8/16/2019 Prepaid Energy Meter Recharging Section

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XTAL20MHz

C1

33pF

C2

33pF

R11k

5V

R2

330E

D1

LED-RED

SCL6

SDA

5

WC7

E1  2

E2

  3

U4

M24C04

R510k

R610k

5V

EEPROM CARD SECTION

R7

330E

D8

LED-GREEN

R8

330E

D9

LED-YELLOW

RA0/AN02

RA1/AN13

RA2/AN2/VREF-/CVREF4

RA4/T0CKI/C1OUT6

RA5/AN4/SS/C2OUT7

OSC1/CLKIN9

OSC2/CLKOUT10

RC1/T1OSI/CCP2  12

RC2/CCP1  13

RC3/SCK/SCL  14

RB7/PGD  28

RB6/PGC  27

RB5  26

RB4  25

RB3/PGM  24

RB2  23

RB1  22

RB0/INT  21

RC7/RX/DT  18

RC6/TX/CK  17

RC5/SDO  16

RC4/SDI/SDA  15

RA3/AN3/VREF+5

RC0/T1OSO/T1CKI  11

MCLR/Vpp/THV1

U1

PIC16F873A

SW1

SW-SPST

R9

1k

SW2

SW-SPST

R10

1k

5V

SW3

SW-SPST

R12

1k

5V

5V