Matt/W6NIA notes, off-list, that the driver in the KRC2 has protection
that makes the diode unnecessary ... but, personally, I'd still include
it anyway - it's just good practice...
~Iain / N6ML
[email protected] wrote:
> I cannot post to the group from this account right now, so feel free to
> paraphrase or repost.
>
> If he's using the KRC2, diodes won't be needed for either sink or source
> outputs. The TPIC6C595 driver includes transient protection for both type of
> output...
>
> 73,
> matt W6NIA
>
>
> May 29, 2009 12:16:12 PM, [email protected] <mailto:[email protected]> wrote:
>
>
>
> Vic K2VCO wrote:
> > Jack Smith wrote:
> >> Source = the device outputs current
> >> Sinks = the device pulls the current to ground.
> >
> > In practical terms, you can connect a 12v dc relay to a source terminal
> of the KRC2 and
> > ground the other side of it.
> >
> > To use a sink terminal, connect +12v dc to one terminal of the relay
> and
> ground the other one.
>
> Err, you mean connect the other one to the "sink terminal" :)
>
> You should also have a diode across the coil of the relay, of course,
> so your "sink terminal" doesn't get slammed as the magnetic field
> collapses when it's turned off.
>
> ~Iain / N6ML
>
>
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