Arduino soft switch for relay board control This is a very simple "One Button" switch project created with an Arduino Nano and a 0.96 inch two color OLED display in order to condrol an HF Preselector BPF (Band Pass Filter) Board produced by SV1AFN (https://www.sv1afn.com/ham_band_presel.html) that is being used by me in a RTL2832 DVB-T dongle SDR (Software Defined Radio).

I also made an alternative very simplistic sketch for Antenna control through the same Single Push Button concept.

For more info and connection data read inside the sketches and consult the attached files. The project is published in Greek language at the Jul-Aug issue of the on-line electronics magazine SV-QRP.