Not exactly schematics, but [Duckman] has some Arduino pinout diagrams he made using ASCII-art. These could be useful when pasted into source code as comments, documenting the pinouts for your ...

Is This a 'COVID 5G Chip Diagram'? The idea that vaccinations will be used by the government to secretly implant tracking devices in humans is a long-standing conspiracy theory.

Electrodes are inserted through stomata (small pores in the leaf surface regulating evaporation and gas exchange; dark green) into the inner leaf tissue. This way, electrical processes can be ...

To bring out the salient features in the eutectic region the section of the diagram shown in Fig. 1 has been restricted to pressures up to 1 atm. Schematic portions are shown as broken lines.

QElectroTech is an open source tool for drawing these types of diagrams. It consists of two tools: an element editor for creating schematic symbols and a diagram editor for creating your drawings.