Multi-purpose GPS Receiver
For those who are keen to know everything!
Published in issue 382, October 2008
Although satnav systems have been in our cars for some years now, it’s only recently that stand-alone GPSs have appeared aimed at the amateur market. Despite their small size and often very affordable prices, they have nothing to envy their predecessors, and if we team them up with suitable electronics, they can perform our positioning or navigation tasks just as accurately as the manufactured products.
GPS/PC Adaptor
Capacitors
C1 = 470µF 25 V radial
C2 = 220nF MKT
C3 = 10µF 25 V radial
C4-C9 = 100nF ceramic
Semiconductors
D1 = 1N4004
IC1 = 78L05
IC2 = GPS receiver type EM-406A (see text)
IC3 = MAX242 (Maxim IC)
Miscellaneous
K1 = PCB mount DC adaptor socket
K2 = 6-way SIL pinheader
K3 = 9-way sub-D socket (female), PCB mount
K4 = connector type SM06B-SRSS-RB (Digikey)
K5 = 4-way SIL pinheader
JP1 = 3-way SIL pinheader with jumper
PCB copper track layout, free download # 070309-1 from www.elektor.com
Comprehensive Autonomous GPS Receiver
Resistors (0.25W / 5%)
R1 = 100Ohm
R2-R5 = 10kOhm
R6 = 220Ohm
R7 = 0Ohm*
Capacitors
C1 = 100µF 25V radial
C2 = 47µF 25V radial
C3 = 10nF ceramic
C4,C5 = 22pF ceramic
Semiconductors
LCD1 = alphanumeric LCD, 4 lines of 20 characters
IC1 = LT1300
IC2 = PIC18F2520, programmed, Elektor SHOP # 080309-41
IC3 = 74LS04
D1 = 1N5817 (must be Schottky)
D2 = 5.1V or 5.6V 400 mW zener diode
Miscellaneous
L1 = 22 µH, Panasonic type ELC08D (e.g. RS Components)
Qz1 = 20MHz quartz crystal
P1 = 10kOhm preset H
K1-K4 = 2-way SIL pinheader
K5 = DC adaptor socket
K6 = 4-way SIL pinheader
K7 = connector type SM06B-SRSS-TB(LF)(SN) (Digikey)
Type EM-406A GPS receiver (see text)
PCB copper track layout, free download # 070309-2 from www.elektor.com
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Click below to download a PDF copy of this article from Elektor magazine. Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.
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