Difference between revisions of "VFO-002"

Latest revision as of 16:57, 10 March 2021

Abandoned for Arduino Pro Mini based design VFO-003

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

Blue Pill Card

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

Ebay

128x64 OLED

Rotated

Arduino Library for OLED

U8g2: Library for monochrome displays, version 2
- Reference library
- Constructor

U8G2_SSD1306_128X32_UNIVISION_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);   // STM32, Ebay OLED

List of Fonts

  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

Includes pushbutton Switch
Includes Pull-Up resistors
Needs R/C filter on output for debounce
Reading Rotary Encoders - Arduino reference
Simple Rotary Encoder Arduino library
Library for the Arduino environment for using a rotary encoder as an input

Si5351 Frequency Generator

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

@@ Line 1: / Line 1: @@
-'''This is a work in process '''
+'''Abandoned for Arduino Pro Mini based design [[VFO-003]]'''
-[[File:VFO-002-720px.png]]
+[[File:VFO-002-2.png]]
 == Features ==
-* Fits within standard extruded enclosure
+* Software controlled VFO
-* Controls Tx/Rx/BFO frequencies with rotary encoder
-** 100 Hz, 1 KHz, 10 KHz, 100 KHz, 1 MHz, 10 MHz steps
-* DD1306 OLED Display
-** I2C Interface
-** "Curved" display
-* Uses RIT control on HW-9
-** +/- 1 KHz RIT
 * Blue Pill Microprocessor
+** STM32F103 32-but ARM RISC CPU
 ** Arduino compatible
-** 3.3V
+** 3.3V I/O
-* Si5351 Oscillator
+* 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
-** 3 Outputs
+* Power
+** MINI-360 DC/DC Buck regulator
-** 25/27 MHz crystal
+** 7-24 VDC
+* Fits in standard extruded enclosures
-== Schematic ==
-[[File:VFO-001-SCHEMATIC.PNG]]
-== Connections to Radio ==
-* RIT pot
-** Connects to Analog input
-*** Polled occasionally while in receive
-* Band switch
-** SW1 9V
-* T/R - transmit/receive
 == Parts ==
@@ Line 53: / Line 42: @@
 * Arduino IDE
-=== 128x32 OLED ===
+=== OLED ===
-[[File:Si5351_003_720px.jpg]]
+==== 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]
 [[File:OLED128x32.PNG]]
+==== 128x64 OLED ====
+* Rotated
 ==== Arduino Library for OLED ====
@@ Line 92: / Line 85: @@
 </pre>
-=== Rotary Encoder/Breakout Board ===
+=== Rotary Encoder ===
-[[File:RotaryEncoderCAD.PNG]]
-[[File:Si5351_004_720px.jpg]]
 * Includes pushbutton Switch
@@ Line 107: / Line 95: @@
 === Si5351 Frequency Generator ===
-[[File:Si5351_001_720px.jpg]]
-[[File:VFO3.PNG]]
 * I2C Daisy-chain connector
@@ Line 118: / Line 102: @@
 ** BFO - could be adjusted
-[[File:Si5351_002_720px.jpg]]
+=== Mini-360 Buck Converter ===
-==== Measurements ====
+* Power from 7-23 VDC in
+* 5V out
-==== VFO TX ====
+[[File:mini-360-power-regulator.jpg]]
-* 250 KHz range
+[[File:Mini-360-Dimensions-01.PNG]]
-** From 5.9993-5.7493 MHz
-==== VFO RX ====
+== Enclosure ==
-* RIT knob is taken in through an A/D and adjusts the receive frequency plus/minus 1 KHz
+== 100x76x35mm Black Aluminum Enclosure ===
-==== BFO ====
+* [https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2386202.m570.l1313&_nkw=100x76x35mm+Aluminum&_sacat=0 ebay search term]
-* 8.8314 MHz in receive
+[[File:box-100x76x30-Mechs.png]]
-* 8.8307 MHz in transmit
-* 700 Hz difference but could be adjusted
-=== Low Pass Filters ===
+== Schematic ==
-* Si5351 has square wave outputs
+== Mechanicals ==
-* LP filter can be used to change squarewave into sinewave
-* [https://rf-tools.com/lc-filter/ LC Filters Design Tool] - calculator
-* [https://kitsandparts.com Kits and Parts dot Com]
-** [https://kitsandparts.com/lpf.1.5.php Build a 7-pole Universal Low Pass Filter for HF]
-** Butterworth
-** Replace with SMT card?
-[[File:LPF.1.5.sch.png]]
+[[File:VFO-002_Mechanicals.PNG]]
-[[File:LPF.1.5.pcb.png]]
+== Libraries/Example Code ==
-* [http://toroids.info/FT37-43.php Toroid Calculator]
-* [https://kitsandparts.com/PCBs/LPF/filter2.pdf A short guide to harmonic filter for QRP transmitter output]
-** [https://www.mouser.com/ProductDetail/Pulse-Electronics/PE-0805CLH1R5STS?qs=82jvyl5dHWdaYiLrQ038Kg%3D%3D PE-0805CLH1R5STS Example 1 uH inductor]
-** [https://www.mouser.com/Search/Refine?Keyword=PE-0805CLH Search PE inductors]
-** [https://www.mouser.com/Passive-Components/Inductors-Chokes-Coils/Fixed-Inductors/_/N-wpczZ1yzvvqx?P=1yzvlksZ1z0wqjdZ1z0woesZ1z0wrifZ1z0wri6Z1z0wrhxZ1z0wrhoZ1z0wrhfZ1z0wpbo&Ns=Pricing|0 Broader search]
-** [https://www.mouser.com/Passive-Components/Capacitors/Ceramic-Capacitors/_/N-5g8mZ1yzvvqx?P=1z0z7ymZ1yxboka&Rl=5g8mZer3vZ1z0x74kZ1z0x7xwSGT&Keyword=0805&Ns=Pricing|0 0805 caps C0G]
-[[File:LCFilterValues.PNG]]
-* VFO and BFO frequencies are outside the bands (deliberately to void collisions)
-==== BFO Filter ====
-* 8.8314 MHz in receive
-* 8.8307 MHz in transmit
-[[File:BFO_Filter.PNG]]
-[[File:BFO_Filter_IL.PNG]]
-== Libraries/Example Code ==
 * [https://github.com/land-boards/lb-Arduino-Code/tree/master/STM32/VFO_Si5351 Land Boards Application]
 * [https://github.com/pu2clr/VFO_BFO_OLED_ARDUINO VFO and BFO with Si5351A, OLED and Arduino]
@@ Line 196: / Line 150: @@
 * [https://www.youtube.com/c/CharlieMorrisZL2CTM/videos Charlie Morris YouTube channel]
+== Assembly ==
+[[VFO-002 Assembly]]

Difference between revisions of "VFO-002"

Latest revision as of 16:57, 10 March 2021

Contents

Features

Parts

Blue Pill Card

OLED

128x32 OLED

128x64 OLED

Arduino Library for OLED

Hello World Code

Rotary Encoder

Si5351 Frequency Generator

Mini-360 Buck Converter

Enclosure

100x76x35mm Black Aluminum Enclosure =

Schematic

Mechanicals

Libraries/Example Code

Videos

Assembly

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