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i have a remote control car but i only have the reciever unit and not the transmitter and the point of the project that i am working on at them moment is that i am not allowed to use anything that cannot be found in my house. so i need a working circuit schematic :)
thanx E
Forget it ! . There is no realistic chance of you finding the components necessary to build such a piece of equipment from the stuff you find around a house. . Even if you cannibalized good functional electronic equipment to get the components you are highly unlikely to find the full range of bits you would need - especially not the quartz crystals cut to the appropriate resonant frequencies. . Even if you did find all the components with the correct "nominal values" you would not be able to set it up to function properly without a range of specialized test equipment to tune and align the circuits and adjust bias levels and harmonic traps to prevent spurious emissions. . Furthermore, if you were to build and operate such home made equipment and it did generate spurious emissions, or radiate excessive power, thus causing interference to other licensed services - it would be an offence in law and you could be prosecuted. . If you are really interested in such projects, I suggest you attend courses in radio & electronic engineering - and after two or three years of serious study, you may be approaching the level of understanding necessary to design such equipment yourself, and to have amassed the test gear to set it up legally when it has been constructed. .
you make a good point but may i point a few things out ...
i do have the majority of the components as i have vast supplies of them as i am studying electronic engineering.
i have R.F probes and oscilloscopes and other things to test the circuits with ...
i have a matching set of crystals and there if it were to transmit on the 27 Mhz bandwidth it is leagal to operate up to a 5 watt transmitter.
i was asking for a working design ... if i wanted to make one myself i would wait until i have completed my course.
E
Not that there is anything wrong with designing and building your own transmitter but 27MHZ band remote controls are plentiful and cheap at any hobby shop. A lot of Interference is generated in that band.How about designing things that work at 5GHZ or higher where there is much less activity and few detectors of that high a band.
5 W ? ? ..... Try telling that to Ofcom. In fact the maximum permissible effective radiated power is only 2% of that at 100 mW. See the table at: http://funadvice.com/r/bi9tb9nu0n9
well i know many people who use 5 watt transmitters and they have never gotten into trouble so ...
E
i forgot to put it in :(
E
Now it's a question.
