Difference between pages "Software Defined Radio (SDR)" and "VFO-003"

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Line 1: Line 1:
* [http://www.rtl-sdr.com/rtl-sdr-quick-start-guide/ RTL-SDR Quick Start Guide]
+
[[fILE:VFO-003_P1861_720px.jpg]]
* [http://www.rtl-sdr.com/buy-rtl-sdr-dvb-t-dongles/ RTL-SDR Dongles (RTL2832U)]
+
 
* [[FM-NOTCH]] Filter
+
== Features ==
* [http://k6jca.blogspot.com/2017/02/an-fpga-sdr-hf-transceiver-part-1.html An FPGA SDR HF Transceiver]
+
 
** [https://github.com/k6jca/fpga-sdr-rev-2.5 GitHub repo]
+
Software controlled VFO
* [https://github.com/AlexandreRouma/SDRPlusPlus/releases SDR++ v1.0.3] - SDR++, The bloat-free SDR software
+
 
* [https://www.gnuradio.org/ GNU Radio] - free & open-source software development toolkit that provides signal processing blocks to implement software radios
+
* Arduino Pro Mini Microprocessor
* [https://www.g4ifb.com/FT8_Hinson_tips_for_HF_DXers.pdf FT8 docs]
+
** 8-bit ATMEGA328 CPU
** [https://www.physics.princeton.edu/pulsar/k1jt/wsjtx.html WSJT-XX FT8 Software]
+
** 8 MHz
* [https://github.com/pavelmc/FT857d Arduino CAT control software]
+
** 3.3V I/O
* [[WA3TFS SDR Upverter Design]]
+
* Detachable Rotary Encoder/OLED card
 +
** SSD1306 OLED Display
 +
*** I2C Interface
 +
** Rotary encoder
 +
* Menu options
 +
** Select between 3 VFOs
 +
** Adjust frequency
 +
** Step sizes: 1Hz, 10 Hz, 100 Hz, 1 KHz, 10 KHz, 100 KHz, 1 MHz, 10 MHz steps (software controllable)
 +
** Adjust frequency accuracy to 0.01 Hz precision
 +
** Turn VFO Off/On (Off = 3.3V)
 +
** Save default values which are loaded at power up
 +
* Si5351A Oscillator
 +
** 3 Outputs
 +
** [https://www.mouser.com/ProductDetail/Fox-Abracon/FOX924B-27?qs=%2Fha2pyFaduhq6kU%252Bi5vLrAGjqnvi7J8gxS%252BDxofzmrc%3D 27 MHz TCXO crystal oscillator]
 +
** I2C Interface
 +
** [http://www.relmon.com/en/mobile/index.php/list/detail/347.html MS5351M Data Sheet] - Alternate part for Si5351A
 +
*** [http://qrp-labs.com/synth/ms5351m.html MS5351M Evaluation Report by QRP-Labs]
 +
* 3.3V, 50 Ohm outputs
 +
** +12.6 dBm output
 +
* Power
 +
** [[Mini360_Buck_Converter|MINI-360 DC/DC Buck regulator]]
 +
** 5-24 VDC
 +
** 30mA at 12VDC
 +
* Fits in standard extruded enclosures
 +
 
 +
=== Arduino Pro Mini ===
 +
 
 +
* [https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2510209.m570.l1313&_nkw=Arduino+Pro+Mini+3.3V&_sacat=0 Ebay search for Arduino Pro Mini 3.3V]
 +
* [https://www.amazon.com/s?k=arduino+pro+mini+3.3v&crid=32353SO1QC57M&ref=nb_sb_ss_ts-doa-p_4_16 Amazon search for Arduino Pro Mini 3.3V]
 +
 
 +
[[File:ArdruinoProMini-EBAY_PART-720px.png]]
 +
 
 +
=== Power ===
 +
 
 +
* 5-24 VDC
 +
* 30mA at 12VDC
 +
* 55mA at 5V
 +
* 35mA at 9V
 +
* 28mA at 14V
 +
* 33mA at 23V
 +
 
 +
=== TCXO ===
 +
 
 +
* TXCO requires very little frequency correction
 +
* [https://www.mouser.com/ProductDetail/Fox-Abracon/FOX924B-27?qs=%2Fha2pyFaduhq6kU%252Bi5vLrAGjqnvi7J8gxS%252BDxofzmrc%3D 27 MHz TCXO crystal oscillator]
 +
** Package / Case: 5 mm x 3.2 mm
 +
** Frequency: 27 MHz
 +
** Frequency Stability: 2.5 PPM
 +
** Supply Voltage - Max: 3.3 V
 +
* [https://www.mouser.com/ProductDetail/Fox-Abracon/FOX924B-25?qs=%2Fha2pyFadui2wJvSeJUfy4U6zwGkGxGt0HiIeYtjWowmwSAvVs76ZA%3D%3D 25 MHz] - Alternate would require software changes
 +
 
