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How To : Build a Laser Tripwire and Alarm with Snap Circuits

Want to learn how to build a laser tripwire and alarm out of snap circuits? I'll show you how to build both circuits— the laser tripwire circuit and the alarm circuit. Video: . The alarm is a very simple two-transistor oscillator that is switched on by the relay in the laser t ...more

How To : Display lightning FX & fog into back of tombstone

Check out this demonstrational video to learn how to create lighting FX and fog behind the back of a tombstone that's a great prop for Halloween sets. The idea is to combat wind and create atmosphere by letting the fog hit the back of the tombstone to collect in an area, then ...more

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