This transmitter circuit is a miniature medium wave (MW) transmitter. It's a very simple, inexpensive and interesting project which provides lot of fun to a home experimenter or hobbyist. This simple transmitter can transmit speeches or songs within a short range. The MW transmitter circuit uses only one transistor. The entire circuit can be easily assembled on a prototyping printed circuit board. After assembling all the components properly put the whole assembly in a plastic enclosur [...]
A small FM voice transmitter for Band 2 VHF. This fm transmitter circuit is simple, output frequency tuned by regulating on coil (L) that parallel with 15pf capacitor. Supply voltage needed for operate this circuit is 9 volt. This small transmitter uses a hartley type oscillator. Normally the capacitor in the tank circuit would connect at the base of the transistor, but at VHF the base emitter capacitance of the transistor acts as a short circuit, so in effect, it still is. The coil is [...]
This simple circuit allows you to transmit audio signals over an area of about 100 meters radio. The signal emitted by this FM transmitter can be tuned anywhere in the Dial your FM radio, because their frequency of transmission can be easily located between the 88 and 108MHz.Its uses of the fm transmitter are unlimited, can be used as a monitor for babies, such as wireless microphone for conferences, to transmit the audio from a PC to another point of the house.The miniature FM transmi [...]
With this simple VHF FM transmitter you could play audio files from an MP3 player or computer on a standard VHF FM radio. The circuit use no coils that have to be wound. This FM transmitter can be used to listen to your own music throughout your home. When this FM transmitter used in the car, there is no need for a separate input to the car stereo to play back the music files from your MP3 player. This FM transmitter uses a chip made by Maxim Integrated Products, the MAX2606  To kee [...]
Here's simple FM transmitter circuit using transistor 2N2218. Micropohone is a microphone of electret of two terminals and the antenna should possess from 15 to 40 cm. Below is schematic circuit of the fm transmitter Printed Circuit Board (PCB) and Component Layout of the fm tranmitter Parts List of the fm transmitter Resistors R1 = 2,2 kO R2 = 4,7kO R3=5,6kO R4 = 47O Ceramic Capacitors C1=4,7 nF C2=2,2 nF C3 = 4.7pF C4 = 100 nF C5 = TRIMMER CV 3-30 PF. Transistor: T1 = 2n2218 or equiv [...]
The FM telephone circuit is built on a PC board that is so small it can easily be fitted inside the housing of a telephone making it an instant pseudo-speak earphone. Here's the FM telephone transmitter circuit : This FM circuit connects in series with telephone line, steals power from it, and transmit at both sides of the conversation to an FM radio tuned between 90 and 95 MHz. FM Telephone Transmitter in Detail.
How to build and improve rf transmitter AM-FM-TV Transmitter