In all the projects and explanations I will use various terms to identify the same thing.

In particular I could mention -, 0V, negative pole of the battery, ground, GND and Vss.

Those all mean the negative pole of the battery that is at 0V.

On the other side of the spectrum I mention +, Vcc, Vdd or positive pole.

This refers to the positive pole of the battery which exact value will be different depending on the battery or power source used: 9V, 3.3V, 5V, and so on.

Why so many terms? Different families of electronic components adopted different acronyms:

• TTL (Transistor-Transistor Logic) components use Vcc and GND.
• CMOS (Complementary Metal-Oxide-Semiconductor) components use Vdd and Vss).

Lessons in this unit:

0:	Introduction
1:	Introduction to Electronics
2:	Analog vs digital
3:	Current
4:	Voltage
5:	▶︎ Vcc, ground, ...
6:	Resistance
7:	Short Circuit
8:	Your first circuit
9:	Prototyping using breadboards
10:	Using a multimeter
11:	Measuring voltage, current and resistance using a multimeter
12:	Milli Micro Nano Pico
13:	Calculating Ah from Watts
14:	Electronic Project: Build a voltage divider
15:	Electronic Project: Build a LED dimmer with a potentiometer