DIY 2,4GHz Powermeter
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@ DB8TF thanks in advance .
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PA3AOD: fix:
first load the _1 file and let the powermeter boot up. (initalize eram variable)
then load the _2 file and from now on the ATT setting should be permanent stored in the internal eprom.
73s
Thanks for the excellent program. It works!
Is it possible to get the code? I would like to use I2C (A4 and A5 in Nano) which are blocked by your code.
This would give me a chance to use an oled display and send the results via raspi to my mqtt server.
In the moment I am using the nano, raspi mqtt system for different sensors (temperature, volt, ampere) to control my nokiia pa. This pa finally works very well with your help!!
73s Walter
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dj0abr: i use a cheap 30dB directional coupler from ebay with a additional 30dB att.
This way i can measure 10mW - 100W with that little meter
If you are interested in the code and the ciruit drop me a PN.
G0MJW: for the ref i use the 3,3V from the USB chip on the nano board.
The detector board has its own 7805 linear regulator.
I use one of the free ADCs to measure the battery voltage and when it drops below
7V (in my case) and the readings change because of low voltage then a "low bat" message is displayed.
Which of the ADC's are you using? If I got it right, it is not documented in the PM you attached. As I do believe within your program in the zip file the low battery function is included and needs the measurment of the battery power.
regards Walter
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in the chematic you can see:
Arduino Nano:
ADC0 AD8313 Vdet
ADC5 -20dBm set
ADC6 Ubat
Answers that your question?
Thanks! Of course you are right! My mistake was on my pcb. No connection between vin and 12K. Now it works! Excellent.
vy 73 Walter