- Resistor Calculator
- Basic formulae
- Resistive voltage divider calculator.
- AVR Fuse Calculator
- EasyEDA - Circuit Design & PCB Layout
- All About Circuits
- Electronics Lab
- Electronics & Meccano
- Model railway.
- Electronics 2000
- Electronics Club
- Maker Pro
- Misc Circuit Diagrams
- Scott's Arduino Projects
- RED Free Circuit Designs
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