http://www.8051projects.net/ Learn to make simple microcontroller projects, pic, 8051, avr and arm projects. download 8051 projects, tutorials, libraries, sample codes. join the microcontroller discussion forum and ask doubts regarding electronics. the best source for 8051 over internet. en-gb 2009-01-08T10:49:58-08:00 contact@nospam.com hourly 1 2000-01-01T12:00+00:00 http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 HERE IS Good quality sensitive FM transmitter .i have tasted it it gives awesome result http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 abbas1707 where it is http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 Ajay i cant see either... http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 ۞ TPS ۞ oops here it is http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 Junied Hellow to every one yea i have also tested this transmitter this works good,but basic problem with this transmitter is the range and the sound quality which is not up to the mark if some body is really interested in making good FM transmitter go for 4 Watt FM transmitter. After making this transmitter u will feel like u have made something its like a small radio station with a huge range of 50 KM in open space http://www.electronics-lab.com/projects/rf/001/index.html http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 ۞ TPS ۞ do u know source of silver coated wire (Gauge?0 also RFC1=RFC2=RFC3= VK200 RFC tsokTR1 = TR2 = 2N2219 NPNTR3 = 2N3553 NPN http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 Junied TR2 2N2222 or 2N2219 or BC337-25 NPN transistor TR3 2N3553 or 2N3924 or BFS22A No need of using silver coated wires our simple copper wires with the given diameter, can be used. choke VK200 can be obtained from a Radio shopor http://www.rfparts.com/choke.html if u do not get this component dont worryRFC is a radio frequency choke it is a circuit element designed to present a high impedance to radio frequency energy while offering minimal resistance to direct current. RFCs are frequently used in series with power supply leads both to keep RF from coupling via undesired power supply paths and to prevent power supply components from paralleling undesired impedances across the RF circuit.so if u want to avoid this in your circuit u can.I hope it will be usefull. http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 ۞ TPS ۞ ya somewhere i saw a site where they suggested to make VK200 RFC option http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 Junied but i dont think they would have given this explanation behind their suggestion http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 ADG3699 Hey guys, my name is Andy. I have tried to build that transmitter and I think I need a little help as it's my first project. The 9v battery at the top, I can't understand where the 2 wires should go ? Has anyone actually built one of these ? If so can you pleassseeee please e-mail any photo(s) to me at NORRIE3699@HOTMAIL.COM I'd really really appreciate it thankyou ! http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 ۞ TPS ۞ hi Andy I think you do not understand where to connect + and - of 9 v battery as you can see +ve terminal of 9v battery to be connected on top red point as mentioned +9v and -ve terminal to be connected to ground of circuit ie below R5 (100 ohms) i also suggest you to please gain some knowledge about circuit symbols you can visit following site http://www.kpsec.freeuk.com/symbol.htm http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 ADG3699 hey guys, if anyone is willing to help me further with building fm transmitters I'd really appreciate your help. If you can e-mail me at NORRIE3699@HOTMAIL.COM I'd really appreciate it. If you have built them already that would be a great help...I might even pay you for building and sending me one with the plans ! http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 ۞ TPS ۞ Another simplest transmitter http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 Ajay this one is awesome.. you are great TPS http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 ۞ TPS ۞ Thanks Ajay http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 ۞ TPS ۞ ANOTHER TASTED OK FM TRANSMITTER WITH PCB http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 Ajay host your picture on imageshack.usthey are much better.. http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 ۞ TPS ۞ IS there is any problem in viewing pictures http://www.8051projects.net/forum-t2877.html 2009-01-08T10:49:58-08:00 ۞ TPS ۞ another tested okPart Total Qty. Description SubstitutionsC1 - 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 ResistorR2,R5,R6 - 4.7k 1/8W Resistor 4.7K 1/4W ResistorR3 - 10k 1/8W Resistor 10K 1/4W ResistorR4 - 100k 1/8W Resistor 100K 1/4W ResistorQ1, Q2 - 2N2222A NPN Transistor 2N3904, NTE123AL1, L2 - 5 Turn Air Core Coil MIC - Electret Microphone MISC - 9V Battery Snap, PC Board, Wire For Antenna