Better Bird Scarer (Repeller) Project
by T.K. Hareendran in Audio |
Every hobby gardener often think some form of bird-scarer (repeller) can be helpful at certain times of the year to protect the crops. Don’t worry — I am not planning to reinvent the traditional scarecrow stuffed with straw, usually found in the middle of a farmer’s field to protect fruits and vegetables. But then here is an...
Automatic Pest Repellent
by T.K. Hareendran in Tested | Useful |
Automatic Pest Repellent is a non-chemical, clean, harmless and effective solution to unwanted pests. The circuit described here is nothing but a passive infrared (PIR) motion sensor activated water spray to deter animals from your lawn and/or garden. Needless to say, this system is ideal for repelling deer, dogs, raccoons,...
Electronic Mosquito Repellent Circuit
by P. Marian in Audio | DIY |
This electronic mosquito repellent circuit is easy to build but is kind of hard to adjust on the exact sound frequency which will reppel the mosquitoes. With frequencies between 2 KHz and 2.5 KHz which mimic male mosquitoes buzz, it seems you can get the best effect. Mosquitoes Repellent Circuit Diagram But sometimes you may...
Solar Powered Animal Scarer
by P. Marian in DIY | Solar |
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...
Electronic Dog Repellent Circuit
by P. Marian in 555 | DIY |
The electronic dog repeller circuit produces a discomforting but not harmful, high frequency sound, audible to dogs but not to humans. Help stop the approach of unwanted dogs at up to 15 feet. It uses 555 circuit at is easy to build, this is a dog chaser schematic that you can do it yourself. From R3 adjust the resonance...
Electronic Mouse Repellent Circuit
by P. Marian in Various |
This electronic mouse repellent circuit was designed because most people agree that rats and mice are not welcome in our houses, meantime some of us don’t want to hurt this tiny and “beautiful” creatures. Using a CMOS 4047 IC that is connected in such a way that it can function as an relax oscillator to...
Electronic Pest Repellent Circuit
by P. Marian in Audio |
There are many ultrasonic pest repellent devices available on the market but a major drawback is that their power output is low and their effectiveness suffers. This electronic pest repellent generates powerful ultrasonic signals to repel pests. In addition to the ultrasonic frequency oscillator built with the CD4047 IC,...
Dog Repellent Project Circuit
by P. Marian in 555 | Audio | DIY |
The electronic dog repellent circuit diagram below is a high output ultrasonic transmitter which is primarily intended to act as a dog and cat repeller, which can be used individuals to act as a deterrent against some animals. It should NOT be relied upon as a defence against aggressive dogs but it may help distract them or...
Electronic Mice Repellent Circuit
by P. Marian in 555 | DIY |
This electronic mice repellent emit high frequency sound waves to create an acoustically hostile environment that effectively repels rodents from protected areas. Sound is inaudible to people and non-rodent pets. It is ideal for environments were the use of poisons is inadvisable or prohibited. It is known that a mice can hear...
Ultrasonic Dog Repeller Circuit
by P. Marian in 555 | DIY | Tested |
This ultrasonic dog repeller circuit will chase away angry dogs. It is build with the all known 555 circuit, a buzzer and a little ferrite transformator. The ultrasonic frequency must be set with a dog nearby. Dog Repeller Schematic no 1 Circuit number 1 uses the well known NE555 IC, couple of components and a EE15 ferrite...