At 03:13 PM 12/11/2013, RussellMc wrote:
>On 12 December 2013 10:56, David VanHorn <microbrix@gmail.com> wrote:
>
>Plus the ULN2803 has on board "catch diodes" - all connected to pin 9 if I
>have the mental image correct - diagonally opposite pin 1. Connect this to
>Vdd or to Vdd via a resistor or to ground via a zener or ... .

Note that the 2803 is an 18-pin package.  Channel inputs are pins=20
1-8, ground is pin 9, catch diodes are pin 10, channel outputs are=20
pins 11-18 (directly across from the associated input pins).

dwayne

--=20
Dwayne Reid   <dwayner@planet.eon.net>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
(780) 489-3199 voice          (780) 487-6397 fax
www.trinity-electronics.com
Custom Electronics Design and Manufacturing

--=20
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