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An optically and electrically, symmetrically triggerable hybrid bistable multivibrator giving both optical and electrical outputs is proposed, designed, and implemented using phototransistors, light emitting diodes, etc. The circuit is found to be working satisfactorily at medium frequency range.doi:10.1109/81.508186 fatcat:qdzcpkpgpncbnjlmb2tehe3g3q