Calculating correct resistor value to protect Arduino pin
![Ohms Law](https://hardwarefun.com/wp-content/uploads/sites/2/2012/08/ohms-law-200x180.png)
Once of the important things to do when you play around with electronics is to make sure that you are safe-guarding your electronic components from over current. The most common way to do that is by adding a resistor in series. You can calculate the value of the resistor needed for safe operation by using […]