We purchased this Shop Basics mechanical timer at Big Lots for 6 dollars. The 48 slide pins that you see on the face of this rotary clock correspond to 30 minute time intervals. As you can see the 10 depressed slide pins are night time intervals that are effectively temporary on switches. The On/Off sequence of slide pins can, of course, be changed for security purposes.
Low-Tech forms of home security are often as effective and less expensive than spending around $150 per month for security packages offered by ADT, Monitronics, Securitel, Vivint, Lifeshield, FrontPoint, Protect America, Pinnacle.
If I made the switch to a comprehensive security system that would protect my family from home invasions and theft, it would be FrontPoint. However, so far the low tech measures that we have implemented have been effective.