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Activities/Turtle Art/Using Turtle Art Sensors (view source)
Revision as of 01:31, 4 December 2010
, 01:31, 4 December 2010→The XO as an audio amplifier
The tuned circuit inductor, 75 turns of insulated wire on a toilet paper core.
The tuned circuit inductor, 75 turns of insulated wire on a toilet paper core.
[[File:Capacitor.jpg]]
The tuned circuit capacitor, two sheets of aluminium foil approximately 10cm x 10cm separated by cling wrap gave a resonant frequency of approximately 1MHz with the above inductor.
Still required are the diode and the 0.1uF capacitor. It would be possible to construct the capacitor in the same way, the tuning capacitor is estimated at 100pF (10^-10 F) and the coupling capacitor needed is 0.1uF (10^-7 F). Tightly rolling the layers would reduce the plate separation so it might be possible to get a workable coupling capacitor with less that one thousand times the area.
==Links==
==Links==