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Need help on an AM TRANSMITTER circuit or design having a carrier of 535Khz-1605Khz that can have a power of 10 to 100 mW and can use 9 to 12V of supply.
To display its frequency you will need to amplify/buffer the signal that is going to the antenna, devide it by 100 and use 4-digit frequency counter with, say, 0.1s time base at the gate. This can be designed using conventional TTL/CMOS circuits or a microcontroller.
Regards,
IanP
Any other circuits that is available?What about using XR2206 do u have a circuit for it that can be used in AM transmitter?I just want a simple circuit for me to understand how it works!
For XR2206 as AM modulator use FIG.12 of it's data sheet: **broken link removed**
and apply audio to pin 1 (input impedance ≈100kΩ) through a 1-10kΩ variable resistor.
The frequency display may be connected to the square wave output..
Regards,
IanP
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