hello i am totally new to arduino but have 40 years in mechanic engineering have been radio ham since 1992 this question may well have been asked before but here goes
1 a low variable DC voltage into arduino read system to turn stepper motor to obtain minimum voltage should correspond with lowest swr for tuned frequency i.e. MAG loop antenna
the voltage would be derived from the Tayloe QPR swr bridge using 3 50 ohm resistors small wound toroid an in4148 or similar diode led is normally used for best swr led goes out as antenna should be resonant 50 ohm best description i can write i want to tune the loop using stepper motor under automatic control any transmit would tune for minimum swr has anybody tried this and do they have code to share possible prog would be
read voltage =v on input pin?
turn stepper speed varies cw c cw while reading v if increase in v turn stepper c cw cw to read Min v on input pin?
as always there is never a stupid question
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