Changes between Version 19 and Version 20 of ControlSystems/Electrical/Training/Arduino/Lesson2

Timestamp:

Oct 20, 2015, 8:13:41 PM (10 years ago)

Author:

David Albert

Comment:

--

ControlSystems/Electrical/Training/Arduino/Lesson2

@@ -21 +21 @@
        * KWh = Kilowatt-Hours (another measure of energy) = Watts-per-hour/1000
    * Who's who (literally): [https://en.wikipedia.org/wiki/Alessandro_Volta Volta], [https://en.wikipedia.org/wiki/Andr%C3%A9-Marie_Amp%C3%A8re Ampere], [https://en.wikipedia.org/wiki/James_Watt Watt], [https://en.wikipedia.org/wiki/James_Prescott_Joule Joule], [https://en.wikipedia.org/wiki/Georg_Ohm Ohm]
-* Batteries
+* Batteries - old school vs. new school
    * [http://engineering.mit.edu/ask/how-does-battery-work What is a battery]
    * [http://mechanicalmania.blogspot.com/2011/07/types-of-battery.html Primary vs. secondary]
        * FIRST bots use sealed [https://en.wikipedia.org/wiki/Lead%E2%80%93acid_battery lead-acid] batteries (1800s technology!)
        * Mini-bots use primary alkaline batteries (developed 1899-1901)
-       * See [https://www.youtube.com/watch?v=Tpb-n22Y-sY why we are not using lithium batteries]
-       * I have one of those in my pocket???? Yes, for the same reason they are used in quad-copters and other applications where weight really matters: [http://www.allaboutbatteries.com/Battery-Energy.html Wh/kg]
+       * See [https://www.youtube.com/watch?v=Tpb-n22Y-sY why we are not using lithium batteries]  (new school)
+       * Good gracious...I have one of those in my pocket!  Why do they use lithium batteries in cell phones and laptops if they are so volatile? For the same reason they are used in quad-copters and other applications where weight really matters: [http://www.allaboutbatteries.com/Battery-Energy.html Wh/kg]
    * Voltage:
        * Nominal voltage (alkaline=1v5/cell, SLA=2v15/cell)