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ContinuousWave: Small Boat Electrical
Garmin 178 Alarm tone volume adjustment
|Author||Topic: Garmin 178 Alarm tone volume adjustment|
posted 05-28-2007 05:37 PM ET (US)
I am trying to adjust the volume of the anchor drag alarm volume or the "off course" alarm volume. it is too quiet when I am under way and the engine is running. Any ideas?
posted 05-28-2007 09:49 PM ET (US)
Bob, The unused yellow wire in the harness at the rear connector on the Garmin 178 is the negative conductor of the alarm output. The load is restricted to 100 milliamps. That is not suitable to be connected to a high current horn directly. I would go to an electronics supplier and ask for a 12 volt direct current piezo horn that draws less then the 100 ma rating of the Garmin 178.
As I said, connect the yellow wire of the Garmin to the negative side of the horn and the positive side of the horn to the 12 volt (red) positive wire of the Garmin itself.
posted 05-28-2007 10:19 PM ET (US)
OR, wire the GPS to a relay, and have the relay trigger the
ALARM, loud enough to wake the dead (or the
posted 05-28-2007 10:28 PM ET (US)
This is true!
Three Buck Chuck on the East coast. Still another reason to move!
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