GAME_ROLLER_OR_CHASE_CIRCUIT

Published:2009/7/1 4:34:00 Author:May | From:SeekIC

Circuit NotesThe 555 timer produces a rapid series of pulses whenever switch S1 is open. These pulses are counted in groups of 16 and con-verted into binary form by the 7493 and applied to the 74154 (a 1-of-16 decoder/demultiple xer) wired so that each of its 16 output lines goes low sequentially and in step with the binary count delivered by the 7493. When the switch is closed, only one LED remains on. 0nly one current limiting resistor (R3) is used for all the LED's since only one is on at any one time.



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