There are occasions when a circuit needs to be fed with a square wave signal. To provide for such a scenario, we will build a square wave signal generator that uses a 555. A 555 can be configured to run in 3 different modes, the one that we are concerned with here is called the…
Even though languages have ways of generating numbers, these numbers are not truly random! A more accurate description of what has been generated is a pseudo random number! The very nature of computers and software is such that random behaviour is not a feature that they have. Because we want them to perform set tasks,…
OBJECTIVE The objective of this project is to simulate a rolling die. I will use LEDs arranged in the pattern of a conventional die and give the illusion that it is ‘rolling’ as a number is randomly chosen. THE CODE The first thing that I did was to create and initialise an array, with the…
The problem There may be occasions when you have a microcontroller that does not have enough GPIO pins for a circuit! Your circuit may require a large number of switches or LEDs, which would use up lots of GPIO pins. It’s likely that you will need some of the GPIO pins for other parts of…