Hi John,
The 4.7k has 5v on one end and slightly less on the other.? I will isolate the encoder and try again.?
Geoff
On 25 April 2018 at 09:33, John <vk2eta@...> wrote: Hi Geoff,
I just realised that you can't use the push button either so you won;t be able to access the voltage monitor, so forget the last point about the other software.
One think I find strange is the 1V only on the PTT line.?
One option would be if you feel like it is to isolate (de-solder the cable or selectively remove the female pins in the controls connector) the PTT, Key input and encoder's push-button. That would leave only? the encoder and allow you to see if at least this is working.
73, John (VK2ETA)?
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Hi Geoff,
I just realised that you can't use the push button either so you won;t be able to access the voltage monitor, so forget the last point about the other software.
One think I find strange is the 1V only on the PTT line.?
One option would be if you feel like it is to isolate (de-solder the cable or selectively remove the female pins in the controls connector) the PTT, Key input and encoder's push-button. That would leave only? the encoder and allow you to see if at least this is working.
73, John (VK2ETA)?
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Hello Geoff,
So I would say the 5V is fine, your Arduino is working as what is on the display is coherent and at least a set of digital output are working (as they drive the display).
From what you say it seems that there is an issue with the controls section as labelled on the Raduino schematic.
I would concentrate on the wiring from the Raduino connector to the encoder and plugs.
Can you check that the encoder voltage change is seen on the connector on the Raduino too.
If you have the possibility of installing the KD8CEC software it has an analogue input monitor function. This would tell you a fair bit as to what if anything the Raduino is seing on its control inputs.
Hope that helps,
73, John (VK2ETA)
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Do you have the 4.7K on the key line soldered properly?
Worst case you will need to replace the NANO. If you are experienced fine otherwise take some
help so as to not damage the raduino board when you remove the nano. I removed the nano
and left the pins on the Raduino so that it wont get damaged.
Raj
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At 25-04-18, you wrote: I should also say that the display lights up, saying "VFO A 7.150 MHz, it will not tune, although the encoder shows 5-0-5-0-5-0 at the pins as it is turned. Pressing the knob 'in' does nothing. The audio produces a hiss and the volume control works OK.
Geoff
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The oleds can have a very high rf interference depending upon how you mount them. They are a current hog too.. Go into this carefully. - f
On Wed, 25 Apr 2018, 12:55 William R Maxwell, < wrmaxwell@...> wrote:
and I have just done
so.
Bill, VK7MX
On 25/04/2018 7:41 AM, Jerry Gaffke via
Groups.Io wrote:
I got a Blue Pill with the 48 pin TQFP STM32F103 about a year ago,
got it to speak Arduino just fine.
Of course, some Arduino libraries aren't ported, but it's a major
step up from the Nano.
Blue Pill boards can be had for $2 each.
As I suggested a few posts back, if you build a board with the 64
pin TQFP STM32F103 you have a wide range
of processors to choose from.? From an ARM M0 core with 64k of
flash and 8K of RAM? for $1 at quantity
up to an M4 core with 1024k of flash and 192k of RAM and floating
point hardware for for $8.
All pin compatible, with 50+ pins of user IO.??
Here's the bottom end part:?
and the top end:?
Build our own board and we can choose our own processor frequency
to avoid that 12mhz BFO,
and perhaps have the UART-to-USB connection happen in a cable so
we don't?
normally have to deal with the 12mhz USB oscillator.
Though, in an attempt to stay on topic, I will admit that
it would be much easier to just buy the Protoneer.
Jerry, KE7ER
On Tue, Apr 24, 2018 at 02:08 pm, Kees T wrote:
The various STM "pill boards" sound promising and are
--very-- cheap.....did you know there are 17 different STM32F103
products out there and the STM32F103C8 is one of the "simpler"
chips. The chips themselves go from 36 pins to 100 pins. I see
they all have a RTC.
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and I have just done
so.
Bill, VK7MX
On 25/04/2018 7:41 AM, Jerry Gaffke via
Groups.Io wrote:
toggle quoted message
Show quoted text
I got a Blue Pill with the 48 pin TQFP STM32F103 about a year ago,
got it to speak Arduino just fine.
