Share: share with facebook share with twitter

It is illegal to operate a radio transmitter without a license in most countries. This circuit is deliberately limited in power output but will provid...

more >>

I have used a pair of BC548 transistors in this circuit. Although not strictly RF transistors, they still give good results. ...

more >>

This circuit contains an IC but it looks like a 3-leaded transistor and that's why we have included it here.The IC is called a "Radio in a Chip" and i...

more >>

OK, no comments, simple and easy to build....

more >>

The transmitter is a very simple crystal oscillator. The heart of the circuit is the tuned circuit consisting of the primary of the transformer and a ...

more >>

Nearly all the components in the 4-transistor circuit are used for both transmitting and receiving. This makes it a very economical design. The freque...

more >>

This circuit is the simplest FM circuit you can get. It has no microphone but the coil is so MICROPHONIC that it will pick up noises in the room via v...

more >>

This circuit uses a TUNED CIRCUIT or TANK CIRCUIT to create the operating frequency. For best performance the circuit should be built on a PC board wi...

more >>

This design uses a "slug tuned coil" to set the frequency. This means the slug can be screwed in and out of the coil. This type of circuit does not of...

more >>

It has a range of 200 - 400 metres depending on the terrain and the flashing LED turns the circuit ON when it flashes. The circuit consumes 5mA when p...

more >>

This simple FM Transmitter is very powerful (mean its not simple one..! but its easy to make..). You can transmit FM signals up to 5km radius circle ...

more >>

FM transmitter uses 2 transistors 2n2222. If the fm transmitter is in use voltage supply of 9 volt battery and use an antenna length is less than 12 i...

more >>

Depending on how much chirp one is prepared to accept (there is quite a bit) the power output is around 50-70mW, which is enough to cross the Atlantic...

more >>

Crystal is 3560KHZ = 3.56MHZ ...

more >>