FM transmitter and receiver circuits

[Hina_Rubab]

fm transmitter receiver circuits

hi .. can anyone give me simple circuits for FM modulation transmitter and demodulation receiver operated at short range and low power ... i have to submit it as a semester project for Analog Comm Systems

 

[vfone]

schematic bfr96

433MHz Data Transceiver

 

[boy_paksit]

fm transmitter and receiver+circuit

433MHz Data Transceiver

hi there, can i ask a circuit for my project? it is using rf transmission. My application would be, I will control a room divider or curtain using PC wirelessly. How can I do that? please help me... also include the source code in the PC side. TY...

 

[gdaporta]

bfr91 receiver ask 433.92mhz

433MHz Data Transceiver

hi vfone,

I have a few questions about your circuit, maybe you could asqed it to me:

Receiver Circuit:
1)- there's no especification for L1, do you have it?
2)- what is the better choice for IC1?
3)- what is the better choice for T1?
4)- the 2,2uH coil, it's a choke?

Transmitter Circuit:
1)- what is the better choice for T1?
2)- the 27nH coil, it's a choke?
3)- the 68nH coil, it's a choke?

Thanks a lot !

GuillerMo -->AR<--

 

[vfone]

bfr91 433mhz

This schematic is from an old Elektor magazine.
Receiver L1 is specified on the schematic to have 1.5 turns. Have to tune the value of L1 until the super-regenerative receiver frequency (left schematic) become 433.92MHz (the same frequency of the transmitter).
If I remember well IC1 is LM358.
Good choice for T1 is one of BFR series (BFR91 for RX and BFR96 for TX), but you can try any high frequency BJTs, with Ft greater than 1GHz.
The RX 2.2uH is a choke.
27nH on the TX is a choke but is part of the output matching circuit, together with L2-68nH.

 

[Veleshki]

Could you tell me which number of Elector is this project

 

[mariusb89]

What is the suplly voltage

 

[G0HZU]

Re: schematic bfr96

433MHz Data Transceiver

That looks to be an OOK transmitter/receiver rather than FM.