Adding SOTABEAMS LASERBEAM-VARI Digital Variable Audio f\Filter Module to Your BITX/uBITX
I have developed an Arduino sketch for the SOTAEAMS Vari-filter which includes a nice display.? It utilizes a USB Nano V3.0 ATmega328 16M 5V Micro-controller CH340G board, or similar, available from Amazon and other sources and an OLED display module such as the HiLetgo 1.3" IIC I2C Serial 128x64 SSH1106 OLED LCD Display LCD Module for Arduino AVR PIC, or similar. I am happy to share this but cannot offer any support - so please do not contact me.
You can download the sketch and a schematic, in PDF, from the SOTABEAMS website:?
Dennis KG4RUL
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Opps, should have been replying to Martin!
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Sent from for Windows 10
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Hi Jerry,
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I have a version 3 kit for sale if you are interested.
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Mike
VE3WMJ
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Sent from for Windows 10
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Sold already.
This radio kit and case are SOLD. ?Thank you for your interest. ?It is going to a good home. ?Bill, WB4ME
On Tue, Apr 23, 2019 at 09:01 AM, Martin KM6TCD wrote:
Is this assembled and tested or still in kit form?
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Hi Jerry,
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I have a version 3 kit for sale if you are interested.
?
Mike
VE3WMJ
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Sent from for Windows 10
?
toggle quoted message
Show quoted text
Sold already.
This radio kit and case are SOLD. ?Thank you for your interest. ?It is going to a good home. ?Bill, WB4ME
On Tue, Apr 23, 2019 at 09:01 AM, Martin KM6TCD wrote:
Is this assembled and tested or still in kit form?
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Sold already.
This radio kit and case are SOLD. ?Thank you for your interest. ?It is going to a good home. ?Bill, WB4ME
On Tue, Apr 23, 2019 at 09:01 AM, Martin KM6TCD wrote:
Is this assembled and tested or still in kit form?
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Still, there's a large base they could tap into. However, the uC32 resources (512K flash, 32K SRAM, 80MHz clock) for $35 doesn't even come close to the competition. Just makes no sense to me.
Jack, W8TEE
On Tuesday, April 23, 2019, 9:38:22 AM PDT, James Lynes <jmlynesjr@...> wrote:
Well since Atmel is now Microchip they are probably having problems rationalizing bigger Atmels vs. PIC32s vs. Me-too ARMs vs. RPIs.
The chipKIT and Fubarino boards are nice().
James
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Well since Atmel is now Microchip they are probably having problems rationalizing bigger Atmels vs. PIC32s vs. Me-too ARMs vs. RPIs.
The chipKIT and Fubarino boards are nice().
James
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Hello all,
?I have seen a few people post about wanting some printing done. I would be happy to help anyone that needs it.
I have a 220*220*250mm build size.
Currently have PLA+ in the following colors: Black, Grey, Natural (semi clear) and reddish orange(like the mics we sell). I will consider other colors and materials upon request. I do not have any ABS at this time.
If you want a print get in touch with me and we can work out something.
I don't have a price standard for this at the moment but I am fair in my pricing.
Please mail me direct: N8DAH at Kit-Projects dot com
--
David
?N8DAH
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Is this assembled and tested or still in kit form?
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Sent:?Sunday, April 21, 2019 at 8:36 AM
From:?"SC" <bill@...>
To:[email protected]
Subject:?Re: [BITX20] uBitX For Sale #ubitx
I am dropping the price to $120, plus shipping, which includes insurance. ?If no one wants it at this price, it stays with me. ?This is for the complete unaltered kit, plus the complete Amateur Radio Kits Universal Case DA Gray make just for this radio. ?The price will not go any lower than this. ?The complete kit with case retails near $200. ?This is the final offer.
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Re: wiring up a cw paddle ref 54899
#bitx20
Perfect! I left my front panel as is and brought the dividers to the rear auxiliary board.?Key?in the front, paddles in the rear.
