Power Supply

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  Prototyping

  AA Size Battery Holder for 4 AA batteries 2×2 configuration

  $2.45 $1.45
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  Prototyping

  AA Size Battery Holder for 6 AA batteries 6×1

  $2.25 $1.75
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  Arduino Shields

  LM2596 DC-DC Buck Converter Module Power Supply Output 1.23V-30V

  $4.85 $2.85
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  Power Supply

  AA Size Battery Holder for 3 AA batteries

  $1.35 $0.85
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  Power Supply

  Bread Board Power Supply Adapter Module 5V and 3.1 V dual rail, new

  $1.29 $0.99