Activities/Turtle Art/Using Turtle Art Sensors: Difference between revisions
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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== | ||