Old Skool Clock Driver

I built a driver to send a 2 second 24V pulse to a slave clock once a minute to run the mechanism. Pretty simple, but it works :) some help from mem on the millis timeout. It's just the standard Arduino standalone without serial communication + a transistor and a DC-DC converter with regulated output. The link is a blow-up of the board. http://www.geocities.com/mycoleptodiscus/Picture1.jpg