 +
== Connectors ==
 +
 
 +
=== J1 - OLED ===
 +
 
 +
* Located on display/encoder board
 +
 
 +
# SDA
 +
# SCL
 +
# Vcc
 +
# GND
 +
 
 +
[[file:VFO-003_J1.PNG]]
 +
 
 +
=== J2 - Display Encoder/OLED (Display card) ===
 +
 
 +
* Connect via cable to display/encoder board
 +
 
 +
# Encoder A
 +
# Encoder B
 +
# Encoder Switch
 +
# SCL
 +
# SDA
 +
# Vcc
 +
# GND
 +
 
 +
[[file:VFO-003_J2.PNG]]
 +
 
 +
=== J3 - Display Encoder/OLED (Main card) ===
 +
 
 +
* Connect via cable to display/encoder board
 +
 
 +
# Encoder A
 +
# Encoder B
 +
# Encoder Switch
 +
# SCL
 +
# SDA
 +
# Vcc
 +
# GND
 +
 
 +
[[file:VFO-003_J3.PNG]]
 +
 
 +
=== J4 - FTDI ===
 +
 
 +
* Can install 1x6 header on the Arduino Pro Mini and not install this
 +
 
 +
# GND
 +
# GND
 +
# Vcc
 +
# RX
 +
# Tx
 +
# DTR
 +
 
 +
[[file:VFO-003_J4.PNG]]
 +
 
 +
=== J5 - Arduino A0-A3/C10-D13 ===
 +
 
 +
# A3
 +
# A2
 +
# A0
 +
# D13
 +
# D12
 +
# D11
 +
# D10
 +
# Vcc (not connected on Rev 1 PCB)
 +
# GND (not connected on Rev 1 PCB)
 +
 
 +
[[file:VFO-003_J5.PNG]]
 +
 
 +
=== J6 - Disconnect for Mini-360 Power Supply ===
 +
 
 +
* The [[Mini360 Buck Converter]] comes adjusted for a very high output voltage
 +
* Remove jumper to adjust the output voltage to 3.3V without powering the rest of the card
 +
* Install to power the card from the power supply only after adjusting output
 +
 
 +
[[file:VFO-003_J6.PNG]]
 +
 
 +
[[file:Mini-360-004.jpg]]
 +
 
 +
=== J7 - Output disconnects ===
 +
 
 +
* Cut rear side trace to disconnect
 +
* Can be used to install external LP filters
 +
* Limited use due to 74AC14 drivers
 +
 
 +
[[file:VFO-003_J7.PNG]]
 +
 
 +
=== J8 - Arduino P5-P9 ===
 +
 
 +
# P5
 +
# P6
 +
# P7
 +
# P8
 +
# P9
 +
# Vcc
 +
# GND
 +
 
 +
[[file:VFO-003_J8.PNG]]
 +
 
 +
=== J12 - I2C ===
 +
 
 +
[[file:VFO-003_J12.PNG]]
 +
 
 +
=== P1-P3 - Outputs (BNCs) ===
 +
 
 +
== Measurements ==
 +
 
 +
* [[NanoVNA]]
 +
* 10 Mhz signal from the VFO-003
 +
* 1-100 MHz
 +
 
 +
[[file:tinysa_LOGMAG_S11_2021-10-12_12-29-43.png]]
 +
 
 +
[[file:tinysa_LOGMAG_S11_2021-10-12_12-09-58.png]]
 +
 
 +
=== 1-350 MHz scan ===
 +
 
 +
[[file:tinysa_LOGMAG_S11_2021-10-12_12-27-58.png]]
 +
 
 +
=== Harmonic content ===
 +
 
 +
* 10MHz fundamental = +12.25 dBm
 +
* 20MHz harmonic = -16.75 dBm
 +
* 30MHz harmonic = +2.4 dBm
 +
* 50MHz harmonic = -2.1 dBm
 +
 
 +
[[file:tinysa_LOGMAG_S11_2021-10-12_12-19-33.png]]
 +
 
 +
== Schematic ==
 +
 
 +
* [https://github.com/land-boards/lb-boards/blob/master/HamRadio/VFO-003/Documents/Schematics/VFO-003_Rev3_Schematic.pdf Rev 3 schematic]
 +
 
