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The Brontophonic Sound Circuit (ART401E)
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Psychological Alarm (ART410E)
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Different rhythmic Light (ART409E)
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Simple Audio Attenuator (ART407E)
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Delayed Pulse Generator (ART404E)
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Voltage Inverter for Automotive Use (ART403E)
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Nicad Battery Charger (ART399E)
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Sensor Uses Engine Vibration (ART398E)
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Differential Hall Sensor (ART397E)
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False Money and Documents Detector (ART396E)
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Mini Electrifier (ART395E)
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An Experimental Amplifier (ART394E)
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Constant Lighting (ART393E)
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0 to 15 V x 1 A Power Supply with Touch Voltage Control (ART391E)
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Preamplifier For Magnetic Pickup (ART390E)
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Electronic Thermometer (ART389E)
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Electronic tuning fork (ART388E)
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Active Tone Control (ART387E)
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Fluorescent Blinker (ART386E)
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Selective Relay (ART384E)
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Battery LED flasher (ART382E)
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Timed Battery Eliminator (ART381E)
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Cyclic Fade Light (ART380E)
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Priority Switch (ART379E)
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Parabolic Microphone (ART377E)
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Emergency Lighting (ART385E)
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Automatic Shutdown Timer (ART373E)
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Experimental Radio with a Credit Card as a Detector (ART362E)
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Strobe Light (ART374E)
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Listening Through the Walls with a Nail Microphone (ART365E)
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