Question

The current through each LED, assuming the Basys3 outputs 3.3 volts is:

a) Electrical circuit analysis
b) Semiconductor physics
c) LED voltage drop
d) Ohm's Law application

Answer 1

d), To determine the current through an LED with a Basys3 output of 3.3 volts, apply Ohm's Law after considering the LED's forward voltage drop. The formula I = V / R is used, with V being the Basys3 voltage minus the LED forward voltage, and R being the resistor value.

Step-by-step explanation:

The question asks to determine the current through an LED given that the output voltage of a Basys3 board is 3.3 volts. To calculate this, you would need to use Ohm's Law, which states that the voltage (V) across a resistor is equal to the current (I) flowing through it multiplied by the resistance (R) of the resistor, shown as the equation V = IR. In the case of an LED, you must also consider the forward voltage drop of the LED, which is typically around 0.7 volts for a standard red LED, but can vary depending on the type of LED. The forward voltage drop of the LED needs to be subtracted from the 3.3 volts supplied by the Basys3 board to find the voltage across any series resistor that is limiting the current to the LED. Once this is known, the current can be calculated by rearranging Ohm's law to I = V / R, where V is the voltage across the resistor and R is the resistance.