Activities/Turtle Art/Using Turtle Art Sensors: Difference between revisions
Tonyforster (talk | contribs) |
Tonyforster (talk | contribs) |
||
| Line 415: | Line 415: | ||
The diode is still required. The original cat's whisker diode was made with galena crystals. | 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]] | ||
==Links== | ==Links== | ||