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Electromechanical

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SPK-120, 2.50 inch Miniature Speaker 8Ω 13 Watt
US$2.72

This low-cost 2.50 inch speaker is ideal for hobbyists and schools. Miniature Speaker, 13 Watts @ 8 ohms.

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9 High-strength 'rare earth' magnet
9 High-strength 'rare earth' magnet
US$4.73
These things are super powerful. 1/2" diameter, 3/16" thick discs, south side is marked with a red line. Great for use with your SpokePOV Kit. If you have an aluminium frame, use tape/foamstickytape to attach it.
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241 USB game pad with accelerometer project pack
241 USB game pad with accelerometer project pack
US$78.75

Build a custom USB gamepad that has an accelerometer mouse inside! This project pack comes with: SNES controller, Teensy, Accelerometer, 5' mini-B USB cable, 8" of ribbon cable, 2 squares of foam tape. 

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324 Stepper motor - 200 steps/rev, 12V 350mA
324 Stepper motor - 200 steps/rev, 12V 350mA
US$24.50
A stepper motor to satisfy all your robotics needs! This 4-wire bipolar stepper has 1.8° per step for smooth motion and a nice holding torque. The motor was specified to have a max current of 350mA so that it could be driven easily with an Adafruit motor shield for Arduino (or other motor driver) and a wall adapter or lead-acid battery.
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412 Small push-pull solenoid
412 Small push-pull solenoid
US$19.17
This solenoid in particular is fairly small, with a 30mm long body and a 'captive' armature with a return spring. This means that when activated with up to 24VDC, the solenoid moves and then the voltage is removed it springs back to the original position, which is quite handy.
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99-KB-12GP Miniature Audio Transducer
99-KB-12GP Miniature Audio Transducer
US$1.11
Miniature audio transducer PC Mount 8mm x 12mm DC Res.: 45 Ohms Opt. Freq: 2500 Hz.
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RTL-11439 Button Kit Retail
RTL-11439 Button Kit Retail
US$20.93
This collection of common buttons and switches will ensure that you've got the right button for the job. There are 14 switches total of 5 different varieties that we use in projects every day here. Includes: 4 x Panel Mount Momentary Switch. 4 x Simple Pushbutton Switch. 2 x Omron Snap Action Switch. 2 x Round Rocker Switch. 2 x Mini Power Switch.
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996 Brass Liquid Solenoid Valve - 12V - 1/2 NPT
996 Brass Liquid Solenoid Valve - 12V - 1/2 NPT
US$38.50
Control the flow of fluid using the flow of electrons! This liquid valve would make a great addition to your robotic gardening, aquarium, or pool project. There are two 1/2" (Nominal NPT) outlets.
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DFR0008 Input Shield For Arduino
DFR0008 Input Shield For Arduino
US$23.73
The upgraded Arduino Input Shield includes a two axis mini joystick (with moment switch) as well as four colored push buttons(Red,Yellow,Blue,Green).
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DFR0061 Joystick Module
DFR0061 Gravity: Joystick Module V2
US$15.33
Lots of robot projects need joystick. This updated joystick module V2 provides an affordable solution.  Simply connect  to two analog inputs, the robot is at your commands with X,Y control. It also has a switch that is connected to a digital pin.  This joystick module can be easily connect to Arduino by our IO Expansion Shield (DFR0265) with supplied cables.
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COM-10442 LED Tactile Button - Red
COM-10442 LED Tactile Button - Red
US$4.35
This is a simple LED-illuminated tactile button with a red cap. It's just like a basic tactile button, but it lights up red! So now you can get visual feedback, or light up your project. These have a 12mm body and are rated for 50mA.
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COM-09506 Microswitch - 3-terminal
COM-09506 Microswitch - 3-terminal
US$3.07
This is a 3-terminal microswitch, with a small push-button. This switch has a great 'clicky' sound to it, and a nice tactile feel.
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COM-09190 Momentary Push Button Switch - 12mm Square
COM-09190 Momentary Push Button Switch - 12mm Square
US$0.99
This is a standard 12mm square momentary button. What we really like is the large button head and good tactile feel (it 'clicks' really well). This button is great for user input on a PCB or a good, big reset button on a breadboard. Breadboard friendly!
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COM-00102 SPDT Mini Power Switch
COM-00102 SPDT Mini Power Switch
US$1.78
Simple SPDT Switch. Rated at 30V/200mA. The pins have .1" spacing - fits great into a breadboard! Use it as a power switch or general control switch.
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COM-09609 SPDT Slide Switch
COM-09609 SPDT Slide Switch
US$1.47
This is a simple SPDT slide switch - great for use as an ON/OFF button, or just as a general control switch. The pins are spaced by 0.1", so it's breadboard friendly. The switch is rated for 0.3A at 50VDC.
Delivery within 2-3 weeks
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