Of course, some Arduino libraries aren't ported, but it's a major
step up from the Nano.
Blue Pill boards can be had for $2 each.
As I suggested a few posts back, if you build a board with the 64
pin TQFP STM32F103 you have a wide range
of processors to choose from.? From an ARM M0 core with 64k of
flash and 8K of RAM? for $1 at quantity
up to an M4 core with 1024k of flash and 192k of RAM and floating
point hardware for for $8.
All pin compatible, with 50+ pins of user IO.??
Here's the bottom end part:?
and the top end:?
Build our own board and we can choose our own processor frequency
to avoid that 12mhz BFO,
and perhaps have the UART-to-USB connection happen in a cable so
we don't?
normally have to deal with the 12mhz USB oscillator.
Though, in an attempt to stay on topic, I will admit that
it would be much easier to just buy the Protoneer.
Jerry, KE7ER
On Tue, Apr 24, 2018 at 02:08 pm, Kees T wrote:
The various STM "pill boards" sound promising and are
--very-- cheap.....did you know there are 17 different STM32F103
products out there and the STM32F103C8 is one of the "simpler"
chips. The chips themselves go from 36 pins to 100 pins. I see
they all have a RTC.
|
I should also say that the display lights up, saying "VFO A? 7.150 MHz, it will not tune, although the encoder shows 5-0-5-0-5-0 at the pins as it is turned. Pressing the knob 'in' does nothing.? The audio produces a hiss and the volume control works OK.
Geoff
|
Re: Poor Man's Panadapter?
Fabulous work, Now, do two more things : 1. Using a volume control in the front end, measure the resistance at various settings and read out the readings on the analog port.? 2. Using this as a chart, you can produce a very accurate signal level to db chart. Your spectrum analyzer is ready!?
That's really neat! How long does it take to do the scan? How often do you do the scan??
--
John - WA2FZW
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Re: W8TEE TFT/VFO DDS adapter
Any stray adapters left? Discovered a couple of spare boards in need of the dds variety that seems to have become unobtainium.
Ross
vk3ucr
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Dave that¡¯s a great idea with the fan powered on only when in transmit I might do the same thing here. I¡¯ve got a few very small fans here salvaged from somewhere and they are quiet too.? Have you done any other mods? I¡¯ve done my version of the thump mod and waiting for parts to flatten out the driver amp response. I¡¯m also doing the mic amp gain increase mod too.
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On Apr 24, 2018, at 23:15, davesters@... wrote: Thanks for the advice Skip.?
Did some long transmissions on 40 and indeed the power transistors did get pretty hot. I had not noticed it.?
Went to my box of computer parts and pulled out a nice brushless computer fan. Thought about putting a circuit to turn on the fan when the tx is on. After a couple of minutes I did the more expedient route and wired the fan directly into the power supply It runs anytime the PS is running. My experience with larger heat sinks is that a fan easily Trumps a larger heat sink.?
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Re: Wanted: your dead uBitx.
#ubitx
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You are correct.
However, they've already been freed up.
The stock Raduino has 4 data bits to the LCD.
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On Tue, Apr 24, 2018 at 08:22 pm, Kees T wrote:
I was under the impression that the existing 2x16 LCDs could be used in 4 bit mode or 8 bit mode which would free up 4 pins.
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I was under the impression that the existing 2x16 LCDs could be used in 4 bit mode or 8 bit mode which would free up 4 pins.
Many alternatives ....OLED displays with IIC interfaces, etc etc.....but it drives the cost up.??
73 Kees K5BCQ
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Thanks for the advice Skip.?
Did some long transmissions on 40 and indeed the power transistors did get pretty hot. I had not noticed it.?
Went to my box of computer parts and pulled out a nice brushless computer fan. Thought about putting a circuit to turn on the fan when the tx is on. After a couple of minutes I did the more expedient route and wired the fan directly into the power supply It runs anytime the PS is running. My experience with larger heat sinks is that a fan easily Trumps a larger heat sink.?