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Re: Raduino reinforcement, 3d printed
I have found several places around town that do 3D printing including Staples, so its just a matter of finding the best one to do the job. I may consider getting my own printer too, (probably a Ender 3), but I'm not sure how often I would use it. Who knows, maybe I would find all kind of things to print. Another problem is, I have a rather small shack/shop and don't really have the room to have it sitting around collecting dust.
Joel
N6ALT
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Al Peter (AC8GY) and I are working on a new Projects book and in it, I took a few minutes to pull my head out of the sand and look around to see what's happening. Rather than limiting it to the Arduino family, we limited our ?C's to microcontrollers that can be programmed in the Arduino IDE so the reader doesn't need to learn a new programming environment. The book uses the Arduino Nano, but also the Teensy 3.6, the STM32F103, and ESP32 controllers. It is amazing what less than $10 buys in terms of processing power! What I don't understand is why Atmel hasn't come out with a reasonably-priced competitor to these alternatives.
Jack, W8TEE
On Tuesday, April 23, 2019, 2:18:10 AM EDT, MadRadioModder <madradiomodder@...> wrote:
Wow!? Jack is an ESP32 convert! ? ?
From: [email protected] [mailto:[email protected]] On Behalf Of Jack Purdum via Groups.Io
Sent: Monday, April 22, 2019 9:04 PM
To: [email protected]
Subject: Re: [BITX20] Audio AVC ? Exactly. Consider the ESP32 with 1.3Mb of flash, 350Kb of SRAM, all scooting along at 240Mhz at a price of around $6. It also has two DAC ports. While the DAC ports are only 8 bit, it's better than no DAC. Also, you can program the ESP32 from within the Arduino IDE. So far, I haven't found any libraries that don't work with it. Oh, it also has builtin WIFI and Bluetooth. On Monday, April 22, 2019, 9:37:05 PM EDT, Jerry Gaffke via Groups.Io <jgaffke@...> wrote: Doing AGC in software would incur added delay, especially with an i2c pot on our beloved little Nano.
We want to keep the attack time as short as possible.
Would be fun to try, perhaps using one of the small ARM processors with fast embedded ADC and DAC capabilities.
Jerry
On Mon, Apr 22, 2019 at 05:45 PM, Hasan Murtaza wrote: Technically the simplest circuit (for some people) would be a software solution. Send the amplified output to a diode plus capacitor in a peak detector configuration. The capacitor voltage will be a quasi DC signal proportional to the maximum value of the signal. Read it into the arduino via an ADC pin.?
So far, component count =2.
Next replace the collector resistor in the class A common emitter amplifier with a digital potentiometer. Control the pot resistance (and hence the transistor amplification) with a digital output pin of the arduino. Write some software to set the gain based on the measured peak output voltage.
Total parts count is 3.?
If you sample the audio voltage directly you can do even fancier tricks like computing rms value or histograms etc.
Hasan
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¡_. _._
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In a normally clocked Nano, the maximum read rate is 100 microseconds (0.0001sec), or 10,000/second. However, that's just an analog read call. Since something has to be done with the data, the "useful" rate is going to be less.
Jack, W8TEE
On Tuesday, April 23, 2019, 9:52:10 AM EDT, James Lynes <jmlynesjr@...> wrote:
Hasan:
Give it a try and report back. It's an interesting idea.
1. What are the required AVC attack and decay times vs, the Nano maximum ADC read rate plus the added I2C/SPI pot communications overhead?
2. Can loop() tolerate any more overhead without impacting the operability of the UI? Adding another processor defeats the original premise of a minimal part count implementation. Maybe it could be implemented in an ISR, but I believe that I read awhile back of issues with I2C and ISRs. Find/develop a custom I2C library?
James
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Hasan:
Give it a try and report back. It's an interesting idea.
1. What are the required AVC attack and decay times vs, the Nano maximum ADC read rate plus the added I2C/SPI pot communications overhead?
2. Can loop() tolerate any more overhead without impacting the operability of the UI? Adding another processor defeats the original premise of a minimal part count implementation. Maybe it could be implemented in an ISR, but I believe that I read awhile back of issues with I2C and ISRs. Find/develop a custom I2C library?
