Wiring for 4 digit 7 Segment LED Display
Posted: Thu Jul 29, 2010 1:39 am
Hello,
Looks like this Macro is configured as a 4 digit Common Anode multiplexed display.
Im using a 16F887
Should the Anode lines be driven through an NPN transistor - say with a 1K Ohm as Base resistor ?- this would mean that a logic 1 on the base of the NPN 's from the 16F887 would drive the Anodes high. For a Segment to be lit is the Flowcode logic for the Macro driving the segments to ground to enable them - so high on the anode and low on the segment that's supposed to be on.
Can you confirm
Thanks
Looks like this Macro is configured as a 4 digit Common Anode multiplexed display.
Im using a 16F887
Should the Anode lines be driven through an NPN transistor - say with a 1K Ohm as Base resistor ?- this would mean that a logic 1 on the base of the NPN 's from the 16F887 would drive the Anodes high. For a Segment to be lit is the Flowcode logic for the Macro driving the segments to ground to enable them - so high on the anode and low on the segment that's supposed to be on.
Can you confirm
Thanks