Sparkfun

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US$28.06
This is a 16 character by 2 line display that runs at 3.3V. Utilizes the common ST7066/HD44780 parallel interface. Interface code is widely available for many different controllers and systems. You will need ~11 general I/O pins to interface to this LCD screen. Includes white LED backlight.
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US$28.54
This is a basic 16 character by 2 line display with a snazzy black background with white characters. Utilizes the extremely common HD44780 parallel interface chipset.
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US$20.93
This is a basic 16 character by 2 line display with a Blue background and a Yellow backlight. Utilizes the extremely common HD44780 parallel interface chipset.
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US$2.73
This is the itty-bitty connector for the Nokia color LCD. 10-Pins. Surface mount. Hard to find. 0.5mm pitch so be careful.
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US$18.61

This USB breadboard power supply kit provides power source from any USB port and outputs a fuse protected and regulated 3.3V. The .1" headers are mounted on the bottom of the PCB for simple insertion into a breadboard. Pins labeled 5V/GND 3.3V/GND plug directly into the power lines.

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US$20.93
This is a very simple board that takes a 6-12V input voltage and outputs a selectable 5V or 3.3V regulated voltage. All headers are 0.1" pitch for simple insertion into a breadboard.
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US$11.99
These are very slim, extremely light weight batteries based on the new Polymer Lithium Ion chemistry. This is the highest energy density currently in production. Each cells outputs a nominal 3.7V at 2000mAh! This battery comes terminated with a standard 2-pin JST-PH connector - 2mm spacing between pins. Do not attempt to charge these with anything but a charger specifically designed for Lithium Ion batteries.
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US$2.73
This is a 3xAA battery holder with removable sliding cover and on/off switch puts a nice finishing touch on your battery powered project. This holder features a removable, sliding cover, which is secured with a small phillips head screw.
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US$1.33

Holds battery in place with friction. The metal housing connects to the positive side of the battery and the PCB pad underneath is connected to the negative side.

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US$4.92

This 9V battery holder allows your battery to snap in tight and holds it in place and has a DC plug output connector. Great for situations where you don't want the battery just hanging. It also has three mounting holes so you can attach it securely to your enclosure.

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US$1.33

PCB mount clip to hold a AA battery. Sold in single units, you'll need two. These work great for small, low power applications that need a battery to run. Low cost and easy to use!

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US$5.53

Simple 4 Cell AA Battery holder with 5" leads with polarized termination, square configuration.

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US$2.10

This 2xAA battery holder with removable sliding cover and on/off switch puts a nice finishing touch on your battery powered project.

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US$2.10

This 2xAA battery holder with a removable sliding cover and On/Off switch puts a nice finishing touch on your battery powered project.

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US$15.88
The LiPo Charger Basic is stripped down of all features and just does one thing well - charge 3.7V LiPo cells at a rate of 500mA per hour. It is designed to charge single-cell Li-Ion or Li-Polymer batteries.
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US$14.58
It is designed to charge single-cell Li-Ion or Li-Polymer batteries. The board incorporates a charging circuit, status LED, connector for your battery (JST-type used in the batteries we carry), and a mini-USB connector.
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US$4.82
This is a massive single pole - double throw (SPDT) sealed relay. This means that when current is applied to the coil it throws a simple changeover switch, terminating the connection from the NC contact to ground and closing the NO contact. Use them to switch high voltage/high current devices.
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US$51.73
This is designed to allow you to safely control an outlet device without exposing any 120VAC voltages. You can plug in any standard 120VAC 3-prong outlet to be controlled by most any microcontroller. This will work great with Arduino!
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US$7.87

This smaller solenoid is designed to work directly with 5V which makes it a great match for embedded projects.

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US$3.00

This is a carbon fiber safety cover protects a toggle switch from accidentally being turned on.

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US$5.88

This is a package of ten 6 inch single female to female jumper wire set good for prototyping wire connection. These are 155mm long jumpers with female connectors on both ends.

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US$5.88

This is a package of ten 6 inch single male to male jumper wire set good for prototyping wire connection. These are 155mm long jumpers with male connectors on both ends.

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US$1.06
This is a 6 pin stackable header with extra long pins. Pins are spaced by 0.1".
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US$1.06
This is a 8 pin stackable header with extra long pins. Pins are spaced by 0.1".
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US$2.41
This is a kit of four headers, two of 6 pin headers and two of the 8 pin headers. Pins are spaced by 0.1".
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US$1.33
This DC power jack/connector is just like the other one that we carry except that it's terminated with breadboard-friendly pins instead of wide solder terminals. These are also compatible with our DC wall supplies and have a 5mm jack, with a 2.1mm center pole diameter.
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US$1.33

This 0.5W, 8Ohm speaker is only 40mm in diameter and just over 4mm thick. If you want to get some sound out of your project but have a tight space budget, this is a good way to do it.

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US$53.13
Everything you need to get started with 28 pin PICAXE microcontrollers! Kit Includes: PICAXE 28X1 IC. PCB and Parts. Interface cables. Battery Holder. Software CD.
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US$5.53
This encoder is especially cool because it has a common anode RGB LED built in, as well as a push-button.
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US$6.29
This encoder is especially cool because it has a common anode RGB LED built in, as well as a push-button.
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US$41.93

This large matrix has 64 Red, 64 Green and 64 Blue individual LEDs built into one common cathode housing. Unit comes with a black finish and a opaque LED lenses.

