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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:

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

Circuit Working of Animal Repellent :

Parts List:

CategoryPart DescriptionQuantity
Resistors100Ω 1/4 watt3
1M 1/4 watt1
Potentiometer 100k2
CapacitorsCeramic 0.22µF1
SemiconductorsIC 40601
LDR1
LEDs 5mm 20mA9

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,

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

Duty cycle = T1 / T

where,

To stop LED burning use resistor:

RLED = (Vsupply – VLED) / ILED

where,

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 LEDs like this:

Circuit Working of Animal Scarer Solar Power Supply:

Parts List:

CategoryPart DescriptionQuantity
ResistorsR1 10Ω 1 watt1
R2 1k 1/4 watt1
CapacitorsElectrolytic 2200µF 12V1
SemiconductorsDiodes 1N40072
LED any 5mm 20mA1
Solar Panel 18V1
Battery 12V1

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:

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

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