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[aprssig] Aisin GPS

KA8VIT ka8vit at ka8vit.com
Wed Feb 27 00:38:29 UTC 2008

Hey Ben,

I am not sure what you mean by...  "lost their way and default back to 

Sounds to me like your backup battery has died.

I bought 20 of the Aisin GPS boards back in 1998.

I still have 10 of them untouched.

I gave a couple away....   experimented with a couple...  and
a couple others went up in balloons.

I removed the actual GPS engines from the boards they were
on and also took the backup battery, power and antenna
connectors and heatsink from the original boards and mounted
them all on some perf board.
(see link)


I then wrote some 8051 code to convert the Aisin binary output into
a couple different NMEA GPS strings.
(see links)



The backup battery is the red thing in the two pictures below
(see links).




73 - Bill KA8VIT

Ben Lindner wrote:
> Hi Folks,
> I have 2 Aisin GPS (just engines ) that have lost their way and 
> defaulted back to Japan. They have served me well since 2000.
> Does anyone know of a fix for the problem or any hints so I can get 
> them back on track
> cheers
> Ben Lindner


Bill Chaikin, KA8VIT
USS COD Amateur Radio Club - W8COD
WW2 Submarine USS COD SS-224 (NECO)

ka8vit at ka8vit.com

QRP-L#: 2596
FP#:    1043
SKCC#:  2593

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