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Chapter 4 Making Connections

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Basic Electronics

Basic Electronics. I. OHM'S LAW. R. V. V = I * R. volts = amps * ohms volts = mA * Kohms. resistor. I. 1/R. V. I = V/R = 9V/1K = 9mA = .009A. I. LED. anode. ~10 mA. I. cathode. + 1.5 V -. I = ??. ARDUINO CONTROL OF LED. ARDUINO. 5V. 0V. PIN 0. 20 mA max. GND.

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