Let’s take that example. If we try to read the voltage at v1, with our ATtiny micro-controller, surprisingly we can’t tell what the voltage will be. It may be at 0 Volts, sometimes, and 2.9 Volts or 4 Volts at other moments. It’s voltage is undefined and varies depending on what surrounds it, like any electromagnetic field. This is what… Read more »
Let’s say you have a 9V battery and you want to use it to power a red LED. You look at the LED specifications and you see that it requires a forward voltage of 2V and a current of 20 mA. If you connect the LED directly to the battery, what happens? You will get some light, if you are… Read more »
One of the most common component we use in our circuits is certainly the resistor. If you look at a resistor, you will see color bands on it. This is what you read to find out your resistor value (in Ohms). If you do a Google search on “resistor value”, you will find images like this one: Most of the resistors… Read more »