piclist 2002\06\18\034016a >
Thread: interfacing a a relay (automotive world)
face BY : Erik Jacobs email (remove spam text)

> You may try the ULNxxxx chips. Go to DigiKey.com and search for 'uln'. I
> think they have high gain (darlington) and already include the base
> resistor and reverse voltage diodes.

here is the techsheet for the ULN series:


Now... I'm a little confused with the COM connection.  Would that go to,
say, +12V, in the case where the relay coil is connected between +12V and
output C?  And E would just get tied to ground?

http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.


See also: www.piclist.com/techref/io/motors.htm?key=relay
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