Design a circuit to light a red light-emitting diode

Assignment Help Electrical Engineering

Reference no: EM13285202

Design a circuit to light a red light-emitting diode (LED). The LED current must be about 10{15 mA and no more! The voltage drop across the diode will be about 1 V, but do not connect a voltage source directly to the diode; the current in the diode is a very strong function of the voltage applied across it, and chances are that the diode current would exceed the maximum allowed if directly connected to a supply voltage.

NOTE:Nominally, the short lead of the diode is the cathode, i.e., the negative lead. However, you can identify the cathode more reliably by noting that one side of the LED's housing has a at spot at the base; the terminal closest to this at spot is the cathode.
This word is important! To an engineer, about means within an order of magnitude. So, \about 1 V" means somewhere in the range 0.1{10 V. When you turn on the power supply in your circuit, start it at the low end of that range and slowly increase the voltage until the LED begins emitting light. Of course, make sure you are monitoring the current through the LED as you do this so that you do not exceed the maximum allowable current.

Reference no: EM13285202

Questions Cloud

How many shots of tire must be taken to correctly capture : A car travels at 30 km/hour. The diameter of the tire is 50 cm. How many shots of the tire must be taken to correctly capture the motion of the wheels

Creative strategy and objectives for an advertising campaign : Identify a minimum of three of the most important issues that must be considered when writing the creative strategy and objectives for an advertising campaign. Interpret the steps and issues and evaluate how each component affects buying behavior.

Find the cheetah average acceleration during short sprint : The cheetah can reach a top speed of 114 km/h (71 mi/h). While chasing its prey in a short sprint, find the cheetah's average acceleration during the short sprint

Determine the five-year equivalent annual annuity : Determine the five-year equivalent annual annuity of the following project if the ap¬propriate discount rate is 16%.

Design a circuit to light a red light-emitting diode : Nominally, the short lead of the diode is the cathode, i.e., the negative lead. However, you can identify the cathode more reliably by noting that one side of the LED's housing has a at spot at the base; the terminal closest to this at spot is the..

For a particular reaction the delta : For a particular reaction the delta H is -13.8k/j mole and the delta S is 60.1 J/K*mol. Calculate the delta G in kj for this reaction at 37 C to the nearest tenth of KJ.

How fast is the car going at the end of the braking period : A car starts from rest and travels for 5.0 s with a uniform acceleration of +1.8 m/s2. How fast is the car going at the end of the braking period

The change in entropy for a particular reaction : The change in entropy for a particular reaction is -22J/mole-k. In order for the reaction to be spontaneous at a temperature of 290K, the delta H must be below what value in KJ/mole?

Determine what is the aliased frequency of the signal : If the frequency of a signal is 120 Hz and the sampling frequency is 150 Hz, what is the aliased frequency of the signal

User Account

All Pages