I would like to build a mini standalone LED matrix as a pressie for my wife (she likes geeky presents) I am going to use a few parts I have lying around to make it. That is, an ATTINY25v and a couple of shift registers to drive a 5x6 LED matrix powered by a 9v battery.
Both the ATTINY and the shift registers have a really wide voltage tolerance (~2v-5.5v) so will I still need to use a voltage regulator? Or can I get away with some resistors.
Thanks in advance.