27Mhz or 40Mhz Tranmitter & Receiver Circuit

S

Thread Starter

surajddk

Joined Jan 3, 2011

9

Feb 24, 2011

• #1

I need a Transmitter & Receiver circuit which can use for broadcast DTMF signals over a certain frequency (eg. 27Mhz or 40Mhz) in FM Band. I have found good circuit which can use for same purpose. But it is hard to find FM RX module in my country.

 

blueroomelectronics

Joined Jul 22, 2007

1,757

Feb 24, 2011

• #2

What country would that be?

 

S

Thread Starter

surajddk

Joined Jan 3, 2011

9

Feb 24, 2011

• #3

blueroomelectronics said:

What country would that be?

Click to expand...

am frm Sri Lanka

 

Last edited: Feb 25, 2011

J

jpanhalt

Joined Jan 18, 2008

11,087

Feb 25, 2011

• #4

Is your question for this forum or for that forum? Please post the image of your circuit locally. I don't intend to join that forum just to see your question here.

John

 

S

Thread Starter

surajddk

Joined Jan 3, 2011

9

Feb 25, 2011

• #5

This is the circuit,

 

S

Thread Starter

surajddk

Joined Jan 3, 2011

9

Feb 26, 2011

• #6

Can I use a FM Radio instead of FM RX?

 

bertus

Joined Apr 5, 2008

22,985

Feb 26, 2011

• #7

Hello,

An FM radio is a FM RX (RX stand for RECIEVER).
It may be nessasary to adapt the output levels of the reciever to the controller.
(this KT3170,Look in the datasheet for more info on this).

Bertus