pingguo
New Member
The first post in this forum that ask for help from everyone. I have two ATMEGA328P's. I would like to be able to send a radio wave (no data/sound/modulation, nothing, just the carrier wave) from one micro-controller and get the other micro-controller to pick it up using ADC.
So far I've been able to pick up random EMP emission with my receiver ATMEGA328Phttp://www.kynix.com/Detail/551814/ATMEGA328P.html (by connecting a long wire into the ADC input). I can clearly see a unique ~6sec pattern being generated by one of the devices at my home, then it goes silent for ~5seconds and then the pattern repeats again. Seems like it's coming from the fridge or maybe neighbors, because pattern disappears as I move further away from the kitchen. So my 'antenna' is picking 'something' up.
Now I want to be able to simply generate some kind of EMP emission, that could be picked up with my receiver, but this is where I'm stuck.
I don't seem to understand how can I 'send' the wave out from the transmitter. If I simply connect the crystal (16mhz) to the ground and VCC and connect another wire (antenna) to the crystals GND pin, but nothing happens as my setup is wrong. I see that other crystals used in radio tutorials have 4 pins, one of them is antenna, so I believe I need to wire 2 pinned crystal differently?
As far as I understood, this is how the transmitter should work:
Crystal is used to generate sine wave, which in return causes the polarity on the wire/antenna to toggle, which in return produces EMP emission in the frequency of 16Mhz (in my case), this signal then get amplified. Is this correct?
My questions are:
-Crystal value/pin count - Can I use a two pinned 16Mhz crystal to generate a 16Mhz SIN wave and will I be able to pick it up with the other ATMEGA's ADC? ( I don't want to read/process the signal, I just want to be able to read it with ADC and detect it's presence )
-Antenna - I have a WIFI antenna, as far as I understood, I won't be able to use it to pick up 16Mhz frequency since it works in Ghz range, correct? How would I find out the requirements to make an antenna that would pick up this frequency (16Mhz)?
-Signal - If I'm sending a 16Mhz sin wave and my micro-controller is running at 8Mhz, it means that I won't be able to see the 'detailed sine wave', but it would appear as solid 'high' in the listener, correct?
PS: Is there a different term for 'radio wave transmission'? because all the tutorials I come across are AM/FM radio related, while I simply want to generate a 'carrier wave' that can be picked up by another controller.
Thank you for your time,thanks all advices.
So far I've been able to pick up random EMP emission with my receiver ATMEGA328Phttp://www.kynix.com/Detail/551814/ATMEGA328P.html (by connecting a long wire into the ADC input). I can clearly see a unique ~6sec pattern being generated by one of the devices at my home, then it goes silent for ~5seconds and then the pattern repeats again. Seems like it's coming from the fridge or maybe neighbors, because pattern disappears as I move further away from the kitchen. So my 'antenna' is picking 'something' up.
Now I want to be able to simply generate some kind of EMP emission, that could be picked up with my receiver, but this is where I'm stuck.
I don't seem to understand how can I 'send' the wave out from the transmitter. If I simply connect the crystal (16mhz) to the ground and VCC and connect another wire (antenna) to the crystals GND pin, but nothing happens as my setup is wrong. I see that other crystals used in radio tutorials have 4 pins, one of them is antenna, so I believe I need to wire 2 pinned crystal differently?
As far as I understood, this is how the transmitter should work:
Crystal is used to generate sine wave, which in return causes the polarity on the wire/antenna to toggle, which in return produces EMP emission in the frequency of 16Mhz (in my case), this signal then get amplified. Is this correct?
My questions are:
-Crystal value/pin count - Can I use a two pinned 16Mhz crystal to generate a 16Mhz SIN wave and will I be able to pick it up with the other ATMEGA's ADC? ( I don't want to read/process the signal, I just want to be able to read it with ADC and detect it's presence )
-Antenna - I have a WIFI antenna, as far as I understood, I won't be able to use it to pick up 16Mhz frequency since it works in Ghz range, correct? How would I find out the requirements to make an antenna that would pick up this frequency (16Mhz)?
-Signal - If I'm sending a 16Mhz sin wave and my micro-controller is running at 8Mhz, it means that I won't be able to see the 'detailed sine wave', but it would appear as solid 'high' in the listener, correct?
PS: Is there a different term for 'radio wave transmission'? because all the tutorials I come across are AM/FM radio related, while I simply want to generate a 'carrier wave' that can be picked up by another controller.
Thank you for your time,thanks all advices.