I am trying to build eight 7-segment displays controlled by an Arduino Uno. I need the displays to be these ones:
It seems that the easiest solution is to use the MAX7221 component, that should do all the work:
This component usually should work well with an Arduino, but due to technical requirements with the 7-segment displays it seems it is going to be necessary to add an external power supply to turn on the segments.
It seems that it is needed also an extra configuration with the MAX7221 component using some resistences / transistors to handle more voltage and amperage, as explained here:
Could anyone explain to me, apart from the Arduino, the displays and the MAX7221 component, what additional setup whoud I need in order everything to work correctly and some advices with the external power supply and how to make sure that nothing gets fried? I dont have high electronics knowledge, so I will appreciate an explanation as less technical as possible.
Thanks in advance!