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Re: Poor Man's Panadapter?
That's really neat! How long does it take to do the scan? How often do you do the scan??
--
John - WA2FZW
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Re: Poor Man's Panadapter?
Very Nice,
Curious if you are using DSP on the Teensy 3.2? Kinetis K20 Arm4 core, or using the SGTL5000 Codec for processing.? I hear great things about the Teensy DSP Audio library, but from what I have seen it is running? in the Codec.
Regards,
Gary
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Re: Poor Man's Panadapter?
Good work.
I also scratch-built the uBitx and seems to be working OK on receive,?still testing?out on transmit ?. . .?could you share more detail/photos of your build?
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Hi All: Here's an experiment that might be of interest, especially to anyone thinking about one of those fancy ICOM 73000000s.? The goal is to build a crude panadapter into my BITX rig without resorting to external PCs, SDR dongles, etc.? I am using a few cheats in my scratch-build BITX that may make this tricky on a stock unit, but I'm sure the group can figure out how to expand this into the mainstream. It's a bit like a Sweeperino I guess.? I've built my firmware to quickly sweep the VFO across the band of interest (40m phone in my case) and then to look at the AF spectrum at each point and display the result in a simplistic spectrum display.? Obviously, this interrupts the receive for a brief instant when it is happening, but I've also set things up with an extra MOSFET so that the audio output can be suppressed during the sweep to hide the annoying sounds. You probably have this mod in your rig anyhow if you've added an AGC. I think the most sophisticated way to go is to do some DSP fiddling of the overlapping 3 kHz segments of the spectrum that are sampled during the sweep.? At the moment I am sweeping in 500 Hz steps so there is overlap in the samples of the audio.? This needs some more experimentation to get the optimal sweep speed, the cleanest way to stitch things together, averaging, etc. but even something basic is good enough to show the activity on the band. There's another thread going right now talking about the use of the Teensy processor, which I completely endorse.? I've used the 3.2 in all of my various BITX builds and find the added versatility of being able to do DSP very useful.? I'm not a DSP expert by any means, but there is some great capability on the Teensy boards. I have also been using a 128x64 OLED display which makes these simple graphics possible.? I know ... it's noisy.? You guys with the giant color TFTs displays could make something even cooler I'm sure. Here's what my initial display looks like.? The caret at the very bottom is pointing to where the VFO is currently set.? You know it's working because you can always see the signature 7199 BITX birdie!  ? This link is to a video that was made with the sweep slowed and the audio on so you can hear how it works.? It sounds like a strange SSTV mode, but it's actually the entire 40m phone band being analyzed for activity:? More to follow if I can improve this. 73s, Bruce KC1FSZ?
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The problem with remaining pin compatible with the Nano is that there aren't enough of them.
Maybe stick that si5351 on the main uBitx board where it belongs using a
little itty bitty board glued to the back groundplane.? Use an I2C display so there aren't many wires
to deal with there.? Now you can sell your old Raduino in the forum and use any fool microcontroller
board you want, be it Nano, Blue Pill, Teensy, Protoneer, or RPi.
Jerry
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On Tue, Apr 24, 2018 at 04:12 pm, Gary Anderson wrote:
I was unable to find a Blue Pill or ST board variation that was _pin_ compatible with the Nano.
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Re: Low mic gain, was, show your mic
I have bookmarked it.? Looks like there is a lot of good information there.? Thank you. ? Regards. ? Max K 4 O D S. ? I've Never Lost the Wonder. ? Antique Electronics Site: ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Arvo KD9HLC via Groups.Io
Sent: Tuesday, April 24, 2018 1:17 PM
To: [email protected]
Subject: Re: [BITX20] Low mic gain, was, show your mic ? On Sun, Apr 22, 2018 at 07:57 pm, MAX wrote: All of the correct information needs to be gathered in one place.
Have you seen ubitx.net ?? A lot of hard work went into aggregating the information generated here.
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Raj vu2zap
Skip Davis
Nick VK4PP
_Dave_ AD0B