Pump Recommendation Please

I recently discover doing sets/cycling pressure works incredibly well for me. I recently hooked up my brake pump with a different hose which created a small air leak. With this I was able to pump up to 7-10hg and then the air would slowly leak out over the next couple minutes until it dropped down to around 4hg ish. Then I would pump back up again. I continued doing this for about an hour and the results were incredible, however, having to pump every couple minutes is a PITA when I’m trying to do other things so I was wondering if there are any automatic pumps that you can program to do sets/reps at a specific pressure for a specific amount of time.