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# Arduino Lecture 2 - Electronic, LEDs, Communications and Datasheets

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Continuing the coverage of the Arduino platform with some electronics revisions, an introduction to some communication issues, and some pointers about datasheets. Part of the Interactive Media Master's program at the University of Limerick.

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• If you are interested in a very good lighting for many hours and low costs I invite you to search the internet there are several sites where you can find extra information for example https://en.wikipedia.org/wiki/Light-emitting_diode and http://selsled.com

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• If you are interested in a very good lighting for many hours and low costs I invite you to search the internet there are several sites where you can find extra information for example Wikipedia and SelsLed

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• PDF with notes - http://richie.idc.ul.ie/eoin/presentations/imediaelectrionics101-08.pdf

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### Arduino Lecture 2 - Electronic, LEDs, Communications and Datasheets

1. 1. Electronics, LEDs, Communications and Data-sheets CS4062 - Eoin Brazil - Semester 2 - 2008
2. 2. Ohm’s Law
3. 3. Power
4. 4. Calculating power using resistance and current or voltage
5. 5. Kirchhoff’s Laws ﬁrst law / current law The current ﬂowing through a given circuit point is equal to the sum of the currents ﬂowing into that point and is equal to the sum of currents ﬂowing out of that point. Resistors in series - RTOTAL = R1 + R2 VOUT = VIN * R2 / (R1 + R2) e.g. 5V input, 2 x 1 k Ohm Resistors 5V * 1k / (1k + 1k) ... 5V * 1k/2k ... 5V * 0.5 = 2.5V = VOUT