Jack
Agreed.? I just ordered 5 of these from an Ebay dealer at US$1.98 each.?
Several projects in mind where I need just a bit more speed and memory
than the 16 MHz Arduino provides.? Arv _._
On Mon, Mar 18, 2019 at 11:59 AM Jack Purdum via Groups.Io <jjpurdum= [email protected]> wrote:
I'm starting to back away from the Nano a little. The STM32F103 (aka "Blue Pill") is about the same size as the Nano, but is clocked at 72MHz rather than 16MHZ. It has 128K of flash memory (Nano 32K) and 20K of SRAM (Nano 2K). The real limitation of the Nano is the SRAM, as that's where your data is stored. I bought 10 STM32F103's for a little under $30, or less than $3 each. The STM32F103 can be programmed in the Arduino IDE and most, if not all, of the libraries are available for it. There are YouTube videos/Instructables about programming/using it.
Jack, W8TEE
On Monday, March 18, 2019, 1:25:11 PM EDT, Laurence Oberman < oberman.l@...> wrote:
Allison is correct, its the nano that has the extra pins. I guess you meant the Arduino Mega, that has many more pins but its a large board Online shows Arduino UNO is one of the most famous board in Arduino family after Arduino Duemilanove. It is the latest design of the basic USB board. It comes with 6 analog inputs, 14 digitals output where 6 of themsupport PWM, and 16Mhz clock speed. Nano It is more or less same functionality as the Arduino UNO but in different package. Instead of using the standard USB to connect to the computer, it uses the mini usb but without the power plug for external power source that built on Arduino UNO. The dimension of Arduino Nano is only 43mm x 18mm, it comes with 6 PWM I/O from the total of 14 digitals I/O, 8 analog inputs, 16Mhz clock speed and 32kB of flash memory. On Mon, Mar 18, 2019 at 1:20 PM ajparent1/KB1GMX < kb1gmx@...> wrote: > > Nano has all the pins of the Uno and two more.? THe nano has AD6 and AD7 not on the Uno. > > Allison >
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In the Arduino IDE, compiling for different boards is little more than selecting the desired board and selecting the compile icon. I've had everything from a single 1x20 display to a 480x320 color TFT touch screen display running on various Arduinos. I don't do much with the Uno any more because of its relatively large size. It's still used a lot, however, because there are lots of "shields" from thumbprint readers to GPS modules that plug directly into it. There are lots of options that use the Arduino IDE (Arduino's, Teensy's, STM32F's, etc.) and the "correct" one depends upon what you're trying to do.
Jack, W8TEE
On Monday, March 18, 2019, 12:10:19 PM EDT, Mike Short <ai4ns.mike.spam@...> wrote:
Showing my ignorance here. What would be involved with compiling the nano over to the UNO? it would expose more pins, etc. ?and the possibility of a different display.?
Mike
AI4NS
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Al (AC8GY) has a really nice signal generator he's designed with a nice color display and touch screen interface. We're moving it from the Mega 2560 to the STM32F103 for the book. More later...
Jack, W8TEE
On Monday, March 18, 2019, 12:51:28 PM EDT, Laurence Oberman <oberman.l@...> wrote:
This is the HF signal GEN I built after reading Jack's book.
There is a little white board with the atmega328p, the dds chip is
separate and front panel.
The board I have exposes all the pins. Was very cheap, comes in a kit
and could be used instead of the nano
On Mon, Mar 18, 2019 at 12:42 PM Laurence Oberman via Groups.Io
>
> Hello, same atmega328p but yes extra pins, would need to make sure you
> change the code for pin numbering and the daughter card would have to
> be modified, i.e. remove the nano and create an interface cable for
> the mapping of current pins, then the additional pins can come from
> the Uno direct to the extra screens etc.
>
>
>
> >
> > Showing my ignorance here. What would be involved with compiling the nano over to the UNO? it would expose more pins, etc.? and the possibility of a different display.
> >
> > Mike
> > AI4NS
> >
>
>
>
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I'm starting to back away from the Nano a little. The STM32F103 (aka "Blue Pill") is about the same size as the Nano, but is clocked at 72MHz rather than 16MHZ. It has 128K of flash memory (Nano 32K) and 20K of SRAM (Nano 2K). The real limitation of the Nano is the SRAM, as that's where your data is stored. I bought 10 STM32F103's for a little under $30, or less than $3 each. The STM32F103 can be programmed in the Arduino IDE and most, if not all, of the libraries are available for it. There are YouTube videos/Instructables about programming/using it.
