSubject: Re: Re: Re: White LED Lighting... was RE: [ukha_d] Re: ADSL vs Cable

Thats not a very helpfull reply Steve, why?

Alancc
----- Original Message -----
From: Steve B <steve@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Thursday, April 25, 2002 8:46 PM
Subject: Re: Re: Re: White LED Lighting... was RE: [ukha_d] Re: ADSL vs
Cable


> 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
> >
>



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