Spynet Laser Trip Wire

Product Information

What is behind this little laser trip wire is actually a red laser line that triggers a latch-switch when tripped.

The v2 is pretty much like the v1 just instead of stopping the alarm with a simple push button, now it requires a passcode entered by the keypad to stop it, otherwise it won’t. When i was a kid i did something similar to close the TV application on the computer when my parents opened the door.

My laser pointer (and all of the others I have seen) have a completed circuit when the end cap is on, so I connected the other alligator clip to the bit of metal on the inside of the laser pointer. The 1N4007 diode (D2) connected in antiparallel with the electromagnetic relay (RL1) functions as an “orthodox” flywheel diode to protect the electronics from damage due to the back-emf pulse generated in the relay coil’s inductance when T1 turns off. We’ll achieve this by cutting off a short section – between 2cm and 5cm – of an opaque drinking straw, and inserting the head of the LDR into one end. As a result, they can be used in situations where physical barriers would be difficult or inappropriate, such as open fields or large outdoor areas.

With cables, you can be sure that triggering a sensor will be detected by the puzzle controller and won't ruin the experience. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.The pullup resistor and voltage source are internal to the MCU (Arduino) in this case and the “button” is our photoresistor.