AC VOLTMETER USING PIC (PDF)
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Title: SCHEMATIC1 : PAGE1
Author: bk
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5
4
3
2
1
R2
Bridge rectifier
160 kohms
3
2
160 Vac
2 x 0.33uF
IN2
+
4
BCX56-SOT89 1
HD04
2
D
3.3k
ZENER
D1
25v
+
1
J2
1
0
Ac-Neutral
3
R3
2
128 ohms
2w
Ac-Hot
V DD
U2
LM7805-SOT89
Q1
+
C5
330uF
25 V
0
D1
15V
ZENER
C3
33uF
10 V
D
0
0
0
V DD
R4
47k
J5
1
J6
ICDCK
U7
RE3/MCLR/VPP
MCLK
J5
I CD DAT
1
U4
1
IN1
2
C4
1
1
R1
0
J1
1
RB7/ICSPDAT/ICDDAT/SEG13
RA0/AN0/C1-/SEG12
RB6/ICSPCLK/ICDCK/SEG14
RA1/AN1/C2-/SEG7
RB5/COM1
RA2/AN2/C2+/VREF-/COM2
RB4/COM0
RA3/AN3/C1+/VREF+/COM3/SEG15
RB3/SEG3
RA4/C1OUT/T0CKI/SEG4
RB2/SEG2
C
C
J3
R5
1
1k
RA5/AN4/C2OUT/SS/SEG5
5v dc
0
EXTERNAL DC SOURCE
C1
VDD
15pF
20MHz
C2
0
R6
220
15pF
B
0
R7
R8
R9
10k
10k
10k
U3
1
RE1/AN6/SEG22
VDD
15
2
RE2/AN7/SEG23
GND/VSS
14
3
VDD
RD7/SEG20
13
4
VSS/GND
RD6/SEG19
12
RA7/OSC1/CLKI/T1OSI
RD5/SEG18
11
6
RA6/OSC2/CLKO/T1OSO
RD4/SEG17
10
7
RC0/VLCD1
RC7/RX/DT/SDI/SDA/SEG8
9
8
RC1/VLCD2
RC6/TX/CK/SCK/SCL/SEG9
RC2/VLCD3
RC5/T1CKI/CCP1/SEG10
RC3/SEG6
RC4/T1G/SDO/SEG11
RD0/COM3
RD3/SEG16
RD1
J4
16
RB0/INT/SEG0
V DD
0
LCD
X1
RB1/SEG1
RE0/AN5/SEG21
5
B
5v LCD
RD2/CCP2
V DD
1
GND
PIC16F914/PDIP
0
A
A
5
4
3
2
1
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