Electromechanical

US$2.53
This 1.5" diameter speaker cone is the perfect addition to any audio project where you need an 8Ω impedance and are using 0.25W or less of power. We particularly like this cone as it's very simple and its plastic body is extremely lightweight and thin.
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US$2.88
This tiny 1" diameter speaker cone is the perfect addition to any small audio project where you need an 8 Ω impedance and will be using 0.5W or less of power. We particularly like this cone as it's very simple and its metal body is extremely lightweight.
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US$1.36

Dimensions: 20mm x 5mm. Rated: 250V (note: indicate or not indicated on the fuse.). Prepackaged: Order fuses in increments of 5 pcs.

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US$1.39
Miniature normally open switch with 15.24mm x 2.66mm (0.600” x 0.105”) glass envelope. Specifications: Type: Glass Body. Circuit: SPST-NO. Switching Current DC Max: 1A. Switching Voltage DC Max: 200V. Switching Power Max: 10W. Termination Style: Axial 2 Leads.
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US$1.39
Specs: Type: Glass Body. Circuit: SPST-NO. Switching Current DC Max: 500mA. Switching Voltage DC Max: 200V. Switching Power Max: 10W. Termination Style: Axial 2 Leads.
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US$2.73
Knife switches for low voltage experiments (less than 36V) with plastic bases. 
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US$1.27
Knife switches for low voltage experiments (less than 36V) with plastic bases. 
Delivery within 2-3 weeks
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US$2.69
Operates on 1.5V or 3V DC. Speed: 7000-11000 RPM. Motor is 40 MM long x 20Mm in diameter. Shaft size: 2 MM diameter x 8 MM long.
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US$0.80
CM7912 Ceramic Magnet, Disc, 25mm Dia., 6mm Thick We offer a variety of economical ceramic bar, disc, and ring shaped magnets.  Magnets are unpainted,...
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US$4.26
CM7907-PK/2 Ceramic Magnet, Pack of 2, 38 x 8mm Rings, 1 Red, 1 Blue We offer a variety of economical ceramic bar, disc, and ring shaped magnets....
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US$4.42
This high-power, 130-size brushed DC motor can be used as a direct replacement for lower-power 130-size motors to get more torque and speed out of your gearmotor, but it will also draw more current and typically wear out faster.
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US$12.57
35-3429 Switch Push Button ON (OFF) SPST Plunger 15A 250VAC Momentary Contact Screw Panel Mount Supplier: GC Electronics Part No:...
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US$23.45
This high power 4" diameter speaker will amp up any audio project where you need loud sound! It is 4 ohm impedance, rated for 20W continuous power. (This thing is really loud) It also has four handy mounting tabs 3 inches apart, and a grill that fits on top. The grill is to protect the cones, and is not necessary for use. 
Delivery within 2-3 weeks
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US$2.03
This large (30mm diameter) piezo element is nicely enclosed with mounting holes so you can attach easily. Piezo elements convert vibration to voltage or voltage to vibration. 
Delivery within 2-3 weeks
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US$0.81

Dimensions: 1.25" x .25" (30mm x 6mm). Rated: 250V (note: indicate or not indicated on the fuse.). Equivalent to Littlefuse 314 Series. Prepackaged: Order fuses in increments of 5 pcs.

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