The power detector are the one from the datasheet in the AD8307 manual on page 21. I got a lot of other projects thought up as well but I guess that not all of the are going to be realized.
In the future it might be evolve to a Pc or Android interface, But that depend on if i manage to get some better programming skills or if I can get help for the programming.
Transfer the code from Funduino UNO board to a Arduino mini board.Modifie the code to optimize the DAQ resolution.Test the code in an simulated environment by simulating the input voltage with an potmeter.Make the hardware for the power detector.The plan for this project is as following.
In the future it will probably be an full scale SWR monitor. The plan is to make an inline power monitor. Last weekend i started building a RF power detector with an AD 8307 log amp. I got the boards a few months ago but have not got started until now. I’m a Ham op LA9XNA and have just started with Arduino. I have a prototype in place and it is playing along with the arduino, currently showing dBm. My schematics is going to end up looking something like this. Future linarisation / calibration feature.Set up compensation for front connected attenuator probably by rotary encoder.Display power in W, mW, nW and possible pW.Digital display from Nokia 5110 (84×48).To be able to fit in a Hammond 1590 box.The main reason is because I introduced my project to the Lab group at LA1J ( LB1IF Tommy, LA8DTA Kjell Kristian, LA9XFA Eivind and LA3NO Jens).Īs we are 5 participants on the project without any specified design all of us are building variations of the same project.The only thing all of us got in common is that we are all using the AD8307 and Arduino.We are probably ending up to build totaly different projects. I decided to more or less start form scratch. The Daycounter for calculating the required inductance and calculate number of turns on the inductor.Ħ does also have a good calculator to reverse engineer the inductors in the schematics.Īs showed in the picture there are harmonics up to 21 order, the harmonics over 14 order are more or less neglectable.Īfter some time i have started on the power-meter project again. 0,202mm enameled cu wire. Secondary is 10-20% of primary. The output transformer will have to be an air-core transformer.Ĭ2: 45,5 pF 14MHz or 30,32 pF 21MHz. This might be a good oscillator for transverters all the way up to the 23cm band with a 2GHz transistor. The design of the multiplier gives a lot of harmonics all the way up to the 21 order at 294 MHz. This online electrical calculator allows you to calculate the toroid inductance value per turn. As toroid inductors have more number of turns it can carry more currents. Here is the schematics of the oscillator multiplier. Toroidal inductors are used where large inductance are required at low frequency levels.