 +
== Software ==
 +
 
 +
* [https://github.com/land-boards/lb-Arduino-Code/tree/master/LBCards/VFO-003 GitHub Repository]
 +
 
 +
[[file:VFO-003_P1867-720pxV.jpg]]
 +
 
 +
=== Memory Usage ===
 +
 
 +
* Total Memory usage
 +
 
 +
<pre>
 +
Sketch uses 25970 bytes (84%) of program storage space. Maximum is 30720 bytes. Global variables use 1503 bytes (73%) of dynamic memory, leaving 545 bytes for local variables. Maximum is 2048 bytes.
 +
</pre>
 +
 
 +
* Display code: 10260
 +
* Si5351 code: 12076
 +
 
 +
==== Minimal u8g2 code ====
 +
 
 +
<pre>
 +
Sketch uses 10260 bytes (33%) of program storage space. Maximum is 30720 bytes. Global variables use 1033 bytes (50%) of dynamic memory, leaving 1015 bytes for local variables. Maximum is 2048 bytes.
 +
</pre>
 +
 
 +
* Code
 +
 
 +
<pre>
 +
void setup(void)
 +
{
 +
  u8g2.begin();
 +
 
 +
}
 +
 
 +
void loop(void)
 +
{
 +
  printStringToOLED("VFO-003");
 +
}
 +
 
 +
void printStringToOLED(char * charStr)
 +
{
 +
  u8g2.clearBuffer();
 +
  u8g2_prepare();
 +
  u8g2.drawStr( 0, 0, charStr);
 +
  u8g2.sendBuffer();
 +
}
 +
 
 +
// u8g2_prepare()
 +
// Setup the screen font, etc
 +
// List of fonts
 +
// https://github.com/olikraus/u8g2/wiki/fntlist8#u8g2-fonts-capital-a-height-38
 +
void u8g2_prepare(void)
 +
{
 +
  u8g2.setFont(u8g2_font_t0_11b_tf); // 8 Pixel tall font
 +
  u8g2.setFontRefHeightExtendedText();
 +
  u8g2.setDrawColor(1);
 +
  u8g2.setFontPosTop();
 +
  u8g2.setFontDirection(0);
 +
}
 +
</pre>
 +
 
 +
==== Minimal u8x8 code ====
 +
 
 +
* [https://github.com/olikraus/u8g2/wiki/u8x8reference#c-example Minimal code]
 +
 
 +
<pre>
 +
Sketch uses 6198 bytes (20%) of program storage space. Maximum is 30720 bytes. Global variables use 446 bytes (21%) of dynamic memory, leaving 1602 bytes for local variables. Maximum is 2048 bytes.
 +
 
 +
</pre>
 +
 
 +
* Code
 +
 
 +
<pre>
 +
// https://github.com/olikraus/u8g2/wiki/u8x8reference#c-example
 +
 
 +
#include <Arduino.h>
 +
#include <SPI.h>
 +
#include <U8x8lib.h>
 +
 
 +
#define U8X8_HAVE_HW_I2C
 +
 
 +
U8X8_SSD1306_128X32_UNIVISION_HW_I2C u8x8(U8X8_PIN_NONE);
 +
 
 +
void setup() {
 +
  // put your setup code here, to run once:
 +
  u8x8.begin();
 +
}
 +
 
 +
void loop() {
 +
  // put your main code here, to run repeatedly:
 +
  u8x8.setFont(u8x8_font_chroma48medium8_r);
 +
  u8x8.drawString(0,0,"Hello World!");
 +
  delay(1000);
 +
 
 +
}
 +
</pre>
 +
 
 +
==== Minimal Si5351 code ====
 +
 
 +
<pre>
 +
Sketch uses 12076 bytes (39%) of program storage space. Maximum is 30720 bytes. Global variables use 378 bytes (18%) of dynamic memory, leaving 1670 bytes for local variables. Maximum is 2048 bytes.
 +
</pre>
 +
 
