LED circiut.
Posted Sep29-09 at 09:54 AM by Integral
Finally moved on from the resistor color code. We passed out a sheet giving a brief description of a LED and a simple schematic diagram. The next project will be to build the circuit on a breadboard. Unfortunately we have not yet introduced either Ohm's Law or even current so it is difficult discuss anything of significance concerning the circuit.
It really seems to me that Ohm's Law is one of the key concepts that this class is presenting . If I were presenting the class Ohm's Law would be on the board the first day of class and virtually everything would be discussed in light of Ohm's Law. We could now see that no matter what resistor was in series with the LED it's voltage drop remains nearly the same. Of course this would have been preceded by a lab using a incandescent lamps so the difference in behavior could be discussed.
I am now also helping in a Algebra I class but so far the entire class is spent on lecture with no opportunity to help students.
It really seems to me that Ohm's Law is one of the key concepts that this class is presenting . If I were presenting the class Ohm's Law would be on the board the first day of class and virtually everything would be discussed in light of Ohm's Law. We could now see that no matter what resistor was in series with the LED it's voltage drop remains nearly the same. Of course this would have been preceded by a lab using a incandescent lamps so the difference in behavior could be discussed.
I am now also helping in a Algebra I class but so far the entire class is spent on lecture with no opportunity to help students.
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