5

4

1 D

IN

9v 2

+

10 uF

OUT

1

1

Vdd D

AX.25 Decoder using MX-614

+5v .1 uF

2

BATTERY

2

VREG-5 volt-TO92 3

GND

SW SPST

3

by Mike Berg N0QBH

Vdd

Vdd 10k

.1uF

10k

10k

Vdd .1uF

9 Vbias

5

VDD

Vss

MCLR/RA5 13 12 11 10 9 8 7 6

Vss

10

11

12

13

.1uF

RB7 RB6 RB5 RB4 RB3 RB2/TX RB1/RX RB0/INT

14 10k

4

CLKOUT/RA6 CLKIN/RA7

15 16

RA4/TOCKI RA3/AN3 RA2/Vref RA1/AN1 RA0/AN0

3 2 1 18 17

3.5795 Mhz

39pF

22pF

22pF Vdd

8

RXEQ TX/OUT 7

TXD RXA/OUT

RX/IN 5

M0

CLK/OUT

M1 4

3

2

1

CLK/IN

MX614

6

CLK

14 DET

RXD

Vdd

/RDY

15

C

16

C

PIC16F627

10K

B

B

OPTION SW

100K 1k

5 9 4 8 3 7 2 6 1

RX LED 1

2

100K

100 ohm 74HC14

1 2 A

AUDIO IN

CONNECTOR DB9

Tie unused 74HC14 inverter inputs high and put .1 uF cap across pins 7 & 14

.047 uF

A

Title Size B Date: 5

GPS version data out uses pin #3

4

3

2

PIC 16F627 AX25 DECODER (C) 2006 Document Number Friday, May 05, 2006

Rev P1 Sheet 1

1

of

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