Parts for a distance-sensing auto-tonearm-lift?

Tech Square

Technical and speculative discussion of amps, cables and other topics.

Hey techies!
I'd like to build an autolift for my tonearm, to lift it at the end of a record.
As I envision it, a distance-sensing opto..something will sense the position of the arm, and control a solenoid that lifts the arm when the stylus is in the run-out groove.
What kind of opto-thingy should I look for? It needs to be sensitive to distances in the millimeters-range.

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Topic - Parts for a distance-sensing auto-tonearm-lift? - Ronnie Ericsson 14:47:58 08/24/06 (6)

Optical detectors - Jacques 01:55:22 08/25/06 (5)

Sweet! - Ronnie Ericsson 12:30:19 08/25/06 (4)

Re: Sweet! - Jacques 01:35:50 08/28/06 (3)

Re: Sweet! - Ronnie Ericsson 13:14:58 08/30/06 (2)

Re: Sweet! - Jacques 09:41:19 09/06/06 (1)

Aha! Thanks a lot! (nt) - Ronnie Ericsson 04:54:09 09/09/06 (0)

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