Difference between revisions of "VFO-002"

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'''This is a work in process '''
+
'''Abandoned for Arduino Pro Mini based design [[VFO-003]]'''
  
[[File:VFO-002-652px.png]]
+
[[File:VFO-002-2.png]]
  
 
== Features ==
 
== Features ==
  
 +
* Software controlled VFO
 
* Blue Pill Microprocessor
 
* Blue Pill Microprocessor
 
** STM32F103 32-but ARM RISC CPU
 
** STM32F103 32-but ARM RISC CPU
Line 13: Line 14:
 
*** I2C Interface
 
*** I2C Interface
 
** Controls frequencies with rotary encoder
 
** Controls frequencies with rotary encoder
** 100 Hz, 1 KHz, 10 KHz, 100 KHz, 1 MHz, 10 MHz steps
+
** 100 Hz, 1 KHz, 10 KHz, 100 KHz, 1 MHz, 10 MHz steps (software controllable
* Si5351 Oscillator
+
* Si5351A Oscillator
 
** 3 Outputs
 
** 3 Outputs
** 25/27 MHz crystal
+
** 25 or 27 MHz crystal
 
** I2C Interface
 
** I2C Interface
 
* Power
 
* Power
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** 7-24 VDC
 
** 7-24 VDC
 
* Fits in standard extruded enclosures
 
* Fits in standard extruded enclosures
 
== Schematic ==
 
  
 
== Parts ==
 
== Parts ==
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* Arduino IDE
 
* Arduino IDE
  
=== 128x32 OLED ===
+
=== OLED ===
 +
 
 +
==== 128x32 OLED ====
  
 
* [https://www.ebay.com/itm/2pcs-0-91-128x32-IIC-I2C-White-OLED-LCD-Display-DIY-Module-For-Arduino/293688288048?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 Ebay]
 
* [https://www.ebay.com/itm/2pcs-0-91-128x32-IIC-I2C-White-OLED-LCD-Display-DIY-Module-For-Arduino/293688288048?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 Ebay]
  
 
[[File:OLED128x32.PNG]]
 
[[File:OLED128x32.PNG]]
 +
 +
==== 128x64 OLED ====
 +
 +
* Rotated
  
 
==== Arduino Library for OLED ====
 
==== Arduino Library for OLED ====
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== Enclosure ==
 
== Enclosure ==
  
[[File:Box-profile-697px.jpg]]
+
== 100x76x35mm Black Aluminum Enclosure ===
  
* [https://www.ebay.com/itm/Black-Aluminium-Extruded-Enclosure-Box-for-Electronic-PCB-Instrument-DIY-Case/253211318108?var=552314497403&hash=item3af492175c:g:IEIAAOSwwc5fh695 Ebay listing]
+
* [https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2386202.m570.l1313&_nkw=100x76x35mm+Aluminum&_sacat=0 ebay search term]
  
 
[[File:box-100x76x30-Mechs.png]]
 
[[File:box-100x76x30-Mechs.png]]
 +
 +
== Schematic ==
  
 
== Mechanicals ==
 
== Mechanicals ==
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== Assembly ==
 
== Assembly ==
  
[[VFO-003 Assembly]]
+
[[VFO-002 Assembly]]

Latest revision as of 16:57, 10 March 2021

Abandoned for Arduino Pro Mini based design VFO-003

VFO-002-2.png

Features

  • Software controlled VFO
  • Blue Pill Microprocessor
    • STM32F103 32-but ARM RISC CPU
    • Arduino compatible
    • 3.3V I/O
  • Detachable Rotary Encoder/OLED card
    • SSD1306 OLED Display
      • I2C Interface
    • Controls frequencies with rotary encoder
    • 100 Hz, 1 KHz, 10 KHz, 100 KHz, 1 MHz, 10 MHz steps (software controllable
  • Si5351A Oscillator
    • 3 Outputs
    • 25 or 27 MHz crystal
    • I2C Interface
  • Power
    • MINI-360 DC/DC Buck regulator
    • 7-24 VDC
  • Fits in standard extruded enclosures

Parts

Blue Pill Card

STM32F103C8T6-Blue-Pill-Pin-Layout.gif

  • 3.3V operation work without level shifters for I2C
    • OLED can run from 3.3V
    • Si5351 can only run from 3.3V
  • Used right angle headers and Dupont cables
  • Replaced BOOT 0,1 jumpers
    • Jumper on BOOT1
    • Switch on BOOT0 - easier to download code
  • Download via serial
  • Arduino IDE

OLED

128x32 OLED

OLED128x32.PNG

128x64 OLED

  • Rotated

Arduino Library for OLED

U8G2_SSD1306_128X32_UNIVISION_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);   // STM32, Ebay OLED
  u8g2.setFont(u8g2_font_ncenB14_tr);
Hello World Code
U8G2_SSD1306_128X32_UNIVISION_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);   // STM32, Ebay OLED

void setup(void) {
  u8g2.begin();
}

void loop(void) {
  u8g2.clearBuffer();			// clear the internal memory
  u8g2.setFont(u8g2_font_ncenB08_tr);	// choose a suitable font
  u8g2.drawStr(0,10,"Hello World!");	// write something to the internal memory
  u8g2.sendBuffer();			// transfer internal memory to the display
  delay(1000);  
}

Rotary Encoder

Si5351 Frequency Generator

  • I2C Daisy-chain connector
  • 3 outputs
    • Tx
    • Rx (may not need to use separate output)
    • BFO - could be adjusted

Mini-360 Buck Converter

  • Power from 7-23 VDC in
  • 5V out

Mini-360-power-regulator.jpg

Mini-360-Dimensions-01.PNG

Enclosure

100x76x35mm Black Aluminum Enclosure =

Box-100x76x30-Mechs.png

Schematic

Mechanicals

VFO-002 Mechanicals.PNG

Libraries/Example Code

Videos

Assembly

VFO-002 Assembly