ABCD 1 2 3 4 5 6 ABCD 1 2 3 4 5 6

PB0(ICP) PB1(OC1A) PB2(SS/OC1B) PB3(MOSI/OC2) PB4(MISO) PB5(SCK)

AGND GND GND

12 13 14 15 16 17

S_WRITE(R) SS MOSI MISO SCK

CHRG_OUT

GND

GND

GND

BAT

BAT

C4

VCC

IN SHDN GND

OUT ADJ BYP

1 2 3

LT1962EMS8 GND

LTC4054ES5-4.2

GND GND

0.1uF C3

JP3-5

C1

JP1-1

SOLAR

1

8

2

VCC

1 X1

R10

X2 GND

B GND

GND

SS VCC MOSI SCK MISO GND

1 2 3 4 5 6 7 8 9 CD WP SW 14

CS DI GND VCC SCK GND1 DO IRQ P9 WP CD SW SHIELD

JP4-2

0.1uF

BAT

C

D

JP4-1

GND

2

3

JP8-1

GND

4

BATTERY

SOLAR

JP6-1

JP6-2

BATTERY GND

T0

3

VBAT

4

R9

U5

C7 0.1uF

JP3-4

10K

JP7 1 2

10K

7

1N5819 D1

JP1-2

D

10uF

8 5 4

JP8-2

GND

SDA

VCC

R3

56K

BAT

PROG

33K

CHRG

R4

5K

CHRG_IN

GND

SQW/OUT

U3

R5

680K U2

SCL

VCC

GND

VCC

2K

R12

R11

C

6 5

CHARGING(Y) CHARGED(G) UVLO(R)

U4

GND

SJ2

470

5 3 21

CHRG_IN CHRG_OUT T0

LED5

B

30 31 32 1 2 9 10 11

LED4

8

PD0(RXD) PB6(XTAL1/TOSC1) PD1(TXD) PD2(INT0) PB7(XTAL2/TOSC2) PD3(INT1) PD4(XCK/T0) PD5(T1) PD6(AIN0) PD7(AIN1)

VCC

VCC

470 R15

7

GND

LED3

GND VCC

GND

VCC

AREF

LED2

20

VCC Y2

32.768KHz

R16 10K

0.1uF C6

Y1

SJ1

10uF

AVCC VCC VCC

A 10K R8

470 R14

C9

PC0(ADC0) PC1(ADC1) PC2(ADC2) PC3(ADC3) PC4(ADC4/SDA) PC5(ADC5/SCL) ADC6 ADC7

R13

18 4 6

PC6(/RESET)

470

RESET

VCC GND

JP2-3

23 24 25 26 27 28 19 22

R17

29

JP2-2

GND

ATMEGA168p

S1

JP2-1

GND VCC

GND

10K

GND

470

AVR_ISP

HUMIDITY

GND

ADD0

VCC

+5 MOSI GND

R6

2 4 6

R7

A

1 3 5

SCK RESET

GREEN LED1

MISO

TMP102

VCC JP5

6

JP3-3

5

SDA

4

SCL

3

JP3-2

2

JP3-1

1

5

6