Solar Powered Animal Scarer Circuit

This Solar Powered Animal Scarer uses sun power to keep animals away.

It makes noise, flashes light or do other things to scare birds, rats, big animals.

People with garden, farm or open place use it to protect plants and people.

Circuit has three main parts:

• Solar panel charges battery in daytime.
• Sensor detects or hears animals.
• Tool sends sounds only animals hear with flashing lights or scary noise.

When sensor finds animal circuit turns ON scary tool and animal runs away.

Circuit Working of Animal Repellent :

Parts List:

This solar device scares night animals like bats and cats to keep them from farm or garden.

It uses bright, colorful flashing lights.

Animals get confused and run away.

It works by itself and turns ON at night and OFF in morning.

Inside is oscillator with LDR and IC CD 4060 a binary counter.

IC uses pin 12 reset.

In daytime LDR gives power and keeps pin 12 high and IC stops.

At night the LDR stops power and pin 12 goes low by VR1.

Now IC starts and makes flashing lights with C1 and VR2.

LEDs connect to pins 7, 5 and 4.

VR1 sets LDR sensitivity.

VR2 changes flash speed.

Uses strong red, blue and white LEDs.

Red blinks fast first, then blue and then white.

White LED stays ON short time to light small area.

Can add more LEDs if want.

Circuit runs on 12V battery or power supply.

Formulas:

We can use IC 4060 to make animal repeller circuit.

IC 4060 is special chip that counts and makes signal many times (oscillator).

It has 14 steps and gives steady signal.

Oscillator frequency how fast signal goes depends on resistor R and capacitor C on pins 9 and 10.

Use this formula to find frequency (approx):

f = 1.44 / ((R + 2 × Rpot) × C)

where,

• Rpot is variable resistor we can turn to change frequency.

Duty cycle how long LED stays ON can change with capacitor and potentiometer.

Duty cycle = T1 / T

where,

• T1 is LED ON time
• T is full ON + OFF time.

To stop LED burning use resistor:

RLED = (Vsupply – VLED) / ILED

where,

• Vsupply is the battery power
• VLED is LED voltage for 2V
• ILED is LED current from 10 to 20 mA

Different animals need different settings.

Change R, C, VR to get best result.

How to Build:

To build a Solar Powered Animal Scarer Circuit one needs to follow the below mentioned steps:

• Connect LDR to pin 12 on IC CD 4060.
• Pin 12 resets IC when light changes and LDR controls this.
• Join VR1 with LDR to set how sensitive LDR is.
• Connect VR2 to IC to change how fast LEDs flash.
• Add resistors R1 and R2 with VR2 to stop too much current to LEDs.
• Put diode 1N4007 between solar panel and battery to stop power going back.
• Put diode 1N4007 between battery and circuit to stop power going wrong way.

Connect LEDs like this:

• Red to pin 7
• Blue to pin 5
• White to pin 4

Circuit Working of Animal Scarer Solar Power Supply:

Parts List:

This circuit uses solar battery for power.

In daytime battery charges from sun through resistor R1 and diode D1.

Green LED turns ON to show charging.

At night sun goes down and solar power is low and D1 stops with reverse and D2 starts with forward.

Power comes from battery to circuit.

R1 stops too much current going to battery.

Big capacitor C1 stores small current and gives smooth power to circuit.

How to Build:

Below mentioned are the steps to build a Animal Scarer Solar Power Supply Circuit:

• Connect solar panel positive to battery positive.
• Connect solar panel negative to D1 anode positive side.
• Connect D2 cathode negative side to battery negative.
• Connect D1 cathode to battery positive.
• Connect D2 anode to circuit positive where load is.
• Connect D1 cathode to LED anode.
• Connect LED cathode to battery negative.
• Connect one side of resistor R1 to solar panel positive.
• Connect other side of R1 to D1 anode.
• Connect capacitor C1 positive to D1 anode.
• Connect other side of C1 to battery negative.

Conclusion:

This Solar Powered Animal Scarer Circuit is good to stop animals.

It does not hurt animals but i uses light, sound, or special waves to scare them.

It gets power from sun with no need of electricity from wires.

It works by itself so it is safe and good for nature.

It helps protect farm, garden or house from animal damage in smart and clean way.

References:

Development of a solar powered bird repeller system with effective bird scarer sounds