 +
<pre>
 +
#include <Arduino.h>
 +
#include "si5351.h"
 +
 
 +
// Constructors
 +
Si5351 si5351;
 +
// End of constructor list
 +
 
 +
void setup(void)
 +
{
 +
  unsigned long VFO_0_Freq;
 +
  unsigned long VFO_1_Freq;
 +
  unsigned long VFO_2_Freq;
 +
  bool i2c_found;
 +
  VFO_0_Freq = 14000000;
 +
  VFO_0_Freq = 14000000;
 +
  VFO_0_Freq = 14000000;
 +
  // Si8351 initialiation
 +
  si5351.init(SI5351_CRYSTAL_LOAD_6PF, 27000000, 0);
 +
  si5351.set_freq(VFO_0_Freq, SI5351_CLK0);
 +
  si5351.set_freq(VFO_1_Freq, SI5351_CLK1);
 +
  si5351.set_freq(VFO_2_Freq, SI5351_CLK2);
 +
  si5351.update_status(); 
 +
  si5351.set_correction(0, SI5351_PLL_INPUT_XO);
 +
  si5351.drive_strength(SI5351_CLK0,SI5351_DRIVE_8MA);
 +
  si5351.drive_strength(SI5351_CLK1,SI5351_DRIVE_8MA);
 +
  si5351.drive_strength(SI5351_CLK2,SI5351_DRIVE_8MA);
 +
}
 +
 
 +
void loop(void)
 +
{
 +
}
 +
</pre>
 +
 
 +
=== Feature Adds ===
 +
 
 +
* [https://github.com/pavelmc/FT857d CAT control]
 +
 
 +
== Mechanicals/Enclosure ==
 +
 
 +
* Detachable Front Panel OLED with Rotary Encoder
 +
 
 +
[[file:VFO-003_P1871_720px.jpg]]
 +
 
 +
* Designed to fit into Aluminum Project Box Enclosure DIY 100*76*35mm - [https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313&_nkw=100*76*35mm+aluminum&_sacat=0&LH_TitleDesc=0&_odkw=100*76*35mm+Aluminum+PCB+Instrument+Box+Enclosure+Electronic+Project+Case+Set&_id=174408274566 ebay search]
 +
 
 +
[[file:VFO-003_CAD_Dimensioned.PNG]]
 +
 
 +
[[file:VFO-003_FrontPanel_Holes.PNG]]
 +
 
 +
[[file:VFO-003_RearPanel_Holes.PNG]]
 +
 
 +
== Rev 1 Board Issues List ==
 +
 
 +
No major issues
 +
 
 +
* J5-9 and J5-10 are missing connections
 +
** Add wires on reverse side of the PCB if needed
 +
* Note orientation of I2C termination resistors
 +
** Installed sideways by accident on first build
 +
 
 +
[[file:Rev1-Rework_R10,R11.PNG]]
 +
 
 +
* Note orientation of Mini360
 +
** Put on backwards on first build
 +
** Always use a current limited power supply (I did, no damage)
 +
** Always adjust Mini360 with 3.3V SEL jumper removed
 +
** Solder in with short leads - space up a bit to allow rework
 +
** Orientation is with inductor towards edge of card
 +
 
 +
[[file:Rev1-Rework_Mini360_Oientation.PNG]]
 +
 
 +
== Rev 3 Design ==
 +
 
 +
* Adds J12, I2C connector
 +
** Use with I2C Peripheral like port expanders
 +
 
 +
[[file:Rev3-_J12_I2C.PNG]]
 +
 
 +
* Add silkscreen, "VADJ>" pointing to the adjustment pot on Mini360
 +
 
 +
[[file:Rev2-Rework_Mini360_VADJ.PNG]]
 +
 
 +
* Add breakaways for Front Panel to make it easier to separate
 +
 
 +
[[file:Rev3-_OLED_Breakaways.PNG]]
 +
 
 +
* Switch to 0.1" pitch SMA edge launch connectors
 +
 
 +
[[file:Rev3-_SMA_Smaller.PNG]]
 +
 
 +
== Assembly Sheet / Parts List ==
 +
 
 +
[[VFO-003 Assembly Sheet - Rev 1]]

Revision as of 01:46, 15 October 2021

VFO-003 P1861 720px.jpg

Features

Software controlled VFO

  • Arduino Pro Mini Microprocessor
    • 8-bit ATMEGA328 CPU
    • 8 MHz
    • 3.3V I/O
  • Detachable Rotary Encoder/OLED card
    • SSD1306 OLED Display
      • I2C Interface
    • Rotary encoder
  • Menu options
    • Select between 3 VFOs
    • Adjust frequency
    • Step sizes: 1Hz, 10 Hz, 100 Hz, 1 KHz, 10 KHz, 100 KHz, 1 MHz, 10 MHz steps (software controllable)
    • Adjust frequency accuracy to 0.01 Hz precision
    • Turn VFO Off/On (Off = 3.3V)
    • Save default values which are loaded at power up
  • Si5351A Oscillator
  • 3.3V, 50 Ohm outputs
    • +12.6 dBm output
  • Power
  • Fits in standard extruded enclosures

