Home Do It Yourself Laser Tripwire Alarm – Mount the Laser Pointer and the Alarm Circuit to Form a Single Beam Tripwire 3 Do It Yourself Laser Tripwire Alarm - Mount the Laser Pointer and the Alarm Circuit to Form a Single Beam Tripwire 3

Do It Yourself Laser Tripwire Alarm – Mount the Laser Pointer and the Alarm Circuit to Form a Single Beam Tripwire 3

Do It Yourself Laser Tripwire Alarm – Mount the Laser Pointer and the Alarm Circuit to Form a Single Beam Tripwire 2

Do It Yourself Laser Tripwire Alarm – Use Mirrors to Make a Multibeam Tripwire 1