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post #106 of Old 01-03-2010
Cal 9.2 SilverSwan
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Join Date: Jul 2000
Location: East Tennessee
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I had a Raymarine ST 60 system but the old instruments installed were Datamarine from the late 70's. The speed puck transducer for the Raymarine system is a Hall effect with 0-12 volt output. The output from the Datamarine was a low level signal. I contacted Raymarine for assistance and all they could tell me is that their instrument required the 0 to 12 volt signal. I called the DMI repair facility and he was less than cooperative, did not want to give any repair secrets way. The PCB that I had designed and had fabricated did not work at all. I took the datamarine speed display apart and traced the circuit board and tried another version of interface circuit. I used it and modified the circuit and it worked. The custom boards were about $75 and took a week to get, nice service available. I've redesigned the PCB's should I ever need to replace the prototype currently installed.
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File Type: jpg DMI_RAY2.jpg (79.5 KB, 1243 views)
File Type: jpg st60flush.jpg (83.6 KB, 1244 views)

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