Photoelectric control circuit for digital magnetic compass

Details Photoelectric control circuit for digital magnetic compass Photoelectric control circuit for digital magnetic compass

1974-08-08

1976-03-16

Sloyan, Thomas J.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250231SE, G01D 534, G01J 132

Patent

active

039448134

ABSTRACT:
For use in an electro-optically sensed magnetic compass a photoelectric control circuit in which the duty cycle of the illumination source is varied to energize the source only until a valid electrical output signal is detected.

REFERENCES:
patent: 3746842 (1973-07-01), Fowler
IBM Technical Disclosure Bulletin, Thomas et al., "Digital Feedback Light-Emitting Diode Control," 1/1974, Vol, 16, No. 8, pp. 2598-2600.

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