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Activities/Turtle Art/Using Turtle Art Sensors (view source)
Revision as of 20:15, 8 November 2010
, 20:15, 8 November 2010→Carbon Microphone
Graph the resistance, pressing on the foil changes the resistance. You have built a pressure sensor. It can also sense air pressure. You have built a microphone. Change to Sound sensing. On my first try I was able to sense clapping.
Graph the resistance, pressing on the foil changes the resistance. You have built a pressure sensor. It can also sense air pressure. You have built a microphone. Change to Sound sensing. On my first try I was able to sense clapping.
==Lemon battery==
See http://en.wikipedia.org/wiki/Lemon_battery
With a copper wire and galvanised nail, the measured voltage is 0.93V, comfortably within the measurement range of the XO1 laptop. The laptop produced negligible loading on the open circuit voltage. With copper wire and an ungalvanised nail the voltage was 0.49V.
==Links==
==Links==