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The objective of this lab is to design a point-to-point ZigBee network using the Xbee module. Each microcontroller will have a keypad and a two-line LCD display. When the operator types on the keypad, characters are displayed on one line of the LCD. When the operator hits the send key, those characters are sent and eventually displayed on the second line of the LCD of the other microcontroller. Debug the system in a bottom-up manner. Write simple main programs in the Rx and Tx systems to test the low-level functionality of the interface. Add appropriate debugging instruments, such as profiles and dumps. Connect unused pins from both devices to a single logic analyzer and record a thread profile (which program runs when) as a stream of data is passed from the Tx system to the Rx system. Write a main program to measure maximum bandwidth of your channel without using hardware flow control. Furthermore, you should determine which component limits bandwidth. Modify the transmitter so it outputs pseudo data as fast as possible. Modify the receiver so it does not display data on the LCD. Rather, the receiver will check for this pattern of characters and count the number of errors. Add minimally intrusive debugging instruments to determine if and where data is lost. Measure the maximum range of your system. In particular, find the maximum distance where the system performs reliable communication.
The synchronous motor is operating at 90% of its output rating. What must the power factor of the synchronous motor be adjusted toso that the overall power factor of the system is 0.97 lagging
A firefighter of mass 85 kg slides down a ver tical pole with an acceleration of 5 m/s2. The acceleration of gravity is 10 m/s2 . What is the friction force that acts on him
A message signal, x(t) has a bandwidth of 15 kHz and an average power of 0.5 W. This signal is to be uniformly quantized with an input range of range of +-5 V. What is the bit rate of the corresponding PCM signal if the SQNR is to be greater than ..
the input audio frequency range is f 0 3.5 khz.the adc operates at the programmable sample rate of fs n8khz n an
Where do the electrons entering the filament come from? Where do they go after exiting?
When one push button is pushed, the selected soda is dispensed and the machine returns to its initial state. One other feature is that an LED comes on to warn the user that two quarters are not available for change, so if a second $1 bill is inser..
The threshold voltage is eight times larger than the absolute value of the bulk potential, while the oxide is 20 nm thick. Find the doping density of the substrate and indicate whether the substrate is doped with acceptors or donors.
A thin conducting wire of length 3w forms a planar equilateral triangle. A Direct current I flows in the wire. Find the magnetic flux density at the center of that triangle.
Suppose that we want to determine how many of the bits in a six-bit unsigned number are equal to 1. Design the simplest circuit that can accomplish this task.
Why are overmodulated and carrier suppressed AM signals a problem from the standpoint of the receiver. Why (in what siuations) might DSB-SC be prefered over standard AM.
In addition, assume that your house is the only one using electric power. At a substation the primary of a step-down transformer (turns ratio = 1:26) receives the voltage from the high-voltage transmission line.
Determine the phase relationship between i(t) and v(t). i(t) = 5 sin(377t - 10o) Av(t) = 10 cos(377t + 50o) V Determine the phase relationship between i(t) and v(t).
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