Opto-isolated relay board - latest

["Ian B" <Ian@xxxxxxx>]

Hi all

I have a design for the board. At the moment I am trying to figure out a
way
of adapting the input side of things so that it works from both HV and
Comfort. At the moment I am somewhere between the two.

The opto bit and the relays are all a proven design. The diodes are not
wired in correctly at the moment (I don't think) but are really on there
so
I don't forget them. There are power LED's, auto reset thermal fuses
and
individual LED's for the outputs. Lots of fun stuff. I am a short way
from
the first prototype I hope. I will keep folks informed when the first
prototype rolls out of the etching tank.

In the mean time the design is on my web site as of later this evening
for
those interested. Note that it is not the final version, just one in
working. There is no text around it yet either. As always you will find
it
at www.mollyology.com then under projects. It is a pdf picture.

I don't have any further ideas on cost yet but I will be getting relays
etc.
>from
but don't let this go to your head. Other parts all add up.

Ian B

> -----Original Message-----
> From: steve.cooper@xxxxxxx [mailto:steve.cooper@xxxxxxx]
> Sent: 25 April 2002 12:29
> To: ukha_d@xxxxxxx
> Subject: RE: Re: Re: White LED Lighting... was RE: [ukha_d] Re: ADSL
vs
> Cable
>
>
>
> Ian
>
> Talking of opto-isolated relay board.  Have you had chance to
> start looking
> at the design and work out the approx. cost yet?
>
> S.
>
>
>
>
>
>                    
"i.bird@xxxxxxx
>
>                    
.net"
<Ian           To:
> "ukha_d@xxxxxxx" <ukha_d@xxxxxxx>
>
>                    
Sent
by:            
cc:
>
>                    
"i.bird@tesco       
Subject:     RE: Re: Re:
> White LED Lighting... was RE: [ukha_d] Re: ADSL vs Cable
>                    
.net" <i.bird
>
>
>
>
>
>                    
25/04/02
>
>                    
12:14
>
>                    
Please
>
>                    
respond to
>
>                    
ukha_d
>
>
>
>
>
>
>
>
> > 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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