16 stage bi directional led sequencer

The bi-directional sequencer uses a 4 bit binary up/down counter (CD4516) and two ``1 of 8 line decoders`` (74HC138 or 74HCT138) to generate the popular ``Night Rider`` display. A Schmitt Trigger oscillator provides the clock signal for the counter and the rate can be adjusted with the 500K pot..

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