GPS ft. Propeller
Parallax multiprocessor enhances satnav functionality
Materials
Gerber file
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Extra info / Update
Automatic baud rate recognition (4800 or 9600 baud) of the GPS mouse
Designed for GPS mouse models with 3.3 V or 5 V supplies
Graphical presentation of speed values for the last 90 minutes
Speed and direction of movement analogue and digital
Position- and time display (UTC time)
Switchable between metric (m) and imperial (miles/feet) units
Two buttons for selecting image and function within an image
Component list
Resistors
R1,R2,R3 = 10kOhm
R4 = 1kOhm
R5 = 5.6Ohm
P1 = 250kOhm trimpot
P2 = 25kOhm trimpot
Capacitors
C1–C9,C12–C15 = 100nF
C9,C10,C11 = 10µF 16V
Inductor
L1 = 10µH
Semiconductors
D1 = 1N4007
D2 = LED (3mm)
IC1 = P8X32A-D40 (Propeller chip; Parallax)
IC2 = 24LC256-I/P
IC3 = MAX3232CPE+
IC4 = 7805
IC5 = LM2937ET-3.3
Miscellaneous
X1 = 5MHz quartz crystal
LCD1 = graphic LCD 128 x 64, DEM128064
K1,K4 = 2-pin pinheader
K2 = 5-pin pinheader
K3,K5 = 4-pin pinheader
PCB # 090647-1
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