Forrest Jerome posted:...I also have the Ott Machines sound board for the bridge. It also uses 14v accessory power and is triggered by a momentary 3v signal.
Are you sure about the trigger to the sound board?
Here are the Ott instructions from your earlier thread.
Rather than a "momentary" trigger, I interpret the instructions the 8 sec warning siren followed by the lifting sound requires the continuous application of motor voltage to the Ott trigger input. Apparently when the motor voltage vanishes, the Ott board plays some kind of end-of-travel sound as if the bridge is locking into place or whatever.
While the Ott may trigger on "only" 3V (where did you find this info?), how many volts does the bridge electronics send to motor? The bridge instructions suggests a power source of 12-18V AC. I would think the motor voltage would be much higher than 3V. Is it a DC motor? Is the voltage always of one DC polarity (motor rotates same direction when raising or lowering)?
