Can I be really cheeky here?
You say
Can I make it without an Arduino?
Of course you can, and there are a few well proven ways to do this;
- The old fashion way, valves man, valves and plenty of them, pentodes preferably,
- A simple switch, grab a old guy off the street and tell him to push the button every two minutes.
These are just a few of my favourite things, err I mean ways .....
rockwallaby . . .