Appendix b – schematic diagrams – Elecraft W2 Watt-meter Manual User Manual
Page 20
20
Appendix B – Schematic Diagrams
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
R
t Angle at Rear Panel
Pin 4 i
s
ke
ye
d
Mount on Bottom Cover
2009030901
A
W2 Power Meter
B
11
Saturday, August 22, 2009
Title
S
iz
e
Document Number
Rev
Date:
Sheet
of
PWRHOLD
SENSOR
MUXB PWM
RXD
RCK SER
MCLR
MUXA MUXB
SRCK
SER RANGE SENSOR
PGD PGC
MCLR
VSCL2
VREF1
VSCL1
VSCL1
SCALE1
VSCL2 SCALE2
VFWD1
VFWD2 SENSE2
VREF1
VREV1
VFWD1 VFWD2
VREF2
VREV2
VREF2
VREV2
TXD
T
XD
MUXA
MUX0
MUX0
SCALE2
SCALE1
POWER
P
WRHOLD
SWSENSE
RXD
SENSE1
MUX1
SENSE1
PGC PGD
SWSENSE
SRCK
RCK
POWER
RANGE
SENSE2
ALARM
PWM
MUX1
SELECT
VREV1
+5
V
+5
V
+5
V
+5
V
+5
V
+5
V
+5
V
+5
V
+5
V
+5
V
+5
V
12VUNSW
+5
V
+5
V
+5
V
+5
V
12VUNSW
VLED
VLED
12V
12V
+5
V
VLED
C24 0.01 uF
R22
120R
J1
SENSOR 2
1 2 3 4 5 6 7 8 9 10
K1
G6E-134P
7
10
12
1 6
R11
1K
C1 0.01 uF
TP
1
GND
1
J6
2.1mm
1 2 3
C26 0.01 uF
R16
10K
R27
100K
R15
1K
J5A
SJD-3512-33
1U
4U 5U
C3 0.01 uF
R18
47K
R5
1K
MT
G
6
GND
1
U1
PIC18F2520
1
2 3 4 5 6
7
8
9
10
11 12 13
14
15 16
17 18
19
20
21 22 23 24 25 26
27 28
MCLR
RA0/AN0 RA1/AN1 RA2/AN2 RA3/AN3
RA4
SS/RA5
VSS
OSC1
OSC2
RC0 RC1 RC2
SCK/RC3
SDI/RC4 SDO/RC5
RC6 RC7
VSS
VDD
RB0 RB1 RB2 RB3 RB4 RB5
PGC PGD
R36
1M
R29 1K
1
3
2
C5 0.1 uF
R32
30K
Q6 2N7002K
1
3
2
C20
0.01 uF
R24
10K
Q1 2N7002K
1
3
2
J3
ICD-2
1 2 3 4 5 6
TP
5
GND
1
FB2
BEAD
FB1
BEAD
R2
1K
R19
120R
C11 0.01 uF
R17
10K
Y1
16.0 MHz
C6
22 pF
D4
S1M
C15 0.01 uF
R33
10K
D1
BAT
54
1
3
TP
4
+5V
1
R9
10K
C34 0.1 uF
C13 0.01 uF
MT
G
3
GND
1
J5B
SJD-3512-33
1L
4L 5L
Q4
2N7002K
1
3
2
Q2
2N7002K
1
3
2
R41
1M
TP
3
SPARE
1
P1
FP
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
C9
0.01 uF
C25 0.01 uF
R38
1M
R20
120R
+
C31
10 uF/25V
R14
1K
U3
NJM317F
1
2
4
3
ADJ
OUT
TAB
IN
C18
0.01 uF
C19 0.01 uF
R6
1K
R7
10K
Q7 2N7002K
1
3
2
C30 0.1 uF
D2
MMBD914
2
3
R8
1K
MT
G
5
GND
1
R23
10K
R3
1K
C37 0.1 uF
TP
2
SPARE
1
U2
CD74HC4052M
1
2
3
4
5
6
7
8
9
10
11
12
13
14 15
16
Y0
Y2
Y
Y3
Y1
INH
VEE
VSS
A1
A0
X3
X0
X
X1 X2
VCC
J2
SENSOR 1
1 2 3 4 5 6 7 8 9 10
J4A RCJ
-2
2XX
3
1
R28
240R
R25
1K
C14 0.01 uF
R42
1M
FB3
BEAD
C2 0.01 uF
C28 0.01 uF
Q5 ZXTP2029FTA
1
2
3
R37
1M
R21
120R
R12
1K
R1
1K
C33 0.1 uF
+
C35
10 uF/25V
C22
0.1 uF
U4
UA78M05
1
2
4
3
+VIN
GND
T
AB
OUT
C27 0.01 uF
R4
10K
MT
G
2
GND
1
MT
G
1
GND
1
C7
22 pF
R13
1K
R26
22K
C12
0.1 uF
R31
10K
C16 0.1 uF
C4
0.01 uF
J4B RCJ
-2
2XX
2
1
R40
1M
R30
240R
R39
1M
D3
MMBD914
2
3
C23
0.01 uF
C36 0.1 uF
R34
1K
C29 0.1 uF
C21
0.01 uF
C10
0.01 uF
R35
1M
C17 0.01 uF
+
C32
10 uF/25V
R10
1K
Q3
M
M
B
T3904
1
2
3
MT
G
4
GND
1
C8
0.01 uF