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Top 10 Electronic Circuits October 2012

After a long period of time in which I forgot about the popular top 10 electronic circuits of the month, her comes the October 2012 one.

October 2012 Top 10

  1. Automatic battery charger
    12 volt Lead Acid battery charger that shut off the charging process once the battery attains full charge.
  2. Solar charger
    A solar charger circuit that is used to charge Lead Acid or Ni-Cd batteries using the solar energy power.
  3. 220V LED
    This is the simple version of a white LED lamp that can be directly powered from mains.
    It can give ample light even for reading purpose.
  4. Solar battery charger
    It is intended for charging lead-acid batteries, but may also be used for charging any battery at a constant voltage. Voltage output is adjustable.
  5. Battery level indicator
    This battery level indicator offers (5) LEDs that light up progressively as the voltage increases.
  6. Gas leak detector
    Here is a gas leak detector circuit that detects the leakage of LPG gas and alerts the user through audio-visual indications.
  7. Solar inverter
    It harvests solar energy to replenish 12 volt Inverter battery. It has auto cut off facility to stop charging when the battery attains full charge. The charger uses a 24 volt solar panel as input.
  8. Muscle stimulator
    It is useful to relieve headache and muscle pain and revive frozen muscles that impair movement.
  9. Ultrasonic pest repeller
    This electronic pest repellent generates powerful ultrasonic signals to repel pests.
  10. Solar garden light
    This Outdoor LED Solar Garden Lights project is a hobby circuit of an automatic garden light using a LDR and 6V/5W solar panel.

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