Trying to wrap my head around using a uln2803 or uln2003 to control a series of normally open relays.
I need to energize the relay from a TTL low signal (0V).
TTL output is normally 5v but goes low when activated . Anybody have a schematic where something like this is done?
I'm trying to avoid using more components to invert the TTL signal.
Thanks!
I need to energize the relay from a TTL low signal (0V).
TTL output is normally 5v but goes low when activated . Anybody have a schematic where something like this is done?
I'm trying to avoid using more components to invert the TTL signal.
Thanks!