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Digital circuitry causes 10 LEDs to light sequentially back and forth and emits a "click" at the end of each "swing". Watch the interesting effect as the lights sequence rapidly through the middle and slow down at the ends just like a mechanical metronome.
Components: 5 resistors, potentiometer, 5 capacitors, 4 diodes, 10 LEDs, 2 transistors, 5 ICs, speaker, battery snap, slide switch
Principles taught: digital logic, counters, multiplexers |