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Forum Index : Microcontroller and PC projects : CQ CQ CQ Calling all Hams
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Rickard5 Guru  Joined: 31/03/2022 Location: United StatesPosts: 463 |
I've noticed a Few Radio operators here in the back shed, and I got to thinking wouldn't it be neat if we could get some Radio related projects going with Picomite and CMM2. Just some NEAT Stuff to show at the next Field Day in June. What a better way to evangelize our little $4 Basic Computers than to put them on a $20 Screen with some 18650 Batteries and show them off at our monthly Club Meetings and on Field day as something useful ! maybe some little stuff like eletronics Reference apps like a Resistor color calculator, something where I enter a Resistor Value and it shows me color bands, or an Auto Key to send Station Identify every to min, or the one thing I Dream of a CW Decoder, Encoder for my little QRP tuna can Radios :) because my CW is about 1 world an hour :) 73's KF5VZE I may be Vulgar, but , while I'm poor, I'm Industrious, Honest, and trustworthy! I Know my Place |
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| Amnesie Guru Joined: 30/06/2020 Location: GermanyPosts: 675 |
Although I am not an HAM radio operator, I LOVE the en- & decoding side of it, so much that I programmed a lot of CW en- & decoder (also with auto adjustment for speed) for various microcontrollers. I used a tone decoder circuit around the LM567 IC to "lock" the frequency and convert it into logic level and then does the c-program the rest. I think the hardware solution around the LM567 tone decoder IC is obsolete, since the Pico is able to detect the frequency? Or am I missing something? Interesting would be not only CW, RTTY is also interesting! |
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| William Leue Guru Joined: 03/07/2020 Location: United StatesPosts: 405 |
I published a couple of Ham-related items for the CMM2 some time ago. You can find the descriptions on CMM2.FUN. You could port them to the Picomite. -Bill, K2WML |
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TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 6283 |
When I was studying for my license in the early 80's, I wrote a CW practice program. The CW speed was limited to 8 or 16 WPM due to the limitations of the computer and my coding skills. It worked well enough for me to get my license so I was content. For RTTY and Weather FAX decoding, I used phased locked loops to do the heavy lifting but if I was to do it now, I would start with FFT decoding. SSTV is another use for the mites. It was/is on the todo list for the CMM2. Not shure how much can be achieved with the picomite but I expect it can do a lot more than it's size and price suggests. It has to compete with a smart phone or cheap Windows tablet. Jim VK7JH MMedit |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 5091 |
SSTV (even monochrome) would need a CSUB. You have to process 533 pixels per second (less than 2ms/pixel). A CMM2 might be able to (at 500k instructions per second). The color standards are even worse.... Volhout PicomiteVGA PETSCII ROBOTS |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 7938 |
A PIO state machine would eat that for breakfast (it can run at one instruction per clock cycle). Whether you can get MMBasic to keep up with the data transfer to and from it is something else. :) Maybe on the non-VGA PicoMite. This might be a use for the SSD1963 parallel LCD version. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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