David Schmidt wrote:
>
> Thanks for the info that the part I am looking for is the
> ULN2803.  Now, does anyone know of a cheap, no haggle place to buy
> 10 pieces?  The Motorola web site says they're $0.61 each in 20
> piece quantities but I think FAI has a $50.00 minimum. Or should
> I buy a hundred and resell them?
>
> Also, the specs list 500mA max collector current.  Is there a total max
> for all channels on? (Like the PIC, 25mA sink per pin, 50mA max
> per port).  I couldn't find it.
>
> Thanks again.
> Dave

From the catalogue I am looking at now I quote "OUTPUTS MAY BE
PARALLELED
TO GIVE UP TO 4 AMPS AT 50V" (MAPLIN UK)

Relay drivers that can only sink 25mA per pin, seems very unlikley

--
Peter Cousens
email: peter@cousens.her.forthnet.gr
snailmail: Peter Cousens, karteros, Heraklion, Crete, 75100, Greece,