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US$5.11
It has a common anode. The display features one decimal point per digit, and individually controllable apostrophe and colon points.
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US$3.38
It has a common anode. The display features one decimal point per digit, and individually controllable apostrophe and colon points.
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US$3.38
It has a common anode. The display features one decimal point per digit, and individually controllable apostrophe and colon points.
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US$3.15
This is a basic, 4-digit 7-segment display - yellow in color. It has a common anode. The display features one decimal point per digit, and individually controllable apostrophe and colon points. The LEDs have a forward voltage of 2.1VDC and a max forward current of 20mA. The hardware interface is sixteen (two rows of eight) through-hole pins.
Delivery within 2-3 weeks
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US$2.73
It has a common anode. Two decimal points, but only the one on the right is wired.
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US$1.74
It has a common anode. Two decimal points, but only the one on the right is wired.
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US$28.64

Dimensions: Overall Display: 127 x 101.6 mm (5.00" x 4.00"). Digit Height: 153mm (6.02"). 

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US$9.73

This medium matrix has 64 Red/Green LEDs built into one common cathode housing. Unit comes with a black finish and a opaque LED lenses.

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US$6.93

This small matrix has both bright-red and bright-green LEDs built into one common cathode housing.

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US$4.92
This is a 8 pin dip programmed flash microcontroller chip. PICAXE is a neat entry-level microcontroller system that is relatively cheap to get started with. The chip is programmed with a simple serial connection and the BASIC development environment is free! 
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US$9.73
This is a 20 pin dip programmed flash miconcontroller chip. PICAXE is a neat entry-level microcontroller system that is relatively cheap to get started with. The chip is programmed with a simple serial connection and the BASIC development environment is free!
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US$18.13
This is a 28 pin dip programmed flash microcontroller chip. PICAXE is a neat entry-level microcontroller system that is relatively cheap to get started with. The chip is programmed with a simple serial connection and the BASIC development environment is free!
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US$15.33
This is a 28 pin dip programmed flash microcontroller chip. PICAXE-28X1 microcontroller chip. Enhanced PICAXE28 chips with 8x memory and many additional features such as i2c bus support.
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US$11.13
This is a 14 pin LGA package low power triple axis accelerometer. The sensor has a g-Select input which allows for the selection between two measuring ranges - ±1.5g or ±6g.
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US$2.10
This is a SOT-223 package 0.8A Adjustable voltage regulator capable of outputting 1.2V to 18V. The LM1117 uses the same pin-out and setup as the popular LM317 adjustable regulator, contained in a handy surface mount package. Requires two external resistors to function.
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US$3.15
These units have four pads with a common anode configuration. Use this one LED for three status indicators or pulse width modulate all three and get mixed colors!
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US$1.39
They're great when you need a lot of color from not a lot of board space. Features: Viewing angle: 120 degrees. Red: (640nm) @ 250mcd. Green: (525nm) @ 880mcd. Blue: (470nm) @ 180mcd.
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US$6.93
These LEDs provide optimized light quality and efficiency to address a number of project needs, including LED illumination.
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US$6.93
These LEDs can be blindingly bright and have a max forward current of 1A! This LED has a typical forward voltage of 3VDC (2.55V to 3.99V range).
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US$25.13
These lights are extremely bright, with supply currents between 350mA and 700mA. The board can therefore dissipate close to 6.5W. A heatsink is recommended.
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US$27.93
These lights are extremely bright, with supply currents between 350mA and 700mA. The board can therefore dissipate close to 6.5W. A heatsink is recommended.
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US$16.73
With a large red button, easy mounting, and a long detachable ignition cable, this would be a perfect fit for your next spud cannon, rocket launcher, or flamethrower. The igniter itself is about 3.5" long, with a 0.65" diameter barrel (for mounting). The cable is just over 2 feet in length.
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US$6.85

This is a 12-step rotary encoder with a nice 'clicking' feel. It's breadboard friendly, and has a pretty handy select switch (by pushing in on the knob). The encoder is different from a potentiometer in that an encoder has full rotation without limits. 

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US$3.95
This small key switch is ideal for projects that require a secure power ON/OFF function. With only 14.5mm diameter front bezel it does not take up much space on your panel. On/Off positions are clearly marked with a green dot for ON and red dot for OFF. Locking action is very positive with a push and rotate requirement to move positions. The switch is perfect for small professional looking projects.
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US$53.13
This 200 pulse per rotation single-output encoder outputs electrical pulses which you can interpret using a microcontroller to find the position of the input shaft. This allows you to add feedback to motor control systems. Encoders of this kind are often used in balancing robots and dead reckoning navigation.
Delivery within 2-3 weeks
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US$2.73

This is a small 12mm round speaker that operates around the audible 2kHz range. You can use these speakers to create simple music or user interfaces.

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US$1.39
This plastic knob accepts a 6mm shaft and has a 15mm outer diameter. They simple press-fit onto a shaft. These are clear so that they can be used with our illuminated potentiometer.
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US$20.93
This EL panel is a flexible plastic sheet which contains a phosphor layer and lights up with a neon-like glow when the proper voltage is applied.
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US$13.93
This EL tape is a flexible plastic ribbon which contains a phosphor layer and lights up with a neon-like glow when the proper voltage is applied. It's a lot like the ever-popular EL wire except, well, it's a ribbon.
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US$13.93
This EL tape is a flexible plastic ribbon which contains a phosphor layer and lights up with a neon-like glow when the proper voltage is applied. It's a lot like the ever-popular EL wire except, well, it's a ribbon.
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US$14.95
This EL tape is a flexible plastic ribbon which contains a phosphor layer and lights up with a neon-like glow when the proper voltage is applied.
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US$13.93
This is a 10 foot EL wire in length with a 2.3mm in diameter that glows fluorescent green and is terminated with a JST PH connector.
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US$13.93
This is a 10 foot EL wire in length with a 2.3mm in diameter that glows purple and is terminated with a JST PH connector.
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