Jack, W8TEE
On Monday, March 18, 2019, 1:25:11 PM EDT, Laurence Oberman <oberman.l@...> wrote:
Allison is correct, its the nano that has the extra pins.
I guess you meant the Arduino Mega, that has many more pins but its a
large board
Online shows
Arduino UNO is one of the most famous board in Arduino family after
Arduino Duemilanove. It is the latest design of the basic USB board.
It comes with 6 analog inputs, 14 digitals output where 6 of
themsupport PWM, and 16Mhz clock speed.
Nano
It is more or less same functionality as the Arduino UNO but in
different package. Instead of using the standard USB to connect to the
computer, it uses the mini usb but without the power plug for external
power source that built on Arduino UNO. The dimension of Arduino Nano
is only 43mm x 18mm, it comes with 6 PWM I/O from the total of 14
digitals I/O, 8 analog inputs, 16Mhz clock speed and 32kB of flash
memory.
On Mon, Mar 18, 2019 at 1:20 PM ajparent1/KB1GMX < kb1gmx@...> wrote: > > Nano has all the pins of the Uno and two more.? THe nano has AD6 and AD7 not on the Uno. > > Allison >
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Re: New V5 with poor carrier suppression.
I have no idea how you get +1dBm.
A 700mv pk-pk square wave centered on ground is 350mV rms (since it's square not sine)
Into 50 ohms, that would be 0.350*0.350/50 = 2.5mW,? so? 10*log10(2.5mW/1mW) = 4dBm.
But the CLK0 LO is driving a 1:2 transformer which then drives two series Schottky diodes,
definitely not a 50 ohm resistor.
?
I believe standard practice is to evaluate dBm for the LO into 50 ohms resistance.
A? mixer designed for that dBm level should then be able to make good use of the LO.
With two Schottky diodes in series and with this transformer arrangement,
we should get best performance (maximum signal handling capacity) at 7dBm of LO power,?
Signal level going in (from the mike amp) should be at least ~10dB less than the LO, or distortion occurs.
The si5351 has 3.3v CMOS output drivers capable of driving up to 8ma,
so even without the attenuation of R110,111,112,113, it's not capable of giving 7dBm into 50 ohms.
While not ideal, it's adequate for a $130 HF rig.
More LO power (especially at the first mixer) would allow the receiver to work with stronger?
out-of-band signals present, which hasn't been a hot button issue for the uBitx.
It would also allow larger signals through the IF stages when transmitting,
but that could also be addressed by adding an amplifier stage to the PA.
Jerry, KE7ER
toggle quoted message
Show quoted text
On Mon, Mar 18, 2019 at 09:48 AM, jim wrote:
The output side of the CLK 0 pad ...700mV p/p? =~+1dbm? ..should be enough
?
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Allison is correct, its the nano that has the extra pins.
I guess you meant the Arduino Mega, that has many more pins but its a
large board
Online shows
Arduino UNO is one of the most famous board in Arduino family after
Arduino Duemilanove. It is the latest design of the basic USB board.
It comes with 6 analog inputs, 14 digitals output where 6 of
themsupport PWM, and 16Mhz clock speed.
Nano
It is more or less same functionality as the Arduino UNO but in
different package. Instead of using the standard USB to connect to the
computer, it uses the mini usb but without the power plug for external
power source that built on Arduino UNO. The dimension of Arduino Nano
is only 43mm x 18mm, it comes with 6 PWM I/O from the total of 14
digitals I/O, 8 analog inputs, 16Mhz clock speed and 32kB of flash
memory.
toggle quoted message
Show quoted text
On Mon, Mar 18, 2019 at 1:20 PM ajparent1/KB1GMX <kb1gmx@...> wrote:
Nano has all the pins of the Uno and two more. THe nano has AD6 and AD7 not on the Uno.
Allison
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The dds chip is the same as used in the Ubitx in my Signal Generator. Signal is very clean and accurate enough for me. Not Oven controlled of course. See the Spec an images of how clean it is On Mon, Mar 18, 2019 at 1:14 PM Laurence Oberman via Groups.Io <oberman.l@...> wrote:
They have a new one now SMT
Mine is this
On Mon, Mar 18, 2019 at 12:54 PM Joel Caulkins/N6ALT <caulktel@...> wrote:
On Mon, Mar 18, 2019 at 09:51 AM, Laurence Oberman wrote:
white board with the atmega328p
Where did you find this? Very compact.
