RoyalTek RDR-3100 - Manual (Page 7)

RDR-3100 User Manual
Figure 1.
Odometer/Reverse Circuit
V_5V
R19
0
V_5V
C11
0.01uF
U4
LTV817S
2 3
4 1
D1
1N4148
R15 20
V_3V3 V_3V3
R17 22K
Q2
2SC2412K
3
2
1
R12
220
R11
1k R13
220
Odometer
D2
1N4148
R23 0
Q1
2SC2412K
3
2
1
TP32
1
1
R24 22K
TP31
1
1
rev erse_A/D
R25
100K
Rev erse
R14
0
R18
270
R22
100K C10
0.01uF
odometer_A/D
U5 LTV817S
2 3
4 1
R47
0
7