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2 Threads found on edaboard.com: uln2804a
Attached the snapshot of ULN280x datasheet. I think I need to use ULN2801 (without base series resistor) as my GPIOs are 3.3V Vdd logic and can source only 2 ma from each GPIO. The Voh and Vol for the GPIOs are 2.66 min and 0.66 max respectively. Will my MCU GPIOs able to drive the ULN2801 which inturn are connected to the relays.
Analog Circuit Design :: 29.08.2009 10:31 :: mahenreddy :: Replies: 1 :: Views: 2107
does uln2804a need a voltage supply?
if needed,on which pin it need to be connected?
and what is the value of the voltage?
Hobby Circuits and Small Projects Problems :: 06.10.2010 11:28 :: akem90 :: Replies: 4 :: Views: 1278