SparkFun Tutorials cover a ton of stuff – I like the LED tester

https://www.sparkfun.com/tutorials

While I was looking for a simple way of testing LEDs, I came across this tutorial on making a cool tester. https://www.sparkfun.com/tutorials/376

But then I started to check out all their tutorials and they have a really nice selection. I am going to try and cut and paste all the different categories below.

 

Assembly and Quickstart Guides 65 in this category »

  • Mono Audio Amplifier Quickstart Guide
  • EL Wire Quickstart Guide
  • Stepper Motor Quickstart Guide
  • Flexiforce Pressure Sensor (25lbs) Quick Start Guide
  • SparkFun Ethernet Shield Quickstart Guide

SparkFun Projects 84 in this category »

  • Python and GPS Tracking
  • Testing LEDs with fast-switching tweezers
  • HAB Launch – S1
  • Robot Journal – Michelle
  • Robot Journal – Toni

General Explanation 16 in this category »

  • LogicBlocks Experimenter’s Guide
  • LogicBlocks & Digital Logic Introduction
  • The FCC and Open Source Hardware
  • Electric Imp: Serial communication between Imp and Arduino
  • Digital Caliper Battery Hack

Surface Mount Soldering Tutorials 12 in this category »

  • Making Your Own Solder Paste Stencils
  • SMD How To – 3
  • SMD How To – 8
  • SMD How To – 6
  • SMD How To – 2

E-Textiles 9 in this category »

  • Twinkling Fairy Wings
  • Using the LilyPad LilyTwinkle board
  • ProtoSnap – E-sewing Kit: Getting Started Guide, Part 2
  • Decorative Conductive Fabric Button
  • Beginning LilyPad Arduino

Bite Sized Primers 8 in this category »

  • Sizing a heat sink for a heavy load
  • Number Systems
  • LED Current Limiting Resistors
  • Beginner Troubleshooting
  • RS-232 vs. TTL Serial Communication

Print Ads 10 in this category »

  • Dwight Eppinger, Interactive Marketing Director at Copper Mountain
  • Jen Lewin, Creator of “The Pool”
  • Jamie Robertson, Creator of the MP3 Trigger
  • Steven Kennedy, SparkFun Enthusiast and High School Teacher
  • Landon Cox, creator of an electronics-based speed climbing timer.

Beginning Embedded Electronics 11 in this category »

  • Beginning Embedded Electronics – 7
  • Beginning Embedded Electronics – 11
  • Beginning Embedded Electronics – 10
  • Beginning Embedded Electronics – 9
  • Beginning Embedded Electronics – 5

General PIC Tutorials 8 in this category »

  • MCP Upgrade tutorial
  • Mini-ICSP Updates
  • Serial IO
  • The Biggie
  • Basic breadboard tutorial

PIC Boot Loader 3 in this category »

  • Bloader and Screamer
  • Bloader and Screamer 877A
  • Bloader for the 16F88

PIC Programmer Setup Tutorials 8 in this category »

  • PG3B ICProg tutorial
  • PG3B WinPicProg tutorial
  • Setting up the MCP under MPLAB
  • Setting up the In Circuit Debugger under MPLAB
  • Programmer and Board Test Program