4,133 results for 7.4V

Products 1545 found

Polymer Lithium Ion Battery - 2200mAh 7.4v

$ 15.95
Polymer Lithium Ion Battery - 1000mAh 7.4v

$ 9.95
7-Segment Display - 4-Digit (Blue)

$ 2.5
7-Segment Display - 4-Digit (Red)

$ 1.95
7-Segment Display - 4-Digit (White)

$ 1.95
Rotary Potentiometer - 4.7k Ohm, Linear

$ 0.95
7-Segment Display - 4-Digit (Yellow)

$ 1.95
7-Segment Display - 4-Digit (Kelly Green)

$ 1.95
Shaft - Solid (Stainless; 1/4"D x 7"L)

$ 2.39

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Retired Products









8 Retired



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Tutorials 370 found

Hacking the MiP - Proto Back

December 4, 2014

How to attach the Proto Back and begin Hacking the MiP

Battery Technologies

February 6, 2013

The basics behind the batteries used in portable electronic devices: LiPo, NiMH, coin cells, and alkaline.

LiPo USB Charger Hookup Guide

May 1, 2014

How to charge your LiPo batteries with the USB LiPo charger. Plus how to modify your charger to set the charge current.

Ardumoto Shield Kit Hookup Guide

July 2, 2015

Learn how to assemble and drive DC motors using the Ardumoto Shield.

Shift Registers

August 23, 2013

An introduction to shift registers and potential uses.

Simon Tilts Assembly Guide

December 3, 2013

This tutorial will guide you through assembling your Simon Tilts PTH Kit.

Using EAGLE: Schematic

September 5, 2013

How to design a PCB in EAGLE using through-hole parts.

Designing PCBs: Advanced SMD

December 10, 2012

Advanced Eagle layout for PCBs with SMD devices.

How to Install and Setup EAGLE

September 5, 2013

Not just how to download and install EAGLE, but how to install the SparkFun EAGLE Libraries and scripts.

Using the Arduino Pro Mini 3.3V

September 5, 2013

This tutorial is your guide to all things Arduino Pro Mini. It explains what it is, what it's not, and how to get started using it.

XBee WiFi Hookup Guide

November 21, 2013

An overview of Digi's WiFi XBees, and a quick how-to on getting them connected and interfacing with the cloud.


April 1, 2013

A tutorial on all things resistors. What is a resistor, how do they behave in parallel/series, decoding the resistor color codes, and resistor applications.

Constant Innovation in Quality Control

December 11, 2013

In this article, we share our recent advancements in quality control. Every new product we design and manufacture here at SparkFun gets a custom testing apparatus that is designed and built in house. Along with making our tests more thorough, we have also made them more efficient and robust.

Integrated Circuits

July 15, 2013

An introduction to integrated circuits (ICs). Electronics' ubiquitous black chips. Includes a focus on the variety of IC packages.

Assembly Guide for RedBot with Shadow Chassis

May 28, 2015

Assembly Guide for the RedBot Kit. This tutorial includes extra parts to follow to go along with the RedBot Inventor's Kit tutorial.


February 7, 2013

Light is a useful tool for the electrical engineer. Understanding how light relates to electronics is a fundamental skill for many projects.

Arduino Shields

August 6, 2013

All things Arduino Shields. What they are and how to assemble them.

Bubble Display Hookup Guide

March 7, 2014

Need a small, cheap, and easy display? These bubble displays are what you've been looking for. Learn how to use them in this hookup guide.

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Archived Tutorials 12 found

HAB - Sensor System, Flight Computer, and Radio System

A break down of all the sensors chosen, the main PCB layout, and the high power radios and antennas used.

Robot Journal - John

Building a jousting bot

Robot Journal - Tim

Building a jousting bot

Robot Journal - Pamela

Building a jousting bot

Robot Journal - Toni

Building a jousting bot

Wii-mote guts

We crack the case on the infamous flying Nintendo controller, so you don't have to.


We take an old rotary phone, dissect it, and cross-pollinate it with a cellular module.

Basic breadboard tutorial

Using the PIC-PG1B programmer - An amazing low-cost programmer that impressed us the first time we used it! A great tutorial to get your first PIC project blinking.

LED Laden Bike Helmet

Curious about how to integrate LEDs into your project? Check this out - I was tired of forgetting my bike light at home, this tutorial dives into LED wiring basics while adding lighting to my bike helmet.

Mixed Signal Costume

She's always sending me mixed signals. Checkout this twist on a stoplight costume using MOSFETs, XBee, and plenty of blinking LEDs.

Beginner Parts Kit

A introduction to all of the parts included in the Beginner Parts Kit. Also included are a few quick circuits to quickly make something with your new toys.

