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Activities/Turtle Art/Using Turtle Art Sensors (view source)
Revision as of 23:48, 19 February 2011
, 23:48, 19 February 2011→The XO as an audio amplifier
The diode is still required. The original cat's whisker diode was made with galena crystals. [[http://en.wikipedia.org/wiki/Cat%27s-whisker_detector]] Other materials are iron pyrite ("fool's gold", iron disulfide), silicon, molybdenite (MoS2), and silicon carbide (carborundum, SiC). It is also possible to use a rusty razor blade (iron oxide).
The diode is still required. The original cat's whisker diode was made with galena crystals. [[http://en.wikipedia.org/wiki/Cat%27s-whisker_detector]] Other materials are iron pyrite ("fool's gold", iron disulfide), silicon, molybdenite (MoS2), and silicon carbide (carborundum, SiC). It is also possible to use a rusty razor blade (iron oxide).
==The XO as an audio signal generator==
The doorbell and remote doorbell showed how to generate an audio tone in Turtle Art, the following code in Pippy can also generate a tone (from Guzman Trinidad)
import pippy*
f= input ("Ingrese la frecuencia a generar (Hz):")
t= input ("Ingrese el intervalo de tiempo (s):")
pippy.sound.playSine(f, 5000, t, 0)
pippy.sound.audioOut()
The volume level can be amplified with a CD or tape player or amplified PC speakers.
==FSK Teletype==
==FSK Teletype==