Ashhar Farhan. Thanks for this perspective. I think I sort-of did what you are suggesting. I first played with the capacitances to get the in-band impedance as consistent as I could (not at 50 ohms, j

#filters #ssb

I just made my first Crystal ladder filter. I started with the 12Mhz filter from the uBitx V4 (including impedance transformers). At first, the impedances were off, but after playing with the capacito

#filters #ssb

Make sure the backlight is at 100%. A PWM signal controls the brightness and I get noise on mine when at anything other than 100%

Turns out that the Band-Scan works differently that what I posted earlier. Here is what is does - for both the Band-Scan and Spectrum screens Nextion sends the scan request to the CEC Raduino asking f

I actually totally re-did the FFT part of the code and made a number of other improvements. The original FFT code had an odd bin size, so there was a progressive frequency offset from the FFT display

I think this function does not use the Nano FFT (I have been in the code a lot for the Nano FFT, and it only kicks in for CW decode to the ~ 3KHz spectrum display). For the band scan, I think what it

Great tip, thanks. I choose a different color, but I also found that changing the font to Arial Black helps too.

R5 is 2.2K

I haven't started yet, so no schematic yet

I haven't begun it yet, but one of my thoughts is to output the frequency via a NRF24L01 so it can be received at a companion unit to drive a tuner. I was thinking a stepper motor on a capacitor for a

The wiring diagram looks incorrect to me. I put the forward/reverse power to the second Arduino. I seem to recall seeing an updated wiring diagram at one point, but I cant find it now. The way the Ham

With all this, I think what I did will be a better base for the second Arduino code as Dr. Lee's version has very little available memory left. You could also look at some thing more powerful that an

I have not use a LM358 so I cant say what the advantages are. I just Used what I had on-hand. A quick peek at the data sheet and it seems like it should work as a replacement. I think the key feature

The audio equalizer sounds really interesting. If you pursue it I'd really like to follow what you do. One of reasons I revamped the Smeter firmware was to make room in the program for additional feat

You might be interested in my project. I have created a major revision to Dr. Lee's standalone I2C with a bunch of enhancements, including a way to calibrate the power/swr meter. Included is my tweake

Are you using the second Arduino for the SMeter? If so, then the speed is based on how the code is written and the communication mechanism with the Nextion. I have replacement firmware for the second

There is not enough information here to give any answers. It may help if you details of exactly which UBITx board, which s-meter solution , and which firmware, you are using. Include versions of softw

Give it a try. It should work fine on 3.5. It just won't use the whole screen.

#arduino #fft #firmware #nextion #smeter

Here is something I want to share with the community. I have done quite a bit of work on the standalone S-Meter from KD8CEC. The functionality Dr. Lee has provided in his firmware is fabulous, and thi

#arduino #fft #firmware #nextion #smeter

Thanks Evan, it was pretty close to my 2 meter antenna at the time. To be sure I understand, do you mean a total of 4 diodes? so that the line is constrained to be only +/- approx 1.3V

#ubitxv6 #ubitx-help #tx