Solar Powered Animal Scarer

Here is a solar powered Flasher to scare away the nocturnal animals like bats and cats from the farm yard or premises of the house. The brilliant multicolored flashes confuse these animals and they avoid the hostile situation. It is fully automatic, turns on in the evening and turns off in the morning.

The circuit has an LDR controlled oscillator built around the Binary counter IC CD 4060.The functioning of the IC is controlled through its reset pin 12. During day time, LDR conducts and keeps the reset pin of IC high so that it remains dormant. During night, LDR cease to conduct and the reset pin will be grounded through VR1. This triggers the IC and it stats oscillating using the components C1 and VR2. Output pins 7, 5 and 4 are used to power the LEDs strings. VR1 adjusts the sensitivity of LDR and VR2, the flashing rate of LEDs. High bright Red, Blue and White LEDs are used in the circuit to give brilliant flashes. Red LEDs flash very fast, followed by blue and then White. White LEDs remains on for few seconds and provide light to a confined area. More LEDs can be added in the strings if desired. The circuit can also function with 12 volt DC.

Animal Repellent Circuit Diagram


The circuit uses a solar powered battery power supply. During daytime, battery charges through R1 and D1.Green LED indicates the charging mode. During night time current from the solar cell decreases and D1 reverse biases. At the same time D2 forward biases to provide power to the circuit. Resistor R1 restricts the charging current and the high value capacitor C1 is a buffer for current.

Animal Scarer Solar Power Supply



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  • Arjun Vikas

    Sir could you please send the design equations for power supply and rc network

  • Sinoch

    Can I ask you about the adjustment of VR1 and VR2?
    What will happen if I adjust VR1?
    What will happen if I adjust VR2?
    Please help me!

  • Charles

    This circuit has a major flaw. As it is currently shown, the LEDs will hardly even light. It won’t be anything like brilliant. LED’s typically require 20mA for full brightness.

    A driver transistor and current limiting resistor are needed for each string.

    The current output for the 4060 is only 8.8mA even with a 15v supply. Also note that even when the chip is supplied 15v the output will only be 13.5v for high signal and 1.5v for logic low. So a 12v supply will likely give a 11v signal output.

  • Haslan

    dear sir,

    im a electrical engineering student. im interested to do this project as it seems interesting.

    please send me the fully detail description on this project.

  • Udhaya Raj

    it is a nice circuit, and the panel used in this is rated as 12V and there is a 1N4007 diode so there will be a drop of 0.7V, after this we will get 11.3V,

    how this voltage is sufficient to charge a 12V battery……
    i think the battery won’t charge
    waiting for your reply

  • inam ali shah

    hello sir

    thnx alot
    i am realy impress form your ckt.

    actualy i am an electronic diploma holder and take intersst in making these ckt . s o plz email me the 12v t0 230 volt dc ckt
    thnx alot


    Try the circuit and see its use.Thanks

  • Dolhan

    Great idea for this electronic design, it is very useful as animal repellent and use solar energy, great just beautiful. Thanks Mohan kumar.