circuits

Notes on electronics

active components

  • Batteries convert chemical energy to electrical energy
  • Capacitors store electric charge
  • Diodes allow electric current to flow in one direction
  • Inductors store energy
  • Relays are electromechanical switches that shut power on or off
  • Resistors limit current flow
  • Switches interrupt current
  • Transistors are used to amplify or switch electrical signals and power

MQ sensors

sensordetects
MQ-2LPG, C4H10, C3H8, CH4, C2H6O, H
MQ-3C2H6O
MQ-5C4H10, C3H8, CH4
MQ-6LPG, C4H10
MQ-7CO
MQ-135air quality (CO, NH3, C6H6, C2H6O, smoke)