Lesson 5 The Effect Resistors Have on a Circuit

Chapter Lesson 5 The Effect Resistors Have on a Circuit

Electronic Circuits for the Evil Genius Second Edition 64 Lessons with Projects
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Electronic Circuits for the Evil Genius Second Edition 64 Lessons with Projects

  • probes. Then ask them an embarrassingquestion. Watch the resistance go down fora moment.4.Write each of these values as a number withno abbreviations.■10 k________■1 k________■0.47 k________■47 k________Lesson 5The Effect Resistors Have on a CircuitThroughout electronics, resistors are used tocontrol the voltage and flow of the current. Eventhough this lesson is not very long, it does taketime. Do it properly and you will get properresults. You will observe, chart, and describe theeffects of different strength resistors when they areall set up in identical circuits.Let’s go back to the breadboard and see howdifferent resistors affect a simple circuit. Both theresistors and LEDs are loads. The resistor usesmost of the voltage, leaving just enough for theLED to work. The LEDs need about two volts.What would happen if you changed resistors onthe circuit you just built, shown in Figure L5-1?You measured the voltage used across theresistor from TP-B to TP-C and measured thevoltage used across the LED from TP-C to TP-D.Lesson 5 ■The Effect Resistors Have on a Circuit 17First Band:Second Band: Third Band: ValueValueNumber of ZerosResistor ValueDMM ValueBrownBlackBrown100 ________100VioletBrown470 ________470BrownBlackRed1,000 ________________00BrownBlackOrange10 k________________00010,000RedRedOrange22 k____________________22,000 BrownBlackYellow100 k____________________100,000TABLE L4-2Resistors NeededFigure L5-1