XTAL218

XTAL119

ALE30EA31PSEN29

RST9

P0.0/AD0 39P0.1/AD1 38P0.2/AD2 37P0.3/AD3 36P0.4/AD4 35P0.5/AD5 34P0.6/AD6 33P0.7/AD7 32

P1.0/T21P1.1/T2EX2P1.23P1.34P1.45P1.56P1.67P1.78

P3.0/RXD 10P3.1/TXD 11P3.2/INT0 12P3.3/INT1 13

P3.4/T0 14

P3.7/RD 17P3.6/WR 16P3.5/T1 15

P2.7/A15 28

P2.0/A8 21P2.1/A9 22

P2.2/A10 23P2.3/A11 24P2.4/A12 25P2.5/A13 26P2.6/A14 27

U1

AT89C52VIN+6VIN-7

VREF/29

CLK IN4

A GND8

RD2WR3

INTR5

CS1

D GND10

DB7(MSB) 11DB6 12DB5 13DB4 14DB3 15DB2 16DB1 17DB0(LSB) 18

CLK R19

VCC 20U2

ADC0804

+5V

+5V

X1CRYSTAL

C1

30pFC230pF

R1100

C310uF

+5V

D714

D613

D512

D411

D310

D29

D18

D07

E6

RW5

RS4

VSS

1VD

D2

VEE

3

LCD1LM032L

54%

RV15k

+5V

23456789

1RP1

RESPACK-8

+5V

R210k

C4150pF

R38.2k

BAT15V

BAT25V

R410k

R550k

+0.5v

Volts-2.49

3

21

84

U1:A

LM358N

R610k

R710K

5

67

84

U1:B

LM358N

INPUT SENSOR