Sizing a heat sink for a heavy load

Keeping the smoke in when the power dissipation on a component climbs into the 10W+ range

Blog 508 found

The New UAV Development Board v4 (UDB4) and Dizzy Gyros

October 20, 2011 9

The new UDB4 is smaller and more powerful than before. See how the developers refined the system using very interesting testing techniques.

Another Box Full of New Products!

June 17, 2011 90

We have another week full of new products for you this Friday, as well as a new studio design.

Friday Celebration of New Products!

June 10, 2011 59

Check out our selection of new products for this week.

Engineer Thursday - Bring on the Lasers!

June 20, 2013 13

Open-sourcing Laser Technology and the SparkFun visit the Optics Lab at the School of Mines

Engineer Thursday - Using the Wake on Shake

April 25, 2013 16

Check out these projects using the Wake on Shake board!

Enginursday: The Spark Arts

September 26, 2013 7

Exploring the SpookFun catalog for some fun Halloween hacks!

January Caption Contest Winner!

January 23, 2014 5

Congrats Member #468914, you're the proud owner of the Kits Kit!

This way to the Champlain Mini Maker Faire

October 7, 2013 1

SparkFun Education visits Shelburne, Vermont for the second annual Champlain Mini Maker Faire.

AVC Reminder

March 26, 2013 11

Don't forget to sign up for the SparkFun AVC!

The First-Ever Complete Teardown of Google Glass

June 11, 2013 21

Check out Star Simpson and Scott Torborg's teardown of the Google Glass!

Where did all that rain come from?!

October 16, 2013 11

Why the rain and what happened to the Boulderites.

Guest Post: FIRST Robotics and the ChapR Team

January 21, 2015 1

A story about a FIRST team doing big things for the robotics community.

Midwest Tour and Win a Free RedBoard!

September 17, 2013 50

Where in SparkFun employees do flips in order to illustrate "if" statements and explain alternative electricity analogies.

Tips for a Better E-Textiles Workshop

January 10, 2014 1

Here are a few tips for creating your e-textiles workshop and activities.

Introducing the SIK Capstone Contest

January 21, 2014 8

Do you use the SparkFun Inventor's Kit in your classroom? This contest is for you!

Teaching Robotics in Africa

September 4, 2013 8

Educational Outreach Coordinator Linz Craig goes to Uganda to teach robotics and eat a bunch of stuff he can't get in America.

Enginursday: Time-lapse with the Raspberry Pi Pt. 2

February 13, 2014 12

The next chapter in the Raspberry Pi Aquaponics Time-laspe project.

Women in Science and Engineering -- How do we increase the odds?

June 13, 2013 1

Reflection on an article about tech career advice from Google's top female executives

New Product Friday: A Generous Helping of New Products

September 6, 2013 35

Tacos, Heart-Break, and electronics. Check out what new products we have this week.

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Resources 13 found

ATTiny85 Quick Reference

Brian Huang February 13, 2015

ATTiny85 Cheatsheet / quick reference. This has all of the most commonly used Arduino commands in one place.

PicoBoard Library Resources

April 21, 2015

Here are some great resources to include the PicoBoard as part of your library or makerspace.

ASEE 2014 K-12 Workshop Materials

Brian Huang June 14, 2014

Encouraging Creativity, Gender Equity, and Arts in the STEM Classroom with Conductive Thread and LilyPad Arduino. Example Code Ardublock install – Unzip

ArduBlock: Graphical Programming Environment for Arduino

February 6, 2014

ArduBlock is a Scratch-like interface for Arduino and allows you to program Arduino using drag-and-drop blocks that free you of syntax errors.

HotSheets: Scratch

Derek Runberg April 18, 2014

These HotSheets cover a few basic introductory exercises at learning how to use Scratch and the PicoBoard.

Funding Sources for MakerSpaces in Libraries

April 21, 2015

Here is a short list of grants and funding sources for building out your own makerspace in your library or community center. Here are links to the raw sour

Programming with Simon

Lindsay Craig February 6, 2014

This material shows a way to re-use our popular Simon game to teach programming after you have used it to teach soldering.

Resistance Board

Lindsay Craig February 6, 2014

A project using e-textiles to show the concept of resistance in an intuitive manner.

e-Textile Mask Workshop

Angela Sheehan April 9, 2014

Presentation on sewing circuits and creating a light up mask used during Girl Scout Troop 73265's visit to SparkFun HQ.

Paper Circuits Pin

Angela Sheehan March 31, 2014

This quick craft project shows you how to create a circuit using copper tape instead of wire to light up an LED and make a wearable piece of e-craft art.

