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NEW VERSION! This is the upgraded DFRduino Mega 2560 V3.0 which is now fully compatible with Arduino Mega 2560 R3. The Arduino Mega is a microcontr...

"You see, wire telegraph is a kind of a very, very long cat.  You pull his tail in New York and his head is meowing in Los Angeles.  Do you unde...

5ft spool - Used along with the solder sucker to clean up soldering messes. Wick really comes in handy when soldering or desoldering surface-mount ...

75 flexible stranded core wires with stiff ends molded on in red, orange, yellow, green, blue, brown, black and white. These are a major improvemen...

This board is a unique board recommended by a SparkFun customer. When playing with SD, you sometimes need to view what the SPI traffic is doing, wh...

Not just a simple breakout board, this microSD adapter goes the extra mile - designed for ease of use. Onboard 5v->3v regulator provides 150mA f...

Perfect for bread-boarding, free wiring, etc. This spool of solid-core wire is easy to solder to. When bent it keeps its shape pretty well. We like...

If you need to connect a battery pack or wired power supply to a board that has a DC jack - this adapter will come in very handy! There is a 2.1mm ...

Infrared LEDs are used for remote controls (they're the little LED in the part you point at your TV) and 'night-vision' cameras, and these li...

Resistors are a good thing, in fact, they’re actually crucial in a lot of circuit designs. The only problem seems to be that resistors disappear...

This or that, one or the other, perhaps or perhaps not! So hard to make decisions these days without feeling like you're just going back and for...

Ever hear of a thing called RGB? Red, Green, Blue? How about an RGB LED? These 5mm units have four pins: one for each color and a common anode. Use...

Sometimes when you have too many choices, it’s hard to make a good decision. In fact, there are times when you just want a bag of LEDs, just one of...

This is an incredibly simple two cell 18650 Battery Holder. When someone thinks of 18650 Cells they tend to think of flashlights first, which is fa...

INTRODUCTION If you are familiar with our product, you will find there is waterproof temperature sensor named DS18B20...

Add some crisp and compact audio to your project with this Mini External USB 2.0 Speaker. It's USB-only and does not require or use a 3.5mm audi...

This adapter allows you to connect a barrel jack connector to bare wires. One end has screw terminals and the other has a 5.5x2.1mm, center-positiv...

The AD8232 SparkFun Single Lead Heart Rate Monitor is a cost-effective board used to measure the electrical activity of the heart. This electrical ...

Here at SparkFun, we refuse to leave ‘good enough’ alone. That’s why we’re adding to our line-up of Arduino-compatible microcontrollers once more! ...

Description: This is your tried and true full size solderless breadboard! It has 2 split power buses, 10 columns, and 63 rows - with a total of 830...

With some development boards, low power usage is an afterthought. Especially when price and usability is the main selling point. So what should you...

This basic set contains 10 pieces of each of 14 different lengths. The small transparent plastic case has 5 compartments. The amount of wire is ...

We have no idea what USB device you are hooking up to, but if you want to access the microUSB port on something, you might want this. We broke out ...

These jumper wires come with a twist! Instead of going from 0.1"/2.54mm pitch headers to breadboard or something like that, these are 2.54mm to ...