I bought a cheap arduino from china off ebay for £1 including postage. I want to build an antenna analyzer with it.
first I would like to make sure it does all the things it says it does or supposed to do. like the adc, how would I test that. just to make sure that it works properly.
im new to microcontrollers and this cheap one is a good option for my project but I don't know how to test it for all of its functions. I need the adc to turn the analog waveform in to digital for measurement. im not sure what to do about that. I suppose a voltage meter project but I don't know what the limits are and how to test them. I know that a 10bit adc has 1024 values. what ever that means. the max pin current is 40mA, im not sure if I can use this for measuring a reflected wave?
I want to generate a sine wave with the ad9850 module, send that through an swr bridge to the antenna. the reflected wave will go back through the swr and should provide voltage and current that have a phase difference if impedance is not 50 ohm resistive. and if im right the ratio of voltage to current should give the impedance?
that's the idea, its still in research mode. but testing the arduino to give and receive correct signals and measurements. that's what I have to find out. so any advice on that would be great
thanks
simon
first I would like to make sure it does all the things it says it does or supposed to do. like the adc, how would I test that. just to make sure that it works properly.
im new to microcontrollers and this cheap one is a good option for my project but I don't know how to test it for all of its functions. I need the adc to turn the analog waveform in to digital for measurement. im not sure what to do about that. I suppose a voltage meter project but I don't know what the limits are and how to test them. I know that a 10bit adc has 1024 values. what ever that means. the max pin current is 40mA, im not sure if I can use this for measuring a reflected wave?
I want to generate a sine wave with the ad9850 module, send that through an swr bridge to the antenna. the reflected wave will go back through the swr and should provide voltage and current that have a phase difference if impedance is not 50 ohm resistive. and if im right the ratio of voltage to current should give the impedance?
that's the idea, its still in research mode. but testing the arduino to give and receive correct signals and measurements. that's what I have to find out. so any advice on that would be great
thanks
simon