Resources

Robotics Clubs:

Robomo – The St. Louis Area Robotics and Electronics Club
Club List – List of some robotics clubs in the U.S. List may not be up to date.
SRS – Seattle Robotics Society
RSSC – Robotics Society of Sothern California
HRB – Homebrew Robotics Club
AHRC – Atlanta Hobby Robot Club
TCRF – Tolland County Robotics Foundation
TCRG – Twin Cities Robotics Group
ORE – Ottawa Robotics Enthusiasts
PARTS – Portland Area Robotics Society
CMRC – Carnegie Mellon Robotics Club
TRG – The Robot Group
DPRG – Dallas Personal Robotics Group

Competitions:

Builders Database – Great site to find and register for robot competitions, mostly RC Combat, but there are other types as well.
Robot Combat Events – List of RC Combat competitions from all over the globe with links to club and registration sites.

Hobby Robotics Suppliers:

Parallax – Offers Numerous Robotic Kits, Components, and Helpful Information and Resources for all Projects.
RobotShop – One of the Leading Source’s for Domestic and Professional Robot Technology.
Pololu – Offers a Wide Selection of Robot Kits, Mechanical Parts, and Electronics.
Robotics Connection – High Quality Programmable Robot Kits, Components, and Hardware.
IFI Robotics – Supplier of Large Robot Parts and Electronics Primarily used for FIRST Robotics.
Zagros Robotics – Excellent selection of parts for RC robotics.
AMain Performance Hobbies – Supplier of many brands of RC planes, boats, cars, trucks, drones, helicopters and rock crawlers.
Solarbotics – Kits for any skill level and supplies to build your own designs as well.
Lynxmotion – Huge selection of robot platforms ranging from wheeled rovers to 6 legged walking hexapods to robotic arms
OwiRobots – Distributor of various robot kits and toys
SunFounder – Manufacturer of robot kits oriented towards education.
Sparkfun – Offers a Large Selection of Electronics for Robotics Applications or Anything Else
Dimension Engineering – Specializes in Robot Power Electronics, Radio Control Equipment, and More
Robot Power – Economical Motor and Motion Control Solutions for Many Applications
Adafruit – Electronics Hobby Supplier
Solutions Cubed – Produces Versatile and Affordable Engineering Modules
SchmartBoard – Offers several items that make hand soldering SMT parts fast, easy, and flawless
MaxBotix – Leading supplier of ultrasonic rangefinders
BaneBots – Large Selection of Gearmotors Offered in Many Different Reduction Ratios
ServoCity – A varied supply of higher end parts and kits.

MicroControllers & Development Kits:

A-WIT Technologies, Inc. – Fabricators of printed circuit boards
Basic Micro – Makers of the Basic Atom Microcontroller
MicroEngineering Labs, Inc. – Specializes in Development Tools for Microchip PIC Microcontrollers

Commercial Robotics and Electronics:

Trossen Robotics – Distributor of Robot Components, Electronic Hardware, Educational Material, and also Features a Popular Forum.
Actuonix – Manufacturers of micro-linear actuators that are ideal for robotics applications.
Digilent – Suppliers of Programming Design Kits for Learning and Research Applications
LabJack – USB/Ethernet Based Measurement and Automation Devices
ROHM Semiconductor – They design and manufacture integrated circuits (ICs), semiconductors, and other electronic components

Robotics Magazines/Books/News:

BotJunkie – Collection of Stories and Articles about Recent Robotics Announcements and News from IEEE Spectrum
Nuts and Volts Magazine – Popular magazine for Electronics Hobbyists
Robot Magazine – The Latest in Hobby, Science, and Consumer Robotics
No Starch Press – Collection of Books about various “Geek Topics”
Make – An excellent source of DIY projects, ideas, products, and a magazine for makers of all types.
Electronics Products Magazine – Online magazine featuring electronic information, hot tips, trends, gizmos & gadgets
EE Power – Technical articles, design tips, and application notes from the industry’s leading power electronics engineers and application experts.

Software:

Pictorus – A low-code visual programming online tool for hobbyists and engineers

Robotic Combat:

Standardized Procedures for the Advancement of Robotic Combat – Popular Online Forum for Robotic Combat Competitors With Good Resources
The Robot Marketplace – Large Supplier of Robot Components Specializing in Robotic Combat Applications
BotKits – Maker of very fine wedge bots.
Fingertech Robotics – A design and manufacturing company that produces custom purpose-built electronics, mechanical parts, hardware, and accessories for hobby robotics.

Batteries

RC Judge – Good article on battery chargers. The rest of the site has reviews on all types of RC toys

Hardware/Materials/Tools:

PROBOTIX – Supplier of affordable CNC routers, CNC stepper motor driver systems, and more
Sherline – Manufacturer of Miniature Lathes, Vertical Milling Machines, and Machining Accessories
Fastener Express – Offers a Large Variety of Miniature Hobby Screws in Metric and Standard Sizes

LEGO Robotics:

LEGO Mindstorms – Very Popular Robotics Kits Built From Traditional LEGOs (Great for Beginners or Experts)
Mindsensors – Supplier of Custom Sensors and Interfaces for LEGO Mindstorms NXT, RCX Robotics kits, and FIRST VEX Kits
AndyMark – Specializes in a Large Variety of Mechanical Components for FIRST Robotics

Commercial/Research/Industrial/Toy Robots:

Pleo – Advanced Robotic Dinosaur
WoWee – Various Robotic Toys and Personal Robots
Tamiya – Offers a Large Variety of Mechanical Models and Accessories
iRobot – Leading Manufacturer of Robotic Vacuums and Robots for other Applications such as Government and Industrial Applications
Dr. Robot – Large Selection of High Quality Robot Platforms and other Robotics Components

How To and Instructional Websites:

All About Circuits – An active electrical engineering online community that provides both content and resources for Electrical Engineers
Robot Room – A site with simple and clear how-to articles for different electronic projects and troubleshooting. Plus more.
Learn About Robots – A place where you can learn about all types of robots and robotics engineering.
Leg Control & Design Principles – A comprehensive introduction into leg control & design.
Automotive Machines and Design Principles – A good article on this subject that is geared towards high school students.
Karakuri – A website that explains Karakuri and social robots.
Hobby & DIY Storage – A detailed article on best practices for storing hobby items.
Legal Protection for Hobbyists – A guide for artists, builders, hobbyists, and tinkerers to legally protecting their ideas.
A Guide to Robotics Technology – A guide covering history, components and mapping with a good number of links to useful resources.
Maker Pro – Provides a place for makers to share designs, collaborate with one another, and learn how to take products to market.
A Handyman’s Guide to Tinkering – A beginners guide with links on how to set yourself up and tinker with stuff around the house.