$$broke_deuce
New Member
Am now about the build my fm transmitter and I have one question before i start. When building the fm transmitter do I need a custom PCB board or any one from RadioShack will do just fine?
Thanks
Thanks
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
audioguru said:I built my FM transmitter on Veroboard. I carefully planned the parts placement so each wire is less than 1cm long. It works fine.
Other guys said their transmitter didn't work. They had parts far apart all over the place.
See the difference, and mine had many more parts>
That's a good one!evoke said:found this schematic for a AM transmitter.could use it for sound power
It took me anout 1 minute to make my inductors and another minute to sand off the enamel at the ends. I don't think anyone sells inductors so simple and cheap. I just copied this one from another FM transmitter project:$$broke_deuce said:Audioguru,
I'm curious if you wound your own inductors or did you buy the exact inductances???
A battery doesn't oscillate. The voltage could jump around at an audio rate if the battery doesn't have a 100uF bypass capacitor across it and its voltage might jump around at 100MHz if it doesn't have a 1000pF ceramic disc capacitor across it.$$broke_deuce said:Tried building a transmitter but it isn't working. I'm out of ideas and stuck now. One thing I found out was that my 9 V battery is oscillating at 80-89 MHz, that must be why it doesn't work.
Of course it does. Many radio circuits need ceramic disc capacitors because they have very low inductance. Wirewound resistors are also inductors and cannot be used.Does it matter what kind of capacitors/resistors used?
Make it like mine. Use ceramic disc capacitors and very short wires. Another guy made a much simpler FM transmitter with its parts spread out and it didn't work. Here are pics for a comparison:If you have any tips please let me know.