Electronic Components




  • Positive DC terminal (higher voltage)
  • Thermistor (temperature dependent resistor)
  • Potentiometer (variable resistor)
  • LDR (light dependent resistor)
  • Resistor
  • Ground (lower voltage)











  • pin 13 of Arduino board
  • PWV (pulse modulated voltage)
  • isolating resistor
  • NPN transistor
  • ground (low voltage, not Arduino)
  • motor
  • battery +9V
  • voltage spike safety circuit
  • capacitor to store excess voltage
  • diode (one way flow) to drain excess voltage




by Uki D. Lucas on Thursday, July 21, 2011
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apt quotation..

“A man should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.”  by Robert A. Heinlein (author, aeronautical engineer, and naval officer)