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NameReference numberQuantityPrice eachURL
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McMaster parts
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Battery holder, 4 AA batteries7712K1412.09https://www.mcmaster.com/#7712k14/=1e3i8ez
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Oild embedded bronze bearing, 4mm6659K65121.75https://www.mcmaster.com/#6659k65/=1e3ia34
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18-8 Stainless Steel Socket Head Screw, M4 x 0.7 mm Thread, 30 mm Long91292A1306https://www.mcmaster.com/#91292a130/=1da79xj
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Passivated 18-8 Stainless Steel Pan Head Phillips Screws
M4 x 0.7mm Thread, 16mm Long		92000A22612https://www.mcmaster.com/#92000a226/=1e3icd2
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M4 hex nuts90591A25512https://www.mcmaster.com/#90591a255/=1e3idfp
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M4 lock nuts90576A1036https://www.mcmaster.com/#90576a103/=1dcwn8q
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M2 socket head screws, 10mm 91292A83324https://www.mcmaster.com/#91292a833/=1e3ikwx
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M2 hex nuts90591A26524https://www.mcmaster.com/#90591a265/=1e3ilau
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Pololu Parts
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Parallax Feedback 360° High Speed Servo627.99https://www.parallax.com/product/900-00360
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Pololu Wixel120.95https://www.pololu.com/product/1336
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Pololu Maestro Micro119.95https://www.pololu.com/product/1350
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Digi-key parts
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2K Ohm through-hole resistor CF14JT2K00CT-ND1https://www.digikey.com/product-detail/en/CF14JT2K00/CF14JT2K00CT-ND/1830357/?itemSeq=266149635
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1K Ohm through-hole resistor‎CF14JT1K00CT-ND‎1https://www.digikey.com/product-detail/en/CF14JT1K00/CF14JT1K00CT-ND/1830350/?itemSeq=266154959
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4.7K Ohm through hole resistorCF14JT4K70CT-ND‎6https://www.digikey.com/product-detail/en/CF14JT4K70/CF14JT4K70CT-ND/1830366/?itemSeq=266154754
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2.2 uf capacitor493-5369-1-ND‎6https://www.digikey.com/product-detail/en/UPS1H2R2MDD1TD/493-5369-1-ND/3129706/?itemSeq=268941167
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Other
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Foam board1
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0.25" ABS board1
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PCB board / prototype board1https://www.digikey.com/en/products/detail/pololu-corporation/4000/11586861
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Updated 9/20/2021
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Servo horn: 25T, 14mm mounting hole distance6https://www.amazon.com/gp/product/B07D56FVK5/
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Note: Such parts are also made by other manufacturers, but their dimensions may vary slightly. Please double check before purchasing.
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