LED
Typical LED forward bias voltage: 1.5 to 2.0 VTypical currents needed to light LED range from 2 to 15 mA.
Turning on a Diode (1)
V2 =3.3 VV1=3.3 V, LED is off.V1=0V, LED is on.
This method is used by the 7-segment LED display on basys 2
Turning on a Diode (2)
V1 =0.0 VV2=3.3 V, LED is on.V1=0V, LED is off.
This method is used by the LED outputs on on Basys 2
A 7-Segment Display Containing Seven Light Emitting Diodes
Used by Basis2
Segment Values Required to display hex digits from 0 to F
Display Lower Case d
K-map for the segment e
Erroneous Result
(Not the right way to display “C”)
Error in Representing “b”
1
1
1
1
1(missing!)
One Way of Representing “b”
1
1
1
1
1(missing!)
1
Showing Only 1 Digit