It is a HF band pass filter controlled by Arduino. It is designed for HF receivers. With this project, you can use a set of up to four HF bandpass filters that can be selected by Arduino. To do that ...

One such project came to our attention recently, the Minima, an all-band HF SSB transceiver ... and no doubt with some kit suppliers producing PCBs and kits. We think this can only be a good ...

This project interface LPF, HPF and T/R Switch to the radiobery I/O over i2c. The logic is arduino nano v3 based microcontroller. Band pass filters module supported ...