Hey.. Firstly thanks for replying to my help on previous thread. It did help me alot.
Next, i am sorry if the AM transmitter topic comes up again, i did search the forum and google on my own but the results are too many but i went through some which help my project alittle. i guess it would be faster and better to make this topic for help.
I am building a low power audio AM transmitter and receiver. Because my project require the transmitter and receiver to be as small as possible(mini/micro). It requires as little components as possible. operates on 3V-6V button cell battery. Range-wise: very short >1m. I have found this circuit(transmitter) to suit my project so far.
(Source :http://www.sciencebuddies.org/science-fair-projects/project_ideas/Elec_p024.shtml)
Help needed:
1) Tune frequency is at 1Mhz? How can i build the receiver as simple as it can to tune to 1Mhz and is the received audio clear/loud/distorted or i need an amplifier/?
2) By changing the Crystal Oscillator value, i am changing the tune frequency?
3) Anyway i am looking for alternative and better circuit idea so i hope you guys can suggest better ways as i describe above.
Thanks for any reply.
Next, i am sorry if the AM transmitter topic comes up again, i did search the forum and google on my own but the results are too many but i went through some which help my project alittle. i guess it would be faster and better to make this topic for help.
I am building a low power audio AM transmitter and receiver. Because my project require the transmitter and receiver to be as small as possible(mini/micro). It requires as little components as possible. operates on 3V-6V button cell battery. Range-wise: very short >1m. I have found this circuit(transmitter) to suit my project so far.
(Source :http://www.sciencebuddies.org/science-fair-projects/project_ideas/Elec_p024.shtml)
Help needed:
1) Tune frequency is at 1Mhz? How can i build the receiver as simple as it can to tune to 1Mhz and is the received audio clear/loud/distorted or i need an amplifier/?
2) By changing the Crystal Oscillator value, i am changing the tune frequency?
3) Anyway i am looking for alternative and better circuit idea so i hope you guys can suggest better ways as i describe above.
Thanks for any reply.
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