Difference between pages "File:TinySA VFO-001 10MHz-Signal Narrow-10MHz.png" and "VFO-001"

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[[File:VFO-001_P132-720px.jpg]]
  
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== Features ==
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* [[SDD1306 OLED Display]]
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** I2C Interface
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** OLED runs from 3.3V (can run from 5V but this use has 3.3V)
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* [[RotaryEnc|Rotary Encoder Break Out Board]]
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* [[Arduino Pro Mini]]
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** Arduino compatible
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** 3.3V
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** 8 MHz
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** Programmed via Arduino IDE
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*** Download via serial
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* [[Si5351 Oscillator Breakout Board]]
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** 10 KHz - 40 MHz tuning range
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*** 1Hz/10Hz/100Hz/1KHz/10KHz/100KHz/1MHz/10MHz steps
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** I2C Interface
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** 3 Outputs
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** 27 MHz crystal
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** 3.3V operation works without level shifters for I2C*
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** Si5351 can only run from 3.3V
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** Used right angle headers and Dupont cables for low profile
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* [[Mini360_Buck_Converter|Mini-360 Buck Regulator]]
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** 5V-23V input
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** 3.3V output
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* [https://www.adafruit.com/product/2230 Extruded Aluminum Enclosure Box - 94mm x 83mm x 30mm]
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== Schematic ==
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[[File:VFO-001-SCHEMATIC-V2A.PNG]]
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* PWR* - connect only when no Mini-360 Buck Regulator is used
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* [[PD01]] - Power Distribution card (not shown)
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== Build ==
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* [https://www.adafruit.com/product/2230 Extruded Aluminum Enclosure Box - 94mm x 83mm x 30mm] - Out of stock
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* BNC/Power Jack placement
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[[File:VFO-001-Nibbler-BNCs_Placement-720px.jpg]]
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* Rear panel BNCs and power jack
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[[File:VFO-001-Rear_Panel-720px.jpg]]
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* Drill holes and nibble out for OLED cutout
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** A bit rough
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** Better to undercut nibble and file to size
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[[File:VFO-001-Nibbler-01-720px.jpg]]
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* OLED fitted
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[[File:VFO-001-Nibbler-OLED-Fitted-720px.jpg]]
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* Final
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[[File:VFO-001_P132-720px.jpg]]
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== Libraries/Example Code ==
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=== Land Boards Code ===
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* [https://github.com/land-boards/lb-Arduino-Code/tree/master/STM32/VFO_Si5351 Land Boards Application]
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==== VFO Menu ====
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* Set Step Size
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** 1Hz, 10 Hz, 100 Hz, 1KHz, 10KHz, 100 KHz, 1 MHz, 10 MHz
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* Set frequency
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** 10 MHz to 40 MHz in step size steps
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* Select VFO
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** VFO0, VFO1, VFO2
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* VFO On/Off
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** On, Off
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* Drive Level
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** 2 mA, 4 mA, 6 mA, 8 mA
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* Set Calibration Value
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** In step size steps (down to 1 Hz)
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* Save [power-on] defaults
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=== Libraries used in this app ===
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* [https://github.com/olikraus/u8g2 U8g2: Library for monochrome displays, version 2]
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* [https://github.com/etherkit/Si5351Arduino Si5351 Library for Arduino]
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* [https://www.best-microcontroller-projects.com/rotary-encoder.html Rotary Encoder] - Software debounced
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=== Other Si5351 Libraries ===
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* [https://github.com/andrey-belokon/Syntez_Si5351_Si570 Universal Digital VFO Si570/Si5351]
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* [https://github.com/adafruit/Adafruit_Si5351_Library Adafruit_Si5351]
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* [https://github.com/NT7S/Si5351 Si5351 Library for avr-gcc]
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* [https://github.com/prt459/Arduino_si5351_VFO_Controller_Keyer vk3hn_VFO_controller]
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* [https://github.com/pu2clr/BFO Simple BFO with si5351 controlled by Arduino]
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* [https://github.com/pu2clr/VFO_BFO_OLED_ARDUINO VFO and BFO with Si5351A, OLED and Arduino]
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== Calbration Using WWV ==
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* Good method that doesn't require a frequency counter
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* Tune via ear and S meter
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* Requires shortwave (or ham) receiver that can receive 5/10/15 MHz
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* Rough tune calibration factor on scope or frequency counter
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* Fine tune to 1 Hz using WWV
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* 15 MHz WWV midday has better resolution
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<video type="youtube">QCJ4cQGOQLI</video>
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== Measurements ==
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* Channel CLK0
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* 10 Mhz
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* 30 dB external attenuator (gain set in tinySA to -30dB)
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* Scan 1MHz to 300MHz
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[[file:tinySA_VFO-001_10MHz-Signal_1MHz-to-300MHz.png]]
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* Zoom into 10 MHz fundamental
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* Approx. 1 dBm signal level
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[[file:tinySA_VFO-001_10MHz-Signal_Narrow-10MHz.png]]
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== Videos ==
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<video type="youtube">58G5atwBX2M</video>
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<video type="youtube">ZkfQFdTcnG8</video>
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<video type="youtube">fJ_3z2IAjKg</video>
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<video type="youtube">pFDvcIk5EAk</video>
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<video type="youtube">jRNrPIrgWto</video>
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* [https://www.youtube.com/c/CharlieMorrisZL2CTM/videos Charlie Morris YouTube channel]

Revision as of 13:04, 1 October 2021

VFO-001 P132-720px.jpg

Features

Schematic

VFO-001-SCHEMATIC-V2A.PNG

  • PWR* - connect only when no Mini-360 Buck Regulator is used
  • PD01 - Power Distribution card (not shown)

Build

  • BNC/Power Jack placement

VFO-001-Nibbler-BNCs Placement-720px.jpg

  • Rear panel BNCs and power jack

VFO-001-Rear Panel-720px.jpg

  • Drill holes and nibble out for OLED cutout
    • A bit rough
    • Better to undercut nibble and file to size

VFO-001-Nibbler-01-720px.jpg

  • OLED fitted

VFO-001-Nibbler-OLED-Fitted-720px.jpg

  • Final

VFO-001 P132-720px.jpg

Libraries/Example Code

Land Boards Code

VFO Menu

  • Set Step Size
    • 1Hz, 10 Hz, 100 Hz, 1KHz, 10KHz, 100 KHz, 1 MHz, 10 MHz
  • Set frequency
    • 10 MHz to 40 MHz in step size steps
  • Select VFO
    • VFO0, VFO1, VFO2
  • VFO On/Off
    • On, Off
  • Drive Level
    • 2 mA, 4 mA, 6 mA, 8 mA
  • Set Calibration Value
    • In step size steps (down to 1 Hz)
  • Save [power-on] defaults

Libraries used in this app

Other Si5351 Libraries

Calbration Using WWV

  • Good method that doesn't require a frequency counter
  • Tune via ear and S meter
  • Requires shortwave (or ham) receiver that can receive 5/10/15 MHz
  • Rough tune calibration factor on scope or frequency counter
  • Fine tune to 1 Hz using WWV
  • 15 MHz WWV midday has better resolution

Measurements

  • Channel CLK0
  • 10 Mhz
  • 30 dB external attenuator (gain set in tinySA to -30dB)
  • Scan 1MHz to 300MHz

TinySA VFO-001 10MHz-Signal 1MHz-to-300MHz.png

  • Zoom into 10 MHz fundamental
  • Approx. 1 dBm signal level

TinySA VFO-001 10MHz-Signal Narrow-10MHz.png

Videos

File history

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