![]() Suggestionīut fear that it will not work. It is enough for the small and cheap circuit like this. So, it is difficult to determine how far?īut from my experience, in the center of the floor to the two floors of the building. Note:Īs a principle, this circuit sends far about 100 meters. By folding a sheet of aluminum or a plastic sheet is glued to the box for convenience to you. Then, install the circuit into a plastic box or aluminum box. Also, try turning the radio waves, may rotate to the minimum frequency and maximum frequency, or turn around the station. If all the fine-tuning does still not work. And try some stretching or shrinking the antenna, in order to deliver the best results. If tune the trimmer until full cycles, Not yet match wave. Tune until it has the sound to the FM radio. Use a screwdriver plastic or plastic sheet flat spin adjust the trimmer. Turn on the FM wireless transmitter circuit. Take the FM radio, open station radio dial in the middle. Use a lead solder a better mix of 60/40, and requires some skill in soldering. We use the coated copper wire for to prevent rust green from moisture in the air.Īt the end of the wire should scrape out with a razor blade before solder. This project you may use universal PCB or look at PCB layout on image below.Ĭreating an electronic project often has similar steps.Ĭonnect a shielded cable length about 5 cm to connect a condenser and the PCB. Then take one end soldered to the antenna connection. Which in this circuit, we use an antenna that is built with yourself.īy using the copper wire 16-20 AWG, about 7 inches in length, and curled into a circle like a spring, about 6 mm in diameter. While the collector of Q1 connects to the antenna. It is the adjustable capacitor from 5pF to 20pF. Then, stretching out to a length of 15 mm.Īt close, this coil has a capacitor-C4, 5-20pF. You should wrap 7 rounds, similar to coil spring. 19-20 AWG, wrapped around the air core diameter of 7 mm. ![]() It converts our sound signal into a radio signal so that it can be picked by every FM radio and television that is tuned at the same frequency. To set a level voltage to bias current of Q1.įor capacitor C2-0.01uF connects to the ground to bypass the high frequency.Īnd, collector of the Q1 connects with positive voltage pass the coil.įor this coil, we use a copper wire No. Simple FM Transmitter Circuit using Transistor Augby Sara Mukhtar 14,410 views In this DIY tutorial, we will discuss a simple FM transmitter. To mix the sound signal and the RF together.Īnd, at base of Q1 has both resistor R2-27K and R3-4.7K. RF Amplifier Module For FM HF VHF/UHF sale online store at wholesale price. We will see the R1-resistor 27K pass voltage to a positive leg of a microphone.Īt the same, this leg is its output, too. However the Simple Dipole Antenna that may be installed at the wall of the. To be a higher level before sending it to the output leg.įor this reason, this MIC requires a little current to power them. Inside it has an amplifier module to amplify our voice. It is special part called a condenser microphone. ![]()
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