Electronics shop with friendly service, stocking circuit components, tools and heat-shrink tubing. Elliott Electronic Supply

Adafruit or SparkFun: Best for curated resistor kits (packs of common values) geared toward beginners and hobbyists. Expand map Specialty Component Shops Electronics Retailers Electrical Supply Houses Electronic Parts Co

If local shops are unavailable, these major distributors offer massive inventories and fast shipping: Digi-Key: The industry standard for individual components.

Mouser Electronics: Similar to Digi-Key, specializing in a wide range of electronic parts.