You need a power source, a way to level convert the driver pins, and some protection in case something goes wrong with the circuit ... he was able to control the relay using 3.3V, 5V, or 12V.

"Hydraulic Schematics and Basic Circuit Design" provides an overview of basic hydraulic circuit configurations and the standard fluid symbols in fluid schematic diagrams. A hydraulic schematic diagram ...

In reality a transistor is generally added to the circuit to provide enough power to control the relay, while a diode ... you now have the most basic IoT device: an Internet connected switch.

Nerve cells, or neurons, are the basic functional units of the nervous system. Multiple interconnected neurons form a neural circuit and use electrical and ... 1 Interneurons Interneurons, also known ...