Semi-automatic HF Antenna Tuner Controlled by Arduino

ATU can tune a wire of virtually any length on all HF bands.

The coil bank, top view:
The coil bank, bottom view:
The capacitor bank, top view:
The capacitor bank, bottom view:
Video showing use of the ATU

ATU investigated by a thermo camera

Controlling board with Arduino
Coils bank
Capacitors bank
Band switching chain
Switching between C and L to tune (board on the front panel)

Arduino Nano controlling Software

PCB (for SprintLayout v. 5.0):


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