Radio Collar Transmitter

admin October 17, 2018 No Comments

Radio Collar Transmitter

Radio collars or tracking collars are tracking devices used to study animal migration patterns, they are also used to keep tab of endangered species. In India, radio collars are commonly used on tigers to keep track of them. Obviously, a radio collar has a strap which is worn around the neck of the animal and a radio transmitter. Our project here is to make such a radio transmitter device which can be used for tracking. We are using NE555 IC to simplify the circuit.

Description

This is the circuit diagram of a radio transmitter suitable for fitting on radio collars. The circuit transmits a pulse in the FM between band 88MHz to 105Mhz, which can be adjusted. The IC Ne 555 is wired as an astable multivibrator for producing the tone. L1, C3 and Q1 form the modulator. Q2 performs the final power amplification.

Notes

For the inductor make 5 turns of .5 mm dia insulated copper wire on a standard ball pen refill. Remove the refill and make a tap at the centre of the coil. To vary the transmission frequency try experimenting with a number of turns. Careful! whatever may be the no of turns the tap must be at centre. Use a 50 cm long insulated copper wire as an antenna.

Parts List

R1…………………………………. 10K

R2 …………………………………1 M Ohm

R3 ………………………………….330 Ohm

R4 …………………………………..1 M Ohm

R5……………………………………. 330 Ohm

R6 ……………………………………200 Ohm POT

C1 ……………………………………..0.1 uF Ceramic

C2…………………………………….. 0.01 uF Ceramic

C3…………………………………….. 13 pF Ceramic

C4 ,C5, C6,C5 ……………………..0.01 uF Ceramic

Q1 ,Q2 ………………………………..2N4392 JFET

D1 ……………………………………….1N 914 Diode

IC 1……………………………………… NE 555

Circuit Diagram.

 

radio collar transmitter circuit

We have more Radio Circuits that you may like to read:

1. AM Receiver Circuit

2. FM Radio Jammer

3. Mini FM Transmitter

4. Low Cost AM Radio

5. Simple AM Radio

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