5) USB A to B cable $4. - This will be used to upload your Arduino LED code to the Arduino Uno board. 6) Wire cutter/stripper $5. 7) Parallax Sound Impact Sensor $10. 8) Wall Adapter Power Supply - 9VDC 650mA $6. Total cost will be a bout $80 but keep in mind, all of these components are completely reusable.
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