Some Calculations

1. Based on your voltage, amperage, and resistance design considerations and reflections develop asome simple calcualtions. The Excel Workbook, AnalysisWorkLamp.xlsx might be of some use.
2. Click on the images below to enlarge. Identify the fixed resistor, in particular, its colour bands. Use this resistor applet to identify the size of the resistor they used in this circuit. Does it match your calculations?

Circuit Front	Circuit Back

Power (Battery) Considerations

1. Explain the difference between Alkaline, NiCd, and NiMH battery technologies in terms of their chemical composition and reusability properties.
2. Through the use of their respective datasheets, summarize the metric dimensions and weight of each of AA, AAA, and 9V batteries.
3. What is meant by the term milliamp hours (mAh) and identify this value for each of the three battery sizes in Step 2.