PLOP_FOR_GAMES

Published:2009/7/7 21:15:00 Author:May | From:SeekIC

Section 1 of 7406 TTL hex inverter can be attached to output port and driven by program loop, to provide sound effects for computer games. When output port goes to logic1 (greater than +2 V). action of inverter is such that paralleled inverters 3 and 4 go to 0 and draw current through primary of T1, making loudspeaker produce single plopping sound.When outputport goes to 0, another plop is produced. If output port is switched between 0 and 1 fast enough, loudspeaker output will be tone at switching frequency.-D. Parks, Adding Plop to Your System, Kilobaud, May 1977, p 98.



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