Module # 110 Front Panel - MAX-SSB Transceiver Project - First Power Up

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Schematic:
www.remmepark.com/circuit6040/...
Arduino sketch:
www.remmepark.com/circuit6040/...
I just finished designing and building this Arduino (Mega 2560) powered front panel controller breadboard for my "MAX-SSB (homebrew SSB) transceiver and wanted to share what I have completed so far. This controller drives an Si5351 PLL board to provide the VFO and BFO oscillators for my homebrew RF deck based on the famous BITX design by OM Ashhar Farhan (VU2ESE) using TIA IF amps by Wes (W7ZOI). This controller is an updated version of the one I developed for my earlier ZX-SSB project, but has several improvements such as the use of a mini clone version of the Arduino Mega 2560, the use of thermistors (instead of 1N4148 diodes) to sense the temperature of the PA's final transistors, and an on board GPS linked frequency counter which can be used to precisely set the Si5351's main crystal clock calibration, a GPS real time clock showing local and UTC time, S-Meter, High and Low inject L.O. switching on the fly, et cetera. The "MAX" in the project name = [M]odular [A]mateur radio e[X]perimental. This was just a preview of the MAX-Project homebrew SSB transceiver series -- More to come... 73 Rick N3FJZ
Mini Mega 2560 clone:
protosupplies.com/product/meg...
www.amazon.com/EC-Buying-Deve...
Display:
protosupplies.com/product/tft...
www.amazon.com/Hosyond-Displa...
GPS:
www.amazon.com/Comimark-Modul...
Frequency counter register :
www.mouser.com/ProductDetail/...

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Опубликовано:

1 мар 2024

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Комментарии : 15

@gheorgheberlogea9735 4 месяца назад

congratulations for the project, I made it and now it goes to reception from 2020. I'm looking forward to the new changes

@Circuit6040 4 месяца назад

Awesome! Thank you!

@paultomlinson528 4 месяца назад

Brilliant work!!!

@Circuit6040 4 месяца назад

Thank you!

@deanhutsell3144 4 месяца назад

Beautiful work Rick!! Now that's homebrew!! keep up the good work!...73 de Dean AC9JQ

@Circuit6040 4 месяца назад

Thank you Dean.

@antaf56 Месяц назад

Hi Rick, I would like to know if you have configured the GPS UBLOX module in order to generate the PPS even when there is no fix . Many thanks, Antonio (IW0FCI)

@Circuit6040 Месяц назад

antaf56, No, the (hardware) 1 PPS pulse (that gates the frequency counter and generates the interrupt to the Arduino) is only generated when there is a solid fix on the satellite(s); however, te NMEA sentence serial data is output even without a fix. When the Arduino is first powered on, it sends commands to the GPS module. I got the idea from videos created by iforce2d ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-q4ZA6KtYGRg.html and ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ylxwOg2pXrc.html

@andyhunter5191 4 месяца назад

Fantastic work on the VFO and controller, looking forward to seeing the software code for this. Looks like you are using an ILI9431 display? Have you thought about using the ILI9488 this is a higher res so sharper display and available in 4 inch. Thanks for sharing your development work & all the best. Andy G6LBQ

@Circuit6040 4 месяца назад

Thanks for the tip on the ILI9488 display Andy. It will definitely be on my to-do list for the next upgrade. I'm still working on putting the final touches on the newest revision of the code, but it is essentially 99% the same code as was used on the ZX-SSB front panel here: www.remmepark.com/circuit6040/ZX-SSB-II-Front-Panel/ZX-SSB-II-Front-Panel.html using the schematic here: www.remmepark.com/circuit6040/ZX-SSB-II/zx_ssb_ii.html The ZX-SSB project is deprecated and not recommended for new builds but it should work fine (see the special instructions for loading some custom libraries and font files) The changes to the new project include reassignment of GPIO pins, the use of thermistors to measure the PA final transistor temperatures (instead of diodes) and a bunch of other very minor changes that I can't remember :-) Please forgive my unruly code (15 thousand lines), When I think of a new feature I just start typing and just can't stop, but I try to put in a lot of comments to help remind myself what I was thinking when I coded a particular feature. 73 for now Rick N3FJZ BTW - I also have a bad habit of not removing code for features I take out or change, I just comment out the old and leave it in place 🙂

@stevec5000 Месяц назад

What are the 2 flashing red lights on the display right under UTC?

@Circuit6040 Месяц назад

stevec5000, each flash of these red indicators indicates that the NMEA sentence from the GPS module was successfully decoded. The NMEA sentence is where the MAX-SSB front panel gets the time. There are two indicators in this video, but each do the same thing, I was just testing two ways of flashing the indicators, in the final release there is just one indicator. Having a red indicator on the LCD screen saved me from having to have yet another LED in hardware. 73 Rick N3FJZ

@user-1166 15 дней назад

Hi, you did a great job. But does this device only support SSB? Doesn't it support CW\AM\FM?

@Circuit6040 15 дней назад

Hello user-1166, thank you for the complement. No, it's was designed for SSB based on my understanding of how SSB works. Because of the stability of the Si5351 VFO/BFO it can receive AM if tuned precisely, but there are no provisions for transmitting on AM or other non-SSB modes. 73 - Rick - N3FJZ

@user-1166 15 дней назад

@@Circuit6040 Thanks for your reply. I wish you all the best. 73