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2285-POLOLU 47:1 120RPM Metal Gearmotor 25Dx52L mm with 48 CPR Encoder
US$48.93
This cylindrical, 2.54" x 0.98" x 0.98" brushed DC gearmotor with a 46.85:1 metal gearbox is a lower-current alternative to the HP version. It has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 2249 counts per revolution of the gearbox’s output shaft.
Delivery within 2-3 weeks
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DS-13 SPDT ON-ON Mini Slide Switch
US$0.69
ON-ON. SPDT. 3 pin R/A. 6A@120VAC/28VDC.
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1935-ADA Wired Miniature Electret Microphone
US$1.90
That's one tiny microphone! At about the size of a mature aphid, this wired Electret Microphone is perfect for your FONA. Diameter: 4.4mm. Wire Length: 67mm. Weight: .17g.
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FH503 Fuse Holder
US$1.74
This fuse holder is designed to accept 5x20mm fuses. Use with ABRA GMA and GMD series fuses. Screw mountable with .166” center opening. Connections via 0.187 faston tabs or soldering. Dimensions: 1.5” L x 0.35”W x 0.725” H. 
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PH0780A Economy Horseshoe Magnets 50x12x5mm
US$4.77
Economy chrome steel horseshoe magnet with keepers.
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COM-13013 Mini Microswitch - SPDT (Lever, 2-pack)
US$5.53
This is a 3-terminal microswitch two pack, each equipped with a 17mm lever actuator. These switches have a great ‘clicky’ sound to them with a nice tactile feel and are perfect when used for a slider, 3D printer, or robot project. Each microswitch is rated for 5A at 250VAC.
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SSR-40DA Solid State Relay - 40A (3-32V DC Input)
US$12.53
This particular SSR can switch current loads of up to 40A with a 3-32V DC input. Each one of these relays is equipped with four screw terminals (for use with ring or fork connectors) and a plastic cover that slides over the top of the relay to protect the terminals.
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1649-ADA Multi-Colored Heat Shrink Pack - 3/32" + 1/8" + 3/16" Diameters
US$8.67
Each pack contains ten 6" pieces of the following sizes: 3/32", 1/8", and 3/16".  You get three of each in black and red, and one of each in green, blue, white, and yellow.  It's a nice colorful mixed bag of heat shrink!
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SRUDH-SS-124D1 Relay 24V, 12A, SPDT
US$2.09
SRUDH-SS-124D1 Relay 24V, 12A, SPDT Relay Coil : 24 VDC Contact : 12 A 120 VAC / 12 A 28 VDC S.P.D.T
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1824-ADA 3x4 Phone-style Matrix Keypad
US$13.13
This keypad has 12 buttons, arranged in a telephone-line 3x4 grid. It's made of plastic with sturdy plastic buttons. The keys are connected to a matrix so you only need 7 microcontroller pins (3-columns and 4-rows) to scan through the pad.
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2671-POLOLU Extended Stamped Aluminum L-Bracket Pair for Plastic Gearmotors
2671-POLOLU Extended Stamped Aluminum L-Bracket Pair for Plastic Gearmotors
US$6.82
These light-weight brackets (approximately 2.5 g each) are specifically designed for plastic gearmotors.
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2670-POLOLU Stamped Aluminum L-Bracket Pair for Plastic Gearmotors
2670-POLOLU Stamped Aluminum L-Bracket Pair for Plastic Gearmotors
US$6.78
These brackets are sold in pairs, and each bracket comes with two 1″ long and two 0.75″ long #2-56 screws for securing different size motors. 
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PH0789N8 1.5" Alnico Bar Magnets (pair) with keeper
PH0789N8 1.5" Alnico Bar Magnets (pair) with keeper
US$11.13
1.5" Alnico Bar Magents (Pair) with spacer and keepers. Supplied in cardboard boxes 38 x 11 x 6 mm.
Delivery within 2-3 weeks
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PH0796N8N Ceramic Breakable 2" Magnets, Pack of 10
PH0796N8N Ceramic Breakable 2" Magnets, Pack of 10
US$6.36
Candy bar style breakable magnets. 2" in length.
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PH085C Rectangular Zinc Plated Steel Bar Magnets, 150x10x10mm, Pair with Keepers
PH085C Rectangular Zinc Plated Steel Bar Magnets, 150x10x10mm, Pair with Keepers
US$11.93
Economy steel magnets with keepers. Individually packaged pairs.
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