bahari

 This is my projects setup. I'm adding RX amplifier, programmable step attenuator, low pass filter and LM386 speaker amplifier hardware. I'm also editing the existing code to include a...

> Very cool, really like the step attenuator. How are you controlling it? Basically the relay controlling 3 attenuator base value which is 3, 5, and 10dB. From the combinations...

Attached are the code. Effected code are ui.h, ui.cpp, rx.h and rx.cpp. Yeah using i2c is the right choice to control it. [code-atten-cntrl.zip](https://github.com/user-attachments/files/17292027/code-atten-cntrl.zip)

> > Attached are the code. Effected code are ui.h, ui.cpp, rx.h and rx.cpp. Yeah using i2c is the right choice to control it. [code-atten-cntrl.zip](https://github.com/user-attachments/files/17292027/code-atten-cntrl.zip) > > Thanks! I got...

> > > Basically the relay controlling 3 attenuator base value which is 3, 5, and 10dB. From the combinations of this 3 value I can get an extra 10,...

Thanks for the information, I'm really appreciate it. Is it possible to improvise the code to include a noise ratio option so that we can reduce the background noise? or...

Basically I compare the receiving noise with my home brew USDX based radio with the same antenna setup. For my existing home brew rig the background noise are not as...

> Do they have the same front ends ? same mux, same opamp ? It would be an interesting comparison to use the frontend from the USDX with the pico...

I'm very interested with PicoRX projects since it's not using external local oscillator for Tayloe detector. I hope I can build a transmitter with the same design without using external...

> I wonder if the usdx values might give a bandwidth that is too narrow? I think that 82k and 1nF give a bandwidth of about 2kHz, but the Pico...