Arduino Pro Mini

ArdruinoProMini-EBAY PART-720px.png

Power

  • 5-24 VDC
  • 30mA at 12VDC
  • 55mA at 5V
  • 35mA at 9V
  • 28mA at 14V
  • 33mA at 23V

TCXO

  • TXCO requires very little frequency correction
  • 27 MHz TCXO crystal oscillator
    • Package / Case: 5 mm x 3.2 mm
    • Frequency: 27 MHz
    • Frequency Stability: 2.5 PPM
    • Supply Voltage - Max: 3.3 V
  • 25 MHz - Alternate would require software changes

Connectors

J1 - OLED

  • Located on display/encoder board
  1. SDA
  2. SCL
  3. Vcc
  4. GND

VFO-003 J1.PNG

J2 - Display Encoder/OLED (Display card)

  • Connect via cable to display/encoder board
  1. Encoder A
  2. Encoder B
  3. Encoder Switch
  4. SCL
  5. SDA
  6. Vcc
  7. GND

VFO-003 J2.PNG

J3 - Display Encoder/OLED (Main card)

  • Connect via cable to display/encoder board
  1. Encoder A
  2. Encoder B
  3. Encoder Switch
  4. SCL
  5. SDA
  6. Vcc
  7. GND

VFO-003 J3.PNG

J4 - FTDI

  • Can install 1x6 header on the Arduino Pro Mini and not install this
  1. GND
  2. GND
  3. Vcc
  4. RX
  5. Tx
  6. DTR

VFO-003 J4.PNG

J5 - Arduino A0-A3/C10-D13

  1. A3
  2. A2
  3. A0
  4. D13
  5. D12
  6. D11
  7. D10
  8. Vcc (not connected on Rev 1 PCB)
  9. GND (not connected on Rev 1 PCB)

VFO-003 J5.PNG

J6 - Disconnect for Mini-360 Power Supply

  • The Mini360 Buck Converter comes adjusted for a very high output voltage
  • Remove jumper to adjust the output voltage to 3.3V without powering the rest of the card
  • Install to power the card from the power supply only after adjusting output

VFO-003 J6.PNG

Mini-360-004.jpg

J7 - Output disconnects

  • Cut rear side trace to disconnect
  • Can be used to install external LP filters
  • Limited use due to 74AC14 drivers

VFO-003 J7.PNG

J8 - Arduino P5-P9

  1. P5
  2. P6
  3. P7
  4. P8
  5. P9
  6. Vcc
  7. GND

VFO-003 J8.PNG

J12 - I2C

VFO-003 J12.PNG

P1-P3 - Outputs (BNCs)

Measurements

  • NanoVNA
  • 10 Mhz signal from the VFO-003
  • 1-100 MHz

Tinysa LOGMAG S11 2021-10-12 12-29-43.png

Tinysa LOGMAG S11 2021-10-12 12-09-58.png

1-350 MHz scan

Tinysa LOGMAG S11 2021-10-12 12-27-58.png

Harmonic content

  • 10MHz fundamental = +12.25 dBm
  • 20MHz harmonic = -16.75 dBm
  • 30MHz harmonic = +2.4 dBm
  • 50MHz harmonic = -2.1 dBm

Tinysa LOGMAG S11 2021-10-12 12-19-33.png

Schematic

Software

VFO-003 P1867-720pxV.jpg

Memory Usage

  • Total Memory usage
Sketch uses 25970 bytes (84%) of program storage space. Maximum is 30720 bytes. Global variables use 1503 bytes (73%) of dynamic memory, leaving 545 bytes for local variables. Maximum is 2048 bytes.
  • Display code: 10260
  • Si5351 code: 12076

Minimal u8g2 code

Sketch uses 10260 bytes (33%) of program storage space. Maximum is 30720 bytes. Global variables use 1033 bytes (50%) of dynamic memory, leaving 1015 bytes for local variables. Maximum is 2048 bytes.
  • Code
void setup(void)
{
  u8g2.begin();

}

void loop(void)
{
  printStringToOLED("VFO-003");
}

void printStringToOLED(char * charStr)
{
  u8g2.clearBuffer();
  u8g2_prepare();
  u8g2.drawStr( 0, 0, charStr);
  u8g2.sendBuffer();
}

