NMEA to RS232 Interface Board

NMEA to RS232 Interface Board
by
Harry Whitfield

This design is based on that of Andrew Bruno. His design appeared under the name of "bruno-if". My contribution has been to provide Postscript files for a Printed Circuit Board.

Circuit Diagram

ICs:

MAX232CPE       RS232/TTL Interface
CD4049UBE       Hex Inverting Buffer
L7805C          5 Volt regulator

Capacitors:

C1,C2,C3,C4,C5  22 microfarad  (electrolytic - 16 volt working)
C6              10 microfarad  (electrolytic - 16 volt working)
C7              100 microfarad (electrolytic - 16 volt working for 12 volts in)
                               (electrolytic - 50 volt working for 40 volts in)
Resistors:

R1,R2           4K7 ohm

Diode:

D1              1N4002 Power Diode

Postscript Files

Two Postscript files are provided. They can be printed directly or used as EPS files. When used as EPS files, they should not be subject to any further scaling.

NMEAx1.eps contains both the pcb design (copper side) and an overlay design, both at full scale.

NMEAx2.eps contains both the pcb design (copper side) and an overlay design, both at twice full scale.

Permission is hereby granted for non-commercial use.

You use the designs entirely at your own risk.

Harry.Whitfield@ncl.ac.uk