Hi Ralph, the diagram that you posted was very helpful. Thank you.
Do you know what type of alarm signal the Garmin 178C outputs through the yellow lead? Assuming it is electrical as opposed to digital. My manual is on the boat and am working on a relay solution, but need to know the output. Is it the 100mA that you reference?
Do you know what type of alarm signal the Garmin 178C outputs through the yellow lead? Assuming it is electrical as opposed to digital. My manual is on the boat and am working on a relay solution, but need to know the output. Is it the 100mA that you reference?
Your Garmin 178C is similar to my Garmin GPSMAP 2006 in that they both have a takeoff for a 100 mA load to power an alarm. This allows you to insert a relay with a small coil (about10-20 mA) and then the sky's the limit for loading.