ie1206 embedded electronicskth.s3-website-eu-west-1.amazonaws.com/ie1206/... · phasor j ωpwm ccp...
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IE1206 Embedded Electronics
Transients PWM
Phasor jω PWM CCP KAP/IND-sensor
Le1
Le3
Le6
Le8
Le2
Ex1
Le9
Ex4 Le7
Written exam
William Sandqvist [email protected]
PIC-block Documentation, Serial com Pulse sensorsI, U, R, P, serial and parallell
Ex2
Ex5
Kirchhoffs laws Node analysis Two ports R2R AD
Trafo, Ethernet contactLe13
Pulse sensors, Menu program
Le4
KC1 LAB1
KC3 LAB3
KC4 LAB4
Ex3Le5 KC2 LAB2 Two ports, AD, Comparator/Schmitt
Step-up, RC-oscillator
Le10Ex6 LC-osc, DC-motor, CCP PWM
LP-filter TrafoLe12 Ex7 Display
Le11
•••• Start of programing task
•••• Display of programing task
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William Sandqvist [email protected]
Closed circuit?220 V
a)
220 V
b)
220 V
c)220 V
d)
103
Current can only flow through a circuit on condition there is a closed circuit.
Describe in words the action of circuits a) …d) when when you operate the two switches.
( All the circuits are perhaps not as useful … )
•••• discussion.
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William Sandqvist [email protected]
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William Sandqvist [email protected]
Series resistors
no current = not included in circuit!
178324 =+++=ERSR
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William Sandqvist [email protected]
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William Sandqvist [email protected]
Equivalent resistance (1.2)
R1 = 1 ΩR2 = 21 ΩR3 = 42 ΩR4 = 30 Ω
RERS= 30//(1+21//42)
Ω=⇒=+⋅=
=+⇒=+⋅=
10101530
153015//30
15)42//211(144221
422142//21
ERSR
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William Sandqvist [email protected]
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William Sandqvist [email protected]
N same value in parallell
N
RNR
R
N
RRR
RRRR
ERS
ERS
N
=
=++=
====
)(
11121
L
L
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William Sandqvist [email protected]
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William Sandqvist [email protected]
Equivalent resistance (1.6)
RTOT = 2+(12//12)//(24//24)
// means parallell connection
Ω=+=
=+⋅=
==
642
4126
126)24//24//()12//12(
1224//24612//12
TOTR
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William Sandqvist [email protected]
Equivalent resistance (1.1)
RTOT = 1//(0,5+0,5) +1//(0,5+0,5) =1//1+1//1= 0,5+0,5 = 1
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William Sandqvist [email protected]
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William Sandqvist [email protected]
Equivalent resistance (1.8)
RTOT = (2+20//5)//(20//5+2)
Ω=
==+=+⋅+=+
3
36//6642520
5202)5//202(
TOTR
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William Sandqvist [email protected]
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William Sandqvist [email protected]
Equivalent resistance (1.10)
a) RERS = 10/2 = 5 kΩ
b) RERS = 5/2 + 5/2 = 5 kΩ
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William Sandqvist [email protected]
Equivalent resistance (1.10)
a) RERS = 10/2 = 5 kΩ
b) RERS = 5/2 + 5/2 = 5 kΩ
c) RERS = 0 Ω !
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William Sandqvist [email protected]
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William Sandqvist [email protected]
Voltage divider
According to the voltage divider formula tyou get a divided voltage, for example U1across the resistor R1, by multiplying the total voltage U with a voltage division factor. This voltage division factor is the resistance R1 divided by the sum of all the resistorss that are in the series connection.
DividedVoltage
TotalVoltage
Voltagedivisionfactor
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Resistive sensors, rotate and slide resistances
William Sandqvist [email protected]
xx
R = RTOT⋅x
RTOTRTOT
RR
x relative movement/rotation 0 < x <1
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William Sandqvist [email protected]
Potentiometer with load (1.11)
123456789
10
0,2 0,4 0,6 0,8 1,0
U [V]
x
At x = 0 and x = 1 then U = 0 and U = 5V.At x = 0,5 the load RB draws current from the voltage divider and this ” reduce”U.
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Potentiometer with load ?
William Sandqvist [email protected]
Would you happen to wish for any of the non-linear relationship that exists in the figure, it costs apparently just an extra resistor R2!
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William Sandqvist [email protected]
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William Sandqvist [email protected]
Seriel circuit (3.1)
A19,08,10
2
8,108,44,26,321268
==
=++=−+
I
Determine the current I, its magnitude and direction.
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William Sandqvist [email protected]
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William Sandqvist [email protected]
4 Ω
4 Ω 4 Ω
10 V
E
149
+U =?
-
Ω1,5
=?I0,5 Ω
Serial – parallel circuits (3.4)Calculate current I = ? And voltage U = ? for the serial-parallel circuit in the figure.
Calculate the equivalent resistance:
RERS= 2//(4//4) = 2//2 = 1Ω
214
110 =
+=RERSU
Calculate voltage over the equivalent resistor URERS
Current I = URERS/4 = 2/4 = 0,5 A
Voltage V5,05,05,1
5,02 =
+=U
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William Sandqvist [email protected]
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William Sandqvist [email protected]
Serial – parallel circuits (3.3)
U+ -
E
203
12V
2R
R1
R
Ω9
R18 Ω
IR
Ω63 4 5
12Ω
24 Ω
Calculate current I = ? And voltage U = ? for the serial-parallel circuit in the figure.
36
18
18
6
18
312
6
1
18
1
9
118
1224
12245//4//3
5//4//32//1 ==⇒=++=++==
+⋅= R
RR
Voltage divider:
A55,06
73,81273,8
38
812
5
5//4//35//4//3 =−==⇒−=⇒=
+=
R
UIUEUU
We start by calculating two equivalent resistances:
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William Sandqvist [email protected]
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William Sandqvist [email protected]
Serial – parallel circuits (3.5)R 2
1R R 3 R5 +- U
E1Ω Ω Ω6 2
Ω4 R4 Ω1
36V
I
217
Calculate current I = ? And voltage U= ? for the serial-parallel circuit in the figure.
2216
)21(65,4//3 =
+++⋅=R
UR1 = 36 V. UR3 = UR3//4,5 can be calculated by voltage division:
A26
1212
42
236
3
3
25,4//3
5,4//33 ===⇒=
+=
+=
R
UI
RR
REU R
R
U can be calculated by voltage division:
V821
212
54
55,4//3 =
+=
+=
RR
RUU R
We calculates a equivalent resistance:
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William Sandqvist [email protected]