1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
13
13
14
14
15
16
U1
MCU SOIC16
a
g
c
dp
d
e
b
f
c1
c2
c3
1
OUT
2
IN
3
GND
U2
MD8250A 5.0v 300mA
D1
SD103AW 40V 300mA
C1
0.1uF
C3
10uF
PWR+
GND
VIN
R1
330k
W1
50k
R3
6.8k
220
a
11
b
7
c
4
d
2
e
1
f
10
g
5
dp
3
C
1
1
2
C
2
9
C
3
8
S1
3DGIT 7SEG CASODE COMMON
220
220
220
220
220
220
220
a
b
c
d
e
f
g
dp
c1
c2
c3
2
1
J1
2WIRE
Voltage Divider
VIN x0.0176 to 0.0202
Actual chip Vin vs display
1,970mV "99.9"
1,580mV "80.0"
988mV "50.0"
394mV "20.0"
99mV "5.0"
20mV "1.0"
10mV "0.5"