Some of my research interests are: extrasolar planets, instrumentation (with special focus on small telescopes), and variable phenomena on the sky. I have been the Principal Investigator of the HATNet extrasolar planet search, which has been running since 2003, using telescopes in Arizona and at Hawaii. With HATNet we discovered 70+ transiting exoplanets so far (called HAT-P-1b through HAT-P-70b). I am also the PI of the HATSouth project that runs telescopes at three sites in the Southern hemisphere (Chile, Namibia, Australia). With 24 telescopes gathering data round-the-clock the "Sun never rises in the HATSouth empire". With HATSouth, we have found over 70 transiting extrasolar planets, many of these were first of their kind. Recently I have been working on a new project, called HATPI, which will monitor the entire sky visible from Chile at high cadence, high photometric precision, and moderately good spatial resolution.