Tag: #electronics

What is electric charge?

Electric charge is the number of electrons minus the number of protons in an object. 2017-01-18

How does differential signaling work in USB?

USB uses “differential signaling” where the sender transmits two signals, D+ and D-, and the receiver interprets the difference D+ - D-. This cancels out electromagnetic interference that affects both wires equally. 2017-01-08

How does the USB power wire work?

The four wires in a USB cable are power (black, red) and data (white, green). One can power devices by connecting the ground and +5V wires, ignoring the data wires. 2017-01-07

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