James
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Primary hit on using a Nano for AGC is the time it takes to drive a digital pot via the i2c bus,
especially since i2c is also running the si5351 and perhaps a display.
Don't have enough pins to go spi, unless it's a second Nano.
Regardless, way easier to do it with 2 or 3 FET's than it is to trip over software timing every
with every hack to the Nano firmware, or to add an extra processor.
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On Mon, Apr 22, 2019 at 09:47 PM, Tom, wb6b wrote:
This isn't requiring the micro controller to do any heavy duty DSP type processing. I think it would be very fast. An Arduino Nano may be fast enough.
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Re: wiring up a cw paddle ref 54899
#bitx20
Yes Sam, Sunil told me the following..The resistor need to be mounted on PCB and a cut is required in one track.
I contacted him due to the circuit board is in his Nextion case kit.
Will do the mod later today
73,
Kelly K5AID?
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Re: wiring up a cw paddle ref 54899
#bitx20
There was a recent post about having to cut a trace on the front panel board for paddles.?
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I played around with audio processing for the esp32. I limited external components to analog conditioning only. Core 1 did sample service, core 2 frame processing. Sampling on the timer (rather than DMA) added some phase noise.
Now I like the Nordic nRF52840 dongle¡ª$10¡ªM4F, BLE radio, ADC but no DAC.
Still looking for the complete digital audio processor for $10.
wm6h
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Re: wiring up a cw paddle ref 54899
#bitx20
Interesting. Try measuring the voltage on the keyer analog input pin to the Arduino. If it doesn't go up significantly when the resistance is increased, then?try an external pull-up (maybe 10k) resistor from 5 volts to the keyer's analog input pin to the Nano. It could be the Nano is outside of specification and its internal pull-up is too weak.
If the voltage does go up, I'm not sure what the answer is.
Another person had a similar problem about six months ago. He went through the same tests, initially with no results, but finally solved it. Maybe, you will hear from him or could try searching the messages on the list. If I think of good search keywords, I'll reply again.
Tom, wb6b
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Re: wiring up a cw paddle ref 54899
#bitx20
The same result using a pot to vary dahs... no effect.? No dahs, at all. Im down a power supply so no other rig to compare to at this time.
73,?
Kelly K5AID?
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Wow!? Jack is an ESP32 convert! ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Jack Purdum via Groups.Io
Sent: Monday, April 22, 2019 9:04 PM
To: [email protected]
Subject: Re: [BITX20] Audio AVC? Exactly. Consider the ESP32 with 1.3Mb of flash, 350Kb of SRAM, all scooting along at 240Mhz at a price of around $6. It also has two DAC ports. While the DAC ports are only 8 bit, it's better than no DAC. Also, you can program the ESP32 from within the Arduino IDE. So far, I haven't found any libraries that don't work with it. Oh, it also has builtin WIFI and Bluetooth. On Monday, April 22, 2019, 9:37:05 PM EDT, Jerry Gaffke via Groups.Io <jgaffke@...> wrote: Doing AGC in software would incur added delay, especially with an i2c pot on our beloved little Nano.
We want to keep the attack time as short as possible.
Would be fun to try, perhaps using one of the small ARM processors with fast embedded ADC and DAC capabilities.
Jerry
On Mon, Apr 22, 2019 at 05:45 PM, Hasan Murtaza wrote: Technically the simplest circuit (for some people) would be a software solution. Send the amplified output to a diode plus capacitor in a peak detector configuration. The capacitor voltage will be a quasi DC signal proportional to the maximum value of the signal. Read it into the arduino via an ADC pin.?
So far, component count =2.
Next replace the collector resistor in the class A common emitter amplifier with a digital potentiometer. Control the pot resistance (and hence the transistor amplification) with a digital output pin of the arduino. Write some software to set the gain based on the measured peak output voltage.
Total parts count is 3.?
If you sample the audio voltage directly you can do even fancier tricks like computing rms value or histograms etc.
Hasan
-- ¡_. _._
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N8DAH
Joel Caulkins/N6ALT
MadRadioModder