i-TRIXX Supplement December 2008
Assorted small circuits

Add more speakers
Switching with relays
Potted-plant battery
Scarecrow
Acoustic finder for model aircraft
An intercom using six components
Schrödinger’s egg
Remote Control Extension
Eco-server
Parking sensor (also for men…)
LED bicycle lamp
Theremin Is Alive and Well
USB-controlled mains socket
Electronic cat’s eye
Code lock
Capricious blinking light
Moving-coil alarm sensor
LED Night light
6-component code lock
LED Blinker
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