Download BES2016 Pre-course test

BES2016
Pre-course test revealed
[K. Tammemäe]
Problem 1: LED circuit
Draw the circuit, calculate resistor value and the required
power rating of this resistor according to a given LED voltagecurrent diagram, the LED current (30mA) and the battery
voltage (9V).
+
Problem 2: CMOS
Describe the logic function
VA
VB
0
0
0
1
1
0
1
1
VOUT
Problem 3:
Simplify using Karnaugh
A
0
0
0
0
1
1
1
1
B
0
0
1
1
0
0
1
1
C
0
1
0
1
0
1
0
1
X
1
1
0
0
1
0
Problem 4: Implement the following
Boolean equation using NAND gates
• X = (A & B | A & B) & C
• De Morgan’s law: A | B = (A & B)
www.learnabout-electronics.org
Problem 5:
Number system conversions
• Hexadecimal to Decimal
• A3F16 
• Decimal to Binary
• 5310 
Problem 6: FSM design of elevator
• State Diagram
• Flowchart
[Wikipedia]
Problem 7: C programming
Sort an integer array, increasingly
for (i = 0; i < ( n - 1 ); i++)
{
for (j = 0; j < n - 1 - i; j++)
{
if (array[j] > array[j+1])
{
tmp= array[j];
array[j]
= array[j+1];
array[j+1]
= tmp;
}
}
}
Bubble sort
Nonoptimal
Incomplete
[Wikipedia]
Problem 8: Expectations
• The winner: uController programming in C
• Interfacing, peripherals, sensors, architectures,
practical usage and selection of uControllers,
troubleshooting, Real-time Operating Systems
• Understanding datasheets, (system) design,
teamwork, English, security, IoT, ARM, smart
home/things, more theory
• Arduino, NXP etc.
Conclusions
Kar- NAND Hex to Dec to State
LED resistor
CMOS
resistor power
naugh gates Dec Binary diagr
FlowC sort
chart
Success
rate %
24
16
16
39
8
61
90
34
34
40
so-so
rate %
7
13
36
22
36
-
-
22
27
20
Failure
rate %
69
71
48
39
56
39
10
44
39
40