I What is the Maximum value of the Resistor R1, to ensure that the LEDS D1 and D2 are leasing light? 2 What is the value of the Resistor R1, to ensure that the LEDS D1 and D2 are working with meir nominal current? roblem #3 Siven the Circuit 3 D2 GREEN R1 D1 BAT1 RED D3
Load flow analysis
Load flow analysis is a study or numerical calculation of the power flow of power in steady-state conditions in any electrical system. It is used to determine the flow of power (real and reactive), voltage, or current in a system under any load conditions.
Nodal Matrix
The nodal matrix or simply known as admittance matrix, generally in engineering term it is called Y Matrix or Y bus, since it involve matrices so it is also referred as a n into n order matrix that represents a power system with n number of buses. It shows the buses' nodal admittance in a power system. The Y matrix is rather sparse in actual systems with thousands of buses. In the power system the transmission cables connect each bus to only a few other buses. Also the important data that one needs for have a power flow study is the Y Matrix.
Types of Buses
A bus is a type of system of communication that transfers data between the components inside a computer or between two or more computers. With multiple hardware connections, the earlier buses were parallel electrical wires but the term "bus" is now used for any type of physical arrangement which provides the same type of logical functions similar to the parallel electrical bus. Both parallel and bit connections are used by modern buses. They can be wired either electrical parallel or daisy chain topology or are connected by hubs which are switched same as in the case of Universal Serial Bus or USB.
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Homework #8 – LED Circuits
NOTE: to solve the problems you will use the following assumption
1) A LED (disregarding the color) need at least If=5mA or more nsure
that the LED lights up
2) The standard value of the current for the nominal work of a LED
(disregarding the color) is 20 mA
3) These are the values of the Voltage Forward of the LED by colors.
This voltage ensure that the LED conducts and lights up. In this
exercise Vf will not depends on the current If (in real life Vf
changes but not significantly with the current)
a. Vf(RED) = 1.9 Volts
b. Vf(YELLOW) = 2.1 Volts
c. Vf(GREEN) = 2.3 Volts
d. Vf(BLUE) = 3.4 Volts
e. Vf(WHITE) = 3.9 Volts
Problem #1
Given the Circuit 1
R1
D1
BAT1
9V
RED-
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Given the Circuit 2
D2
GREEN
R1
D1
RED -
BAT1
Circuit 2
2.1 What is the Maximum value of the Resistor R1, to ensure that the LEDS D1 and D2 are
releasing light?
2.2 What is the value of the Resistor R1, to ensure that the LEDS D1 and D2 are working with
their nominal current?
Problem #3
Given the Circuit 3
R1
D2
GREEN
D1
BAT1
RED
D3
BLUE
Circuit 3
3.1 What is the Maximum value of the Resistor R1, to ensure that the LEDS D1, D2 and D3 are
releasing light?
3.2 What is the value of the Resistor R1, to ensure that the LEDS D1 D2 and D3 are working with
their nominal current?
MacBook Air
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