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This sketch will read RF power and SWR from any SWR bridge, designed to work on VHF UHF bands

SWR / Wattmeter with Arduino Uno Shield. It can measure from 2 to 200 watt and SWR for HF Ham radio.

Power and SWR Meter with dual bargraphs and sticky bar, using 2x AD8307

Inline RF Power & VSWR Meter. A DIY meter 0 to 30 Watt with Average and Peak. Circuit Description, Arduino Nano software code and part list to DIY your own Digital SWR Meter

Homemade SWR PWR Meter based on Arduino

The circuit is based on two AD8307 log amplifiers, which are connected to the forward and reflected ports on a directional coupler

A low-cost SWR meter project based on Arduino that works with AutoCap automatic antenna tuner for magnetic loop antennas

Available worldwide can be used as Arduino Shield or plug it in to you PC , or with a bluetooth adapter connect to Android. With a highly optimized software, KAI200 brings you: a. Antenna analyzer form 1 up to 200 Mhz; b. WSPR transmiter (set up by serial terminal); c. Square Wave Signal generator KAI200 is all you need for your radio whatever it is Yaesu, Icom, Kenwood or Drake and DIY projects.