As this monimatch type of bridge is frequency dependant the meter must be calibrated for every band.
Arduino rf power meter.
This is a project based on arduino board which can measure the power consumption of the devices.
Current ratio is proportional to the ratio squared.
Because my primary interest was for vhf uhf shf i have foreseen positions for 6m 4m 2m 70 cm 23cm and 13cm bands.
It consists of from left to right the 5v power supply the arduino nano the ad8317 module and a 2 24 character module.
When we connect this wattmeter on to a device which is in operation the 16 2 lcd displays its power consumption value in watts.
Has some new ads1100 files to support external i2c connected adss1100 16bit adc units from m5stack.
Using 10 1 turns would see 1 of the rf current at the reference resistor.
This sketch will readout rf power and swr from any swr bridge for example monimatch type.
Because my primary interest was for vhf uhf shf i have foreseen positions for 6m 4m 2m 70 cm 23cm and 13cm bands.
Main arduino code that runs on the m5stack with graphics and buttons.
As this monimatch type of bridge is frequency dependant the meter must be calibrated for every band.
The little arduino nano uses the forward and reverse dc voltages to calculate rf power and voltage standing wave ratio.
Rf power meter with 1mhz 10ghz bandwidth and 55db dynamic.
Arduino rf power swr meter.
Rf power meter default function calibration 10 and 40 dbm for each band stored in eeprom.
Rf power meter with arduino ad8307 and oled by rudi imbrechts on7ir january 2019.
In the arduino sketch i compensate for the loss in the rf tap by altering the intercept point used for the power calculation.
The project uses an arduino pro mini board whose adc feature is used along with the concept of ohm s law and voltage divider circuit to develop this wattmeter.
They work really well 0 12v inputs 15 bit useful range.
Some parts do need a serial resistor some.
For the 2 048 volt reference you can use every reference chip you like.
This figure is calculated from the power vs voltage slope of the ad8307.
This sketch will readout rf power and swr from any swr bridge for example monimatch type.
I have a 4 channel version module very similar to try out based on the ads1115.
