Game roller or chase circuit


Posted on Feb 7, 2014

The 555 timer produces a rapid series of pulses whenever switch SI is open. These pulses are counted in groups of 16 and converted into binary form by the 7493 and applied to the 74154 (a l-of-16 decoder/demultiplexer) 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 onOnly one current limiting resistor (R3) is used for all the LED``s since only one is on at any one time


Game roller or chase circuit
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