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LED Display. LED. Typical LED forward bias voltage: 1.5 to 2.0 V Typical currents needed to light LED range from 2 to 15 mA. Turning on a Diode (1). V2 =3.3 V V1=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).

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LED

Typical LED forward bias voltage: 1.5 to 2.0 V

Typical currents needed to light LED range from 2 to 15 mA.


Turning on a diode 1
Turning on a Diode (1)

V2 =3.3 V

V1=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
Turning on a Diode (2)

V1 =0.0 V

V2=3.3 V, LED is on.

V1=0V, LED is off.

This method is used by the LED outputs on onBasys 2






Erroneous result
Erroneous Result

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Error in Representing “b”

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1

(missing!)

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One way of representing b
One Way of Representing “b”

1

1

(missing!)

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