2020-06-30, 01:25 PM
(2020-06-30, 01:10 PM)glowntiger Wrote: Do you have the same gnd potential? The input is only a Optocoppler with an 4,7Kohm resistor. Normaly this should not be a issue for the st1...
HAve you try to connect also the gnd to the board?
What kind of ST1 devices are connected? I have try ti with ST60+ (Wind, Depth, Log, Multi) and ST4000+ pilot without any problems....
I have the exact same problem:
Quote:Somehow the Course computer seems to know that there's something fishy going on when I've got MCS connected on the ST1 bus.
If it's not connected, all instruments wake up and work as expected.
As soon as I connect one yellow wire (No Red/Black) from the course computers available ST1 output, the instruments display "Seatalk-Fail"
I tried with only the yellow connected and with yellow and gnd connected. Same issue.
Have soldered up a buffer circuit, but have not had a opportunity to test.
Will revert next week.