This is a tracking transmitter.Normally we use these thing to track animals,Rc planes etc.The power of this one is about 3.7mA.This circuit can be operated by using 1.5V button cell.The operating frequency is FM 100Mhz .But if you want to use it between 108Mhz to 88Mhz you have to use Just spread the windings of the coil just a bit About 1/2 a millimeter .This is wonderful project. Have fun with this.
Note
#This is not long range one but you can get the maximum advantage
#supply 1.5 v
#Attach 12 inch antenna
#Search until mmmmh mmmmmh mmmmmh mmmmmh sound comes from your radio set
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