Paper Circuits: Lotus Flower Pop Up Card

Angela Sheehan May 6, 2014

Templates used in the Have Fun with Paper Circuitry workshop at GESTEM on 5/9/14.

Introductory Arduino Materials from Portland State University

February 6, 2014

A wide range of labs covering beginner and intermediate Arduino programming, DC and analog circuits, and two larger scale projects.

Classes 1 found

July 11, 2016

Microcontrollers for Educators

Connecting the STEM Dots: Microprocessors and Electrical and Computer Engineering in the Classroom. Colorado State University Dep…

Articles 29 found

The SparkFun Dumpster Dive

The Dumpster Dive is sold out! Check back later for the next Dumpster Dive!

Holiday Shipping 2013

With the holidays rapidly approaching, we want to make sure you get your presents in time! Please refer to the below shipping methods and dates to make sure you get your order by Dec. 24th. Please …

Nathan Seidle Bio

Nathan Seidle (pronounced sigh-dle) is the founder and CEO of SparkFun Electronics in Boulder, Colo. Nathan founded SparkFun in 2003 while an undergraduate student studying electrical engineering. …

Arduino Buying Guide

Arduino Buying Guide Let’s face it, there are a lot of different Arduino boards out there. How do you decide which one you need for your project? With this table, you can not only compare featu…

AVC 2013

AVC 2013 Thank you for coming to the Fifth Annual SparkFun Autonomous Vehicle Competition! Without you, this event wouldn’t take place - we really appreciate it! We are always looking for feed…

Accelerometer, Gyro and IMU Buying Guide

Accelerometer, Gyro and IMU Buying Guide Accelerometers and gyros are becoming increasingly popular in consumer electronics, so maybe it’s time you added them to your project! Scrolling through…

Installing Custom Boards in Arduino

Written By Timothy Holmberg Last Edited 7/13/15 Introduction We’ll use a great project from Casey at Sparkfun for our example today. In this project Casey makes a cool GPS based Speedometer fo…

TEI 2012

TEI 2012 Welcome to SparkFun’s workshop! Follow the link below for the class materials and code you’ll need to follow along. TEI Materials (5.4MB .zip)

GPS Buying Guide

GPS Buying Guide Above your head, right now, at an altitude of about 20,200 km there is a system of navigation satellites. There’s 35 of them, 24 active at any given time. It cost millions and …

Free Shipping July 15 - July 19

Starting at 12:01:01 a.m. (MT) on Monday, July 15th until Friday, July 19th at 11:59:59 p.m. (MT), SparkFun will be offering free economy shipping on orders over $60 (before taxes). This applies t…

Donation Day

On Monday, May 20, 2013, SparkFun Electronics will donate 10% of all sales to the Electronic Frontier Foundation. The Electronic Frontier Foundation - or EFF - is one of the very few non-profit legal…

SIK Capstone Contest

Since we first started teaching with the SparkFun Inventor’s Kit (or SIK), we’ve seen some teachers and students do amazing things beyond what the kit teaches. In the SIK Capstone Co…

Wireless Buying Guide

Wireless Buying Guide When it comes to throwing data over the ether, there are a lot of options. If you’re confused about what wireless technology is best for your next project then keep on rea…


Actobotics Actobotics is a robotics building system based around extruded aluminum channels, gears, precision shafts, and ball bearings. Thanks to the two standardized hole patterns, nearly all Actob…

XBee Buying Guide

XBee Buying Guide Welcome to the wireless world of XBee. Maybe you’ve heard of it, maybe you haven’t, either way you are in for a fun ride. XBees are tiny blue chips that can communicate …


Ever wondered what sort of hijinks go on behind the scenes at SparkFun? Do you dream of seeing certain SparkFun folks in their natural habitat? Well you’re in luck, because we host public tours …

SparkFun Sponsorships

SparkFun Sponsorships August 2014 Silicon Chef Maker Camp Berlin ISWC Major League Hacking Illinois Project Pitch Foothils United Way Fab Lab in Siegen, Germany SXSW Eco Heat Seek NY Hack…

ISS National Design Challenge

ISS National Design Challenge Have questions? Let me know! mike.grusin@sparkfun.com Welcome CASIS ISS National Design Challenge participants! The following parts may be useful when developing your …

Press Releases - 2012

January 25, 2012 - SparkFun Electronics’ Third Annual Free Day Event Draws More Than 32,000 Unique Website Visitors! - $200,000 in Store Credit Given Away During Website Free-For-All February 8, 20…

PicoBoard & Scratch Resources

PicoBoard & Scratch Resources Here are a few resources that we’ve used here at SparkFun around teaching PicoBoard and Scratch. This page is a work-in-progress. Please email us at (education…

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