Cursor position controller

摘要: The present system includes an optical reflective sensor, which is hand held and moved over a color density scaled grid, such as gray scale to produce analog signals which, when processed, become the basis for direction of movement screen cursor. are converted into binary coded further hexadecimal signals. Each signal transmitted eight AND gates whose other inputs represent (gray scaled) value position from where sensor could have been moved. Accordingly only one gate will output that be produced if move valid, or acceptable, move. If has validly moved, selected interpreted (circuit-wise) directions compass. used change state bit map memory thus Hence cursor follow sensor. not remain it was prior last user next makes valid again