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You have posted an incomplete schematic and asking a wrong question.
the circuit is a silly RF transmitter. You need to search for the receiver as well.
Post them both, and ask exactly what do you want to do with those...
Re: help me , how to connect rf encoder/decoder to this circ
hi thanks for reply
i am now posting the receiver for the above transmitter
SIR PLS WITH THIS TWO CIRCUITS THE TRANSMITTER AND RECEIVER JUST help
WHERE TO CONNECT THE rf encoder and decoder if we want to use that encoder/decoder with this 2 circuits
Re: help me , how to connect rf encoder/decoder to this circ
Saw it already two days ago. The question still makes no sense.
P.S.:
the shown circuits are a complete transmitter/receiver pair, operating at some unspecified radio frequency. They don't need nor have a connection option for additional circuits. The circuits as they are, can't be legally operated in any country. What you are trying to achieve?
Re: help me , how to connect rf encoder/decoder to this circ
Hi,
Since your circuit is a plain RF TX/RX system without any data modulation facility, I can only think of an ON/OFF FSK modulation of the RF.
You can replace the ON switch of the transmitter with a Transistor switch and apply your data to the transistor base to switch ON/OFF the transistor as per data, it is known as data keying. You should do it slowly, allowing time for the the transmitter oscillator to stabilise for each data bit applied.
On the receiver side, you remove the sound IC and replace it with a 4.7k resistor. You should see transmitted pulses at this point which can be given to your decoder. You have to see how to pick up your data bit corretly, unless your encoder/decoder has some facility like synchronising with a start bit and midbit data sampling etc. If the phase of the data is inverted, you can also remove the speaker and replace it with another 4.7k resistor, and use the correctr data from this collector.
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