This is a collection of small web tools to help a newbie like me with electronics projects. Each tool is designed to be used in the browser with no need of a server, so they can be used locally or with a web server serving static pages.
Arrange components on a perfboard, save and load designs by downloading and uploading JSON files (files are "uploaded" to the browser via Javascript, a server is not necessary).
A simple tool to calculate resistor values for limiting current to a LED.
A simple tool to decode resistor color bands.