// u8g2_prepare()
// Setup the screen font, etc
// List of fonts
// https://github.com/olikraus/u8g2/wiki/fntlist8#u8g2-fonts-capital-a-height-38
void u8g2_prepare(void)
{
  u8g2.setFont(u8g2_font_t0_11b_tf); // 8 Pixel tall font
  u8g2.setFontRefHeightExtendedText();
  u8g2.setDrawColor(1);
  u8g2.setFontPosTop();
  u8g2.setFontDirection(0);
}

Minimal u8x8 code

Sketch uses 6198 bytes (20%) of program storage space. Maximum is 30720 bytes. Global variables use 446 bytes (21%) of dynamic memory, leaving 1602 bytes for local variables. Maximum is 2048 bytes.

  • Code
// https://github.com/olikraus/u8g2/wiki/u8x8reference#c-example

#include <Arduino.h>
#include <SPI.h>
#include <U8x8lib.h>

#define U8X8_HAVE_HW_I2C

U8X8_SSD1306_128X32_UNIVISION_HW_I2C u8x8(U8X8_PIN_NONE);

void setup() {
  // put your setup code here, to run once:
  u8x8.begin();
}

void loop() {
  // put your main code here, to run repeatedly:
  u8x8.setFont(u8x8_font_chroma48medium8_r);
  u8x8.drawString(0,0,"Hello World!");
  delay(1000);

}

Minimal Si5351 code

Sketch uses 12076 bytes (39%) of program storage space. Maximum is 30720 bytes. Global variables use 378 bytes (18%) of dynamic memory, leaving 1670 bytes for local variables. Maximum is 2048 bytes.
#include <Arduino.h>
#include "si5351.h"

// Constructors
Si5351 si5351;
// End of constructor list

void setup(void)
{
  unsigned long VFO_0_Freq;
  unsigned long VFO_1_Freq;
  unsigned long VFO_2_Freq;
  bool i2c_found;
  VFO_0_Freq = 14000000;
  VFO_0_Freq = 14000000;
  VFO_0_Freq = 14000000;
  // Si8351 initialiation
  si5351.init(SI5351_CRYSTAL_LOAD_6PF, 27000000, 0);
  si5351.set_freq(VFO_0_Freq, SI5351_CLK0);
  si5351.set_freq(VFO_1_Freq, SI5351_CLK1);
  si5351.set_freq(VFO_2_Freq, SI5351_CLK2);
  si5351.update_status();  
  si5351.set_correction(0, SI5351_PLL_INPUT_XO);
  si5351.drive_strength(SI5351_CLK0,SI5351_DRIVE_8MA);
  si5351.drive_strength(SI5351_CLK1,SI5351_DRIVE_8MA);
  si5351.drive_strength(SI5351_CLK2,SI5351_DRIVE_8MA);
}

void loop(void)
{
}

Feature Adds

Mechanicals/Enclosure

  • Detachable Front Panel OLED with Rotary Encoder

VFO-003 P1871 720px.jpg

  • Designed to fit into Aluminum Project Box Enclosure DIY 100*76*35mm - ebay search

VFO-003 CAD Dimensioned.PNG

VFO-003 FrontPanel Holes.PNG

VFO-003 RearPanel Holes.PNG

Rev 1 Board Issues List

No major issues

  • J5-9 and J5-10 are missing connections
    • Add wires on reverse side of the PCB if needed
  • Note orientation of I2C termination resistors
    • Installed sideways by accident on first build

Rev1-Rework R10,R11.PNG

  • Note orientation of Mini360
    • Put on backwards on first build
    • Always use a current limited power supply (I did, no damage)
    • Always adjust Mini360 with 3.3V SEL jumper removed
    • Solder in with short leads - space up a bit to allow rework
    • Orientation is with inductor towards edge of card

Rev1-Rework Mini360 Oientation.PNG

Rev 3 Design

  • Adds J12, I2C connector
    • Use with I2C Peripheral like port expanders

Rev3- J12 I2C.PNG

  • Add silkscreen, "VADJ>" pointing to the adjustment pot on Mini360

Rev2-Rework Mini360 VADJ.PNG

  • Add breakaways for Front Panel to make it easier to separate

Rev3- OLED Breakaways.PNG

  • Switch to 0.1" pitch SMA edge launch connectors

Rev3- SMA Smaller.PNG

Assembly Sheet / Parts List

VFO-003 Assembly Sheet - Rev 1