Sam Watson
Using 'bucking' batteries: The voltage of the smaller battery is subtracted from the larger battery and the positive end of the smaller battery becomes the negative end of the two. This really works.
Created: 10 Jul. 2014
3968 views
If circuit is built without resistor and fingertip bridges the gap the lamp will light. Water will also turn the circuit on, so it could be used to monitor any place that should stay dry. The lamp could be replaced by a sonalert for an audible alarm.
Created: 16 May. 2014
9702 views
Three-way Switch or How To Turn a Light On or Off From Either End of A Long Hallway Regardless Of The Position Of The Other Switch.
Created: 24 Dec. 2014
6055 views
74292
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