A Low-Voltage Remote Controller for Special Effects

Kenneth J. Lewis

 

Special effects that respond to a simple on/off control signal can be operated by a Magnetic Reed-Switch (MRS) Controller. The MRS Controller will operate such effects as “wheat” lamps, star-drop circuits, bells, buzzers, and solenoids without requiring sophisticated electronics and construction.

An MRS operates by reacting mechanically to the presence of a magnetic field. It is widely and cheaply available because of its use in intruder-alarm systems. In such systems, the switch is placed on a door jamb, and the magnet on the door. When the door is closed, the magnet holds the switch closed, completing a normally closed circuit. When the door is opened, the magnet moves ...

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