V1 Martel Electronics, V1 Datasheet - Page 3

• Manufacturer Part Number: V1
• Description: VOLTMETER LCD 200MV 0.25" DIG HT
• Manufacturer: Martel Electronics
• Series: Vr
• Type: Voltmeterr

Specifications of V1

• Measuring Range: 200mVDC
• Display Style: Black Characters, Grey Background
• Display Type: LCD
• Display Face Size: 1.18" L x 0.31" W (30.0 x 8.0mm)
• Display Digits: 3.5
• Display Digits - Height: 0.252" (6.40mm)
• Backlight: Without
• Mounting Type: Panel Mount
• Termination: PC Pins
• Voltage - Supply: 7 ~ 12VDC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 227-1059

PIN FUNCTIONS
1.
2.
3.
4.
5.
6.
7.
8.
Solder Links:
L1
CIRCUIT DIAGRAM
INLO
INHI
V+
V-
INHI
INLO
XDP
DP1
DP2
DP3
V+
V-
1
3
4
2
L1
V+
Normally Closed, connects COM to INLO.
Positive power supply connection.
Negative power supply connection.
Positive measuring input with reference to IN LO.
Negative measuring input with reference to IN HI.
Connect to DP1, 2 or 3 to display required decimal point.
Connect to XDP to display Decimal Point 1 (199.9).
Connect to XDP to display Decimal Point 2 (19.99).
Connect to XDP to display Decimal Point 3 (1.999).
1M
R2
R6
100k
R5
3k
R4
1.5k
100nF
180k
C3
R1
100nF
R3
100nF
220nF
C4
C1
C2
100k
C5
100pF
27
28
29
31
30
32
34
33
35
36
40
39
38
INT
BUF
A/Z
IN HI
IN LO
COM
CREF+
CREF-
REF LO
REF HI
OSC1
OSC2
OSC3
V+
IC1
V- TEST
26
1
www.martelmeters.com
POL
bc4
37
BP
a1
b1
d1
e1
a2
b2
d2
e2
a3
b3
d3
e3
c1
g1
c2
g2
c3
g3
f1
f2
f3
5
4
3
2
8
6
7
12
11
10
9
14
13
25
23
16
24
15
18
17
22
19
20
21
R10
100k
Q1
3904
V+
12
11
10
15
13
14
19
17
16
21
20
24
23
22
25
26
27
29
30
18
9
7
5
4
2
1
Analogue inputs must be no closer than 1V
to either the positive or negative supply.
a1
b1
c1
d1
e1
f1
g1
a2
b2
c2
d2
e2
f2
g2
a3
b3
c3
d3
e3
f3
g3
b4
c4
POL
COM
COM
R11
100k
LCD1
LOBAT
DP1
DP2
DP3
199.9
19.99
1.999
28
8
6
3
3½ Digit LCD Voltmeter Module
R9
1M
R8
1M
R7
1M
page 3 of 4
7
6
8
5
DP1
DP2
DP3
XDP