كلم صاحبك وانت بعيد عنة :دائرة ارسال fm

هية دي دائرة ارسال fm عشان تقدر تكلمهم وهما بعيد عنك


المكونات
C1 0.001uf Disc Capacitor
C2 5.6pf Disc Capacitor
C3,C4 10uf Electrolytic Capacitor
C5 3-18pf Adjustable Cap
R1 270 Ohm 1/8W Resistor 270 Ohm 1/4W Resistor
R2,R5,R6 4.7k 1/8W Resistor 4.7K 1/4W Resistor
R3 10k 1/8W Resistor 10K 1/4W Resistor
R4 100k 1/8W Resistor 100K 1/4W Resistor
Q1, Q2 2N2222A NPN Transistor 2N3904, NTE123A
L1, L2 5 Turn Air Core Coil
MIC 1 Electret Microphone
MISC 9V Battery Snap, PC Board, Wire For Antenna



Notes



L1 and L2 are 5 turns of 28 AWG enamel coated magnet wire wound with a inside diameter of about 4mm. The inside of a ballpoint pen works well (the plastic tube that holds the ink). Remove the form after winding then install the coil on the circuit board, being careful not to bend it.

C5 is used for tuning. This transmitter operates on the normal broadcast frequencies (88-108MHz).

Q1 and Q2 can also be 2N3904 or something similar.

You can use 1/4 W resistors mounted vertically instead of 1/8 W resistors.

You may want to bypass the battery with a .01uf capacitor.

An antenna may not be required for operation


:tt>: .

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