FM radio

Electronic Schematics > RF circuit > FM radio

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TECHNICAL CHARACTERISTICS:

Stabilised tendency of catering: Vcc=9~12V

Frequency of reception: 88~108MHz

Consumption: 100mA

Materially:

The resistances are 1/4W.

REGULATIONS:

A) With the P1 we regulate the intensity of sound.

B) With the P2 we regulate the frequency of reception.

C) Optionally: If you want to check the frequency with your PC it will be supposed you make the following energies:

- You assemble and the circuit that is in the blue frame.

- You cut the driver dj'pla in point A, as it appears in the circuit and you connect points A,V.

- If you know some language of planning as C ++, PASCAL, VISUAL BASIC, DELPHI etc you can write some program which will send in the parallel door (378 I) of PC a number from 0 until 255 checking thus the tendency of expense of simple D/A of converter (that it is in blue frame) and consequently and frequency of radio via passage VARICAP.

(As long as grows the number that sends in the parallel door, so much minimizes the frequency that receives the radio.)

Note:

Also check the conversation about this project at the community. Post you questions here.

Title: FM radio
electronic circuit
Source: www.electronics-lab.com
Published on: 2005-02-03
Reads: 2861
Print version:

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