Rotary encoders can be used similarly to potentiometers. The difference being that an encoder has full rotation without li…

This is a breakout board for our Blackberry Trackball. The four spindles on the trackball have a tiny circular magnet the e…

This is a small 12mm round buzzer that operates around the audible 2kHz range. We drove it directly from a 5V PIC to genera…

Atmel's ATMega328P 8-Bit Processor in 28 pin DIP package. It's like the ATmega168, with double the flash space. 32…

Surface transducers give you the awesome power to turn almost any surface into a speaker. They're essentially just a s…

These DC powered heating pads are perfect for near-body heating applications. They get warm to the touch but not too hot. …

This is a heavy duty SPST toggle switch - your basic on/off toggle. Rated for 2A at 250V or 4A at 125V. Includes a face pl…

Even though the Tron movies have been out for a while, electroluminescence is still the coolest thing since sliced bread. T…

These tactile buttons are great for all sorts of projects. This assortment comes with 2 of each of 6 different colors for …

These color-changing LEDs take the work out of creating crazy, flashy, blinky... ness. Simply apply power and the LED will…

An adjustable potentiometer can open up many interesting user interfaces. Turn the pot and the resistance changes. Connect…

A very powerful 5mW green laser. Fun, but don't point in anyone's eyes. These units include a momentary power butt…

 This is the 24 LED NeoPixel Ring from Adafruit, a small chainable 2.6" (66mm) outer diameter board equipped…

This is the basic laser card module with circuitry built in so that it can be turned on/off with a TTL signal. Includes po…

This is a translucent silicon rubber button pad with 16 buttons originally inspired by the folks at monome.org. Each button…

A solid state relay (SSR) is just what it sounds like; an IC that acts like a mechanical relay. They allow you to control …

PICAXE-08M2 microcontroller chip. PICAXE is a neat entry-level microcontroller system that is relatively cheap to get…

Let there be light(s)! This festive string of addressable RGB LEDs can add color to indoor or outdoor displays. Much like …

The TLC5940 is a 16 channel PWM unit with 12 bit duty cycle control (0 - 4095), 6 bit current limit control (0 - 63), and …

BlinkM is a “Smart LED”, a networkable and programmable full-color RGB LED for hobbyists, industrial designers…

Are you trying to make a quick dime from electronics? Why limit yourself to dimes? This coin acceptor will take up to 6 di…

This MOSFET power control kit is basically a breakout for a RFP30N06LE MOSFET. We give you terminal blocks for connecting …

LinkM is a USB adapter that addresses two of the most frequently-requested BlinkM features. It enables you to program Blin…

 This is the NeoPixel Shield from Adafruit. This Arduino shield is equipped with 40 WS2812 RGB LEDs arranged in an 5x8…

EL wire, or electroluminescent wire, is a flexible wire coated in phosphor. Apply the appropriate voltage and it lights up…

These DC powered heating pads are perfect for near-body heating applications. They get warm to the touch but not too hot. …

 Gone are the days that you have to worry about silicone water proofing splitting and breaking on you! These are seale…

Are you trying to make a quick dime from electronics? Why limit yourself to dimes? This coin acceptor will take three diff…

This 200 pulse per rotation rotary encoder outputs gray code which you can interpret using a microcontroller and find out …

Who doesn't love the soft glow of electroluminescence? This EL panel is a flexible plastic sheet which contains a phos…

These are very bright LEDs. The LEDs are so bright that it hurts to look directly at them. Please take a look at the pictur…

This piezo igniter can be used for all sorts of applications where you need a spark to make fun things happen. With a larg…

The PicoBuck LED Driver is an economical and easy to use driver that will allow you to control and blend three different L…

EL wire, or electroluminescent wire, is a flexible wire coated in phosphor. Apply the appropriate voltage and it lights up…

No really - it's 6 inches (153mm) tall! This very large 7-segment display can be seen from a hundred feet away. So man…

 Gone are the days that you have to worry about silicone weather proofing splitting and breaking on you! These are sea…

A simple slide potentiometer can go a long way. Rated at 10kOhm and 0.5W. Comes with solder tab connections. The taper pro…

This DC Blower really moves some air! Pulling about 1Amp @ 12VDC, this blower is rated at 16CFM (although it seems like mor…

 This is the 16 LED NeoPixel Ring from Adafruit, a small chainable 1.75" (44.5mm) outer diameter board equip…

 This 0.012" Muscle Wire® (aka shape memory Nitinol) is a one foot long piece of nickel-titanium al…

These are very common, high quality BJT NPN transistors made by ST Micro. Datasheet: 2N3904

What is a 'laser card' you ask? It is only the coolest thing to hit Spark Fun Electronics since the Color LCD last …

We all know that you can never get too many LEDs. Don't worry, we've got you covered. This is a mixed pack of 26 LE…

It's not what project you have in mind that may use a rocket launch switch... The question is what project will you co…

 This is the NeoPixel Stick from Adafruit, a small chainable board with eight 5050 WS2812 RGB LEDs. The WS2812s are ea…

This simple on-off switch is rated for 20A at 12V but who cares about all that, it looks way awesome. These toggle switches…

This retail package includes 26 various LEDs, resistors, and a coin cell battery for all your LED projects. They include t…

This is the medium sized LED Matrix with a backpack that has been designed to take SPI serial input and display any graphi…

You can never have too many LEDs. Don't worry, we've got you covered. This is a pack of 100 LEDs. Buy in bulk - sav…

This is a 35mm concave momentary push button similar to the ones you find on arcade games. Simple screw in design. Perfect…