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Q&A Summing op-amp 10 meters long

Yes, that should work. Each sensor is then dumping a current related to its measurement onto a single common wire. Basically, the sensor outputs are summed because currents add. 10 m shouldn't b...

posted 8d ago by Olin Lathrop‭

Answer
#1: Initial revision by user avatar Olin Lathrop‭ · 2024-12-09T21:17:23Z (8 days ago)
Yes, that should work.  Each sensor is then dumping a current related to its measurement onto a single common wire.  Basically, the sensor outputs are summed because currents add.

10 m shouldn't be an issue for 1 kHz.  The harder problem is avoiding external noise pickup.  Make sure everything is shielded to the extent it can be.