RF Module

[shahidali55]

I finally found something on google that looks real easy to make.
Can someone tell me if these circuits will work and what range they might have?
http://www.cappels.org/dproj/LCRFLIN...tr/TRFxmtr.htm
http://www.cappels.org/dproj/LCRFLIN...rF/TRFrcvr.htm

[shahidali55]

Has anyone got any other ideas???
I just need a simple circuit that is capable of transmitting and recieving data.
Range - 25 to 30 metres...
Frequency - Anything . . .

[dhouston]

I just remembered this one.

• http://www.piclist.com/techref/io/rf/simpletx.htm

[Melanie]

Shahidali, as you seem to want to build one yourself instead of buying ready made devices, the final result and performance will very much depend on your build quality and the quality of components you use and the antenna you employ at both the transmitter and receiver and also the frequency you end up operating on. Since the inductor will be constructed by you, I emphasise build quality. So, why not try building some of the many circuits you now have acquired (including some you've found yourself), then come back and tell us how you've done and how well they have performed. However, without some good test equipment, or alternatively at least a tuneable receiver in the frequency band of your transmitter, you will have a hard time achieving a measure of success whilst working in the dark, as you won't even know what transmit frequency your construction has ended up with.

[Acetronics2]

A link to visit : http://www-k.ext.ti.com/srvs/cgi-bin/webcgi.exe?Company={5761bcd8-11f5-4e08-84e0-8167176a4ed9},kb=analog,case=obj(4270),new

Alain

[shahidali55]

Does anyone know any replacement for MPSH34 transistor ???
It should have very low capacitance...

[amindzo]

Hi,
it's really hard to make a RF transmitter and reciever . it's need a lot of experience. i think the best way is using modules, for example U2741B and U3741BM from atmel or you can use TXC1 and RXD1 from keymark company.(TXc1 and RXD1 are ready made devices). In your frequency(433.92MHZ), you should use SMD devices.
if you need more information ask me again.