Joel
N6ALT
|
Nano has all the pins of the Uno and two more.? THe nano has AD6 and AD7 not on the Uno.
Allison
|
They have a new one now SMT
Mine is this
toggle quoted message
Show quoted text
On Mon, Mar 18, 2019 at 12:54 PM Joel Caulkins/N6ALT <caulktel@...> wrote:
On Mon, Mar 18, 2019 at 09:51 AM, Laurence Oberman wrote:
white board with the atmega328p
Where did you find this? Very compact.
Joel
N6ALT
|
Ripped my electric drill apart one time to replace brushes and later when I went to reassemble all the hardware was missing including the new brushes and springs. Blamed the wife (grin). A few days later found them in a floor heat register in another room....... kids!
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On Mon, Mar 18, 2019 at 09:51 AM, Laurence Oberman wrote:
white board with the atmega328p
Where did you find this? Very compact. Joel N6ALT
|
This is the HF signal GEN I built after reading Jack's book. There is a little white board with the atmega328p, the dds chip is separate and front panel. The board I have exposes all the pins. Was very cheap, comes in a kit and could be used instead of the nano On Mon, Mar 18, 2019 at 12:42 PM Laurence Oberman via Groups.Io <oberman.l@...> wrote:
Hello, same atmega328p but yes extra pins, would need to make sure you
change the code for pin numbering and the daughter card would have to
be modified, i.e. remove the nano and create an interface cable for
the mapping of current pins, then the additional pins can come from
the Uno direct to the extra screens etc.
On Mon, Mar 18, 2019 at 12:10 PM Mike Short <ai4ns.mike.spam@...> wrote:
Showing my ignorance here. What would be involved with compiling the nano over to the UNO? it would expose more pins, etc. and the possibility of a different display.
Mike
AI4NS
|
Re: New V5 with poor carrier suppression.
The output side of the CLK 0 pad ...700mV p/p? =~+1dbm? ..should be enough
Jim
On Monday, March 18, 2019, 12:09:39 AM PDT, Evan Hand <elhandjr@...> wrote:
I measured at TP18.? It is convenient and what is applied to the T7 coil.? TP18 is the junction of R112, R113, and the ungrounded side of one of the T7 coils on my version 4 schematic.? Since T7 has the same number of turns for each winding, I assumed I should see the same on the output side (which I did).
73
Evan
AC9TU
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Hello, same atmega328p but yes extra pins, would need to make sure you
change the code for pin numbering and the daughter card would have to
be modified, i.e. remove the nano and create an interface cable for
the mapping of current pins, then the additional pins can come from
the Uno direct to the extra screens etc.
toggle quoted message
Show quoted text
On Mon, Mar 18, 2019 at 12:10 PM Mike Short <ai4ns.mike.spam@...> wrote:
Showing my ignorance here. What would be involved with compiling the nano over to the UNO? it would expose more pins, etc. and the possibility of a different display.
Mike
AI4NS
|
Showing my ignorance here. What would be involved with compiling the nano over to the UNO? it would expose more pins, etc. ?and the possibility of a different display.?
Mike
AI4NS
|
Hello,???
????????? I have a clip on heatsink on my regulator and its been running warm coming up to 16 months now prior to adding it got very hot.Dave G0AYD.
On Mon, 18 Mar 2019 at 14:29, Don - KM4UDX < dontAy155@...> wrote: Heat sink it. Hack saw away anything near a toroid.?
It it likely makes zero difference to the successful operation of the rig. But it sure feels good.?
Don
km4udx
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Heat sink it. Hack saw away anything near a toroid.? It it likely makes zero difference to the successful operation of the rig. But it sure feels good.? Don km4udx 
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It's still available.? I've stored a copy that I can share.? Would have to put it on dropbox.? Too big to email.
Bruce, K4TQL
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Yes it seem to? be a general trait among young male kids. Fiddeling with stuff.
RV1, 2, and 3 were all incorrect. WAY off from original settings. I think some curious little fingers in the house were tinkering. I can't even get upset... when I was a kid, I fully disassembled my dad's Swan 350. Ahem...I can still remember the horror!
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RV1, 2, and 3 were all incorrect. WAY off from original settings. I think some curious little fingers in the house were tinkering. I can't even get upset... when I was a kid, I fully disassembled my dad's Swan 350. Ahem...I can still remember the horror!
|
Jim
Joel Caulkins/N6ALT
Kobus ZS6CHK