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Activities/Turtle Art/Using Turtle Art Sensors (view source)
Revision as of 03:51, 2 December 2010
, 03:51, 2 December 2010→Photovoltaic panel
IT IS RECOMMENDED THAT A SERIES PROTECTION RESISTOR BE BUILT INTO THE PHONO PLUG AND LEADS IF USING AN EXTERNAL VOLTAGE
IT IS RECOMMENDED THAT A SERIES PROTECTION RESISTOR BE BUILT INTO THE PHONO PLUG AND LEADS IF USING AN EXTERNAL VOLTAGE
Shown is the solar cell from the D.LIGHT S250 [[http://www.dlightdesign.com/products_D.LIGHT_S250_global.php]]
It has a 6V solar cell, the outer connection is -ve and the inner +ve
It has a 6V solar cell, the outer connection is -ve and the inner +ve
[[File:Photovoltaic.jpg]]
[[File:Photovoltaic.jpg]]
A voltage divider is needed to bring it into the range of the XO1 0.4V to 1.85V (XO1.5 0.17 to 3.0V)
A voltage divider is needed to bring it into the range of the XO1 0.4V to 1.85V (XO1.5 0.17 to 3.0V). With the values shown below, the sensitivity is reduced by
1k/(1k +2.7k) = 1/3.7
giving a maximum of 6.8V XO1 or 11.1V XO1.5
[[File:PV voltagedivider.jpg]]
== RC time constant ==
== RC time constant ==