Making and Using Slip Rings
Slip rings allow electricity to pass through a continuously rotating axis, and open up a lot of possibilities.
Illustrated Articles Relating to Electricity . . .
Towards Reliable Electrics
Hard won tips for constructing a nervous system that functions for many years.
High Current LED Pulsing
LEDs can be used in a "strobe light" manner, within limits. Information on LED experiments and driving circuits .