Too many lost sheeps in this world.
Here is the ultimate invention to keep your sheep in sight.
What's RF Sheep Tracker ?
It's a collar equipped to transmit a continuous signal so, when it's out of range, a buzzer alert sound is played on the receiver device.
But the collar can do more:
no sheeps were harmed during the testing of the RF Sheep Collar
Described features are obtained using:
RF 433MHz transmitter
RF 433MHz receiver
Lilypad RGB led
An accelerometer read motion status and send the information to Arduino Nano that manage it and, via RF transmitter, send continuously motion status to a receiver device.
If receiver device get signal means that the collar is "in range" and it shows only a blinking led . When receiver doesn't get incoming signal, an incremental buzzer alert sound can be listened.
When transmitter and receiver are "in range", if the information sent by the collar is "motion", a short buzzer sound can be listened on receiver device.
A button pressing on collar activates the "night mode". This means that the collar RGB Led glows and show, successively, sequential RGB colors and, when detect motion, a white blinking led alert glows instead of colors.
As you can see the concept is similar to Disco Dog . Differences are:
Disco Dog communicate via Bluetooth, RF Sheep Tracker via 433Mhz. This means more communication range for open spaces. The prototype made allow communication between transmitter and receiver around MAX 40 meters at open air . The range can be also reduced .