Determine what value of current to limit the led

Assignment Help Electrical Engineering
Reference no: EM13267040

An LED with a rated range of Vf = 1.4 V to 1.8 V at If = 20 mA is connected to a driver circuit with a peak output of 14 V. What value of current? limiting resistor would be needed to limit the LED current to a maximum value of 20 mA?

Reference no: EM13267040

Questions Cloud

What must the angle of incidence be : A square room has 3 mirrored walls of length L with one side missing. A laser is fired from the center of the open side of the room with an angle of incidence, I, what must the angle of incidence be
What is the risk neutral probability p : A stock is currently priced at $100. Over each of the next two three month periods it is expected to increase by 10% or fall by 10%. Consider a six month call option with a strike of $95. The risk free rate is 8% per annum.
What is the hedge ratio of the put option : Consider a six month put option on a stock with a strike price of $32. The current stock price is $30 and over the next six months it is expected to rise to $36 or fall to $27. The risk free rate is 6%.
What was the proton''s speed as a fraction : The highest-energy cosmic ray ever detected had an energy of about 3.0x10^20 eV. Assume that this cosmic ray was a proton. What was the proton's speed as a fraction of c
Determine what value of current to limit the led : An LED with a rated range of Vf = 1.4 V to 1.8 V at If = 20 mA is connected to a driver circuit with a peak output of 14 V. What value of current. limiting resistor would be needed to limit the LED current to a maximum value of 20 mA.
Explain how many replicate determinations are necessary : A certain technique is known to have a mean of 0.500 and standard deviation of 1.84*10^-3. itis also known that Gaussian statistics apply. How many replicate determinations are necessary if the standard error of the mean is not to exceed 0.100%
Computing cost of manufactured and sold goods : Compute the cost of goods manufactured and cost of goods sold for Strike Marine Company for the most recent year using the amounts described below. Assume that raw materials inventory contains only direct materials.
What is the distance between the events in frame : Two events in regerence frame S occur 10 microseconds apart at the same point in space. What is the distance between the events in frame S'
Explain how many moles of air are contained in the tire : The tire is filled with dry air at sea level and a temperature of 60F to 32lb/in^2. Standard sea level pressure is 101325 Pa at 0 degree C (STP). How many moles of air are contained in the tire. How many molecules

Reviews

Write a Review

Electrical Engineering Questions & Answers

  What is the magnetic dipole moment of each cobalt atom

determine that the total field B within the sample is one tesla. Calculate M and determine what percentage of the volume now consists of domains with magnetization parallel to the field.

  What are the limitations of the proposed technology

1. Give a summary of the article, what is the basic concept and the key technology. 2. What are the differences, advantages and disadvantages of the proposed technology compared to conventional MOSFETs and BJTs.

  Design a minimum two-level nor-gate network

a) Design a minimum two-level NOR-gate network to realize the above function. b) Design a minimum three-level NOR-gate network to realize the above function.

  Design a compensator that gives a pm of 90 degrees

Given that KG =.0894, w=15.4, φ=-125 degrees and G(s) = [520(s+2)]/[s2(s+30)] design a compensator that gives a PM of 90 degrees and does not change the open loop bandwidth.

  Determine the self inductance of coil 1-l11

a) Determine the self inductance of coil 1, L11 b) Determine the self inductance of coil 2 L22 c) Determine the mutual inductance between the two coils, L12 or L21

  What is the difference between d flip-flop and j-k flip-flop

What is the difference between a D flip-flop and a J-K flip-flop How does the number of inputs affect the possible synchronous states of a flip-flop (Set, Reset, Hold, Toggle)

  Find the direction and magnitude of the energy transfer

A substance expands from V1 = 1 ft3 to V2 = 6 ft3 in a constant-pressure process at 100 lbf/in2. The initial and final internal energies are U1 = 40 Btu and U2 = 20 Btu, respectively.

  Define asynchronous and synchronous communication mode

What are the respective advantages and disadvantages of the asynchronous and synchronous communication modes from a reliability perspective?

  What is the new resistance level of a copper conductor wire

what is the new resistance level of a copper conductor wire if the lenght is changed from 200 ft to 400 ft, the area is changed from 50,000 CM to 0.10 in ^2 and the original resistance was 7 ohms

  What is the identification number of the packet

An IPv4 datagram has arrived with the following information in the header (in hexadecimal): Ox45 00 00 54 00 03 58 50 20 06 00 00 7C 4E 03 02 B4 OE OF 02 a. Is the packet corrupted b. Are there any options

  Determine what rc time constant must the filter have

Sketch the schematic for a RC low-pass filter with a 3 dB cutoff frequency of 500 Hz, i.e., the output at 500 Hz is 1/2 = 0.707 of the filter output at DC. What RC time constant must the filter have

  Calculate motor power when the reel turns at 60rpm

A large reel of paper installed at the end of a paper machine. d1 = 2m, J = 1000kgm^2, n1 = 60rpm, Tension on Paper = 1000N. Calculate: a. Motor power when the reel turns at 60rpm. b. Torque to increase speed to 120 rpm in 10 seconds

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd