Difference between revisions of "VFO-005"
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| − | [[File: | + | [[File:VFO-005_P17270-720px.jpg]] |
| − | |||
| − | |||
| − | + | == Variable Frequency Oscillator (VFO) == | |
| − | + | AD9833 based design. | |
* [[Arduino Pro Mini]] | * [[Arduino Pro Mini]] | ||
| + | ** 3.3V/8MHz | ||
* AD9833 Function Generator | * AD9833 Function Generator | ||
| − | ** Digitally programmable frequency and phase | + | * DC to 12.5 MHz |
| + | * Rotary Encoder/Breakout Board | ||
| + | * 128x32 OLED | ||
| + | * Breadboard Power Supply | ||
| + | ** 3.3V operation | ||
| + | * Mini-360 Voltage regulator (in case) | ||
| + | ** 5-24 VDC input | ||
| + | |||
| + | === AD9833 Function Generator === | ||
| + | |||
| + | [[File:AD9833s-P17243-720px.jpg]] | ||
| + | |||
| + | * Digitally programmable frequency and phase | ||
** 12.65 mW power consumption at 3 V | ** 12.65 mW power consumption at 3 V | ||
** 0 MHz to 12.5 MHz output frequency range | ** 0 MHz to 12.5 MHz output frequency range | ||
| Line 31: | Line 42: | ||
=== Arduino Pro Mini === | === Arduino Pro Mini === | ||
| − | [[File: | + | * 3.3V |
| + | * 8 MHz | ||
| + | |||
| + | [[File:2014-05-14T23_52_48.894Z-2-720px.jpg]] | ||
[[File:ArdProMini-Pins.PNG]] | [[File:ArdProMini-Pins.PNG]] | ||
| Line 47: | Line 61: | ||
* [https://github.com/mprograms/SimpleRotary Simple Rotary Encoder Arduino library] | * [https://github.com/mprograms/SimpleRotary Simple Rotary Encoder Arduino library] | ||
* [http://www.mathertel.de/Arduino/RotaryEncoderLibrary.aspx Library for the Arduino environment for using a rotary encoder as an input] | * [http://www.mathertel.de/Arduino/RotaryEncoderLibrary.aspx Library for the Arduino environment for using a rotary encoder as an input] | ||
| + | |||
| + | === 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] | ||
| + | * 5V/3.3V operation | ||
| + | |||
| + | [[File:VRO-004_P17146-720PX.jpg]] | ||
| + | |||
| + | === Breadboard Power Supply === | ||
| + | |||
| + | * On breadboard build | ||
| + | |||
| + | [[File:BrBdPS-IMG_4809-720px.jpg]] | ||
| + | |||
| + | === Power Distribution Board - Revision X1 === | ||
| + | |||
| + | [[File:PowerDistrib-Front.png]] | ||
| + | |||
| + | * Two headers with 6x2 pins each | ||
| + | * Six pins bussed together | ||
| + | * Ground connection header | ||
| + | * Rounded Corners | ||
| + | * 4 mounting holes for 4-40 screws | ||
| + | |||
| + | == Breadboard == | ||
| + | |||
| + | [[File:P17251-720px.jpg]] | ||
| + | |||
| + | == Schematic == | ||
| + | |||
| + | [[fILE:VFO-005_Schematic.PNG]] | ||
| + | |||
| + | == Build == | ||
| + | |||
| + | * DC jack, power distribution card and Mini-360 voltage regulator | ||
| + | |||
| + | [[File:VFO-005_P17258-720px.jpg]] | ||
| + | |||
| + | * All of the parts get jammed into the box | ||
| + | * Some are hot glued | ||
| + | |||
| + | [[File:VFO-005_P17261-720px.jpg]] | ||
| + | |||
| + | * Cutout for OLED | ||
| + | * Running with frequency counter | ||
| + | |||
| + | [[File:VFO-005_P17267-720px.jpg]] | ||
| + | |||
| + | * Display looks great in person not as good on picture | ||
| + | |||
| + | [[File:VFO-005_P17270-720px.jpg]] | ||
| + | |||
| + | == Measurements == | ||
| + | |||
| + | * 10 KHz to 30 MHz | ||
| + | * 20 dB attenuator (gain set in tinySA to -20dB) | ||
| + | * VFO-005 set to 10 MHz | ||
| + | * Sinewave | ||
| + | * VFO set at 10 MHz | ||
| + | |||
| + | [[file:tinySA_10MHz-Sinewave_From_DC_to_30MHz_.png]] | ||
| + | |||
| + | * Triangle wave | ||
| + | |||
| + | [[file:tinySA_10MHz-Trianglewave_From_DC_to_30MHz_.png]] | ||
| + | |||
| + | * Square wave | ||
| + | |||
| + | [[file:tinySA_10MHz-Squarewave_From_DC_to_30MHz_.png]] | ||
| + | |||
| + | * Half square wave | ||
| + | |||
| + | [[file:tinySA_10MHz-HalfSquarewave_From_DC_to_30MHz_.png]] | ||
| + | |||
| + | * 7 MHz sinewave | ||
| + | |||
| + | [[file:tinySA_7MHz-Sinewave.png]] | ||
Latest revision as of 12:07, 1 October 2021
Contents
Variable Frequency Oscillator (VFO)
AD9833 based design.
- Arduino Pro Mini
- 3.3V/8MHz
- AD9833 Function Generator
- DC to 12.5 MHz
- Rotary Encoder/Breakout Board
- 128x32 OLED
- Breadboard Power Supply
- 3.3V operation
- Mini-360 Voltage regulator (in case)
- 5-24 VDC input
AD9833 Function Generator
- Digitally programmable frequency and phase
- 12.65 mW power consumption at 3 V
- 0 MHz to 12.5 MHz output frequency range
- 28-bit resolution: 0.1 Hz at 25 MHz reference clock
- Sinusoidal, triangular, and square wave outputs
- 2.3 V to 5.5 V power supply
- No external components required
- 3-wire SPI interface
- Extended temperature range: −40°C to +105°C
- Power-down option
- Update Rate: 25(max)
- VOUT Maximum: 0.65V
- VOUT Minimum: 38mV
- VOUT Temperature Coefficient: 200°
- Input High Voltage: 1.7-2.8V
- Input Low Voltage: 0.5-0.7V
- Input Current: 10µA
- Input Capacitance: 3pF
- Operating temperature range is −40°C to +105°C; typical specifications are at 25°C
Arduino Pro Mini
- 3.3V
- 8 MHz
Rotary Encoder/Breakout Board
- 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
128x32 OLED
- Ebay
- 5V/3.3V operation
Breadboard Power Supply
- On breadboard build
Power Distribution Board - Revision X1
- Two headers with 6x2 pins each
- Six pins bussed together
- Ground connection header
- Rounded Corners
- 4 mounting holes for 4-40 screws
Breadboard
Schematic
Build
- DC jack, power distribution card and Mini-360 voltage regulator
- All of the parts get jammed into the box
- Some are hot glued
- Cutout for OLED
- Running with frequency counter
- Display looks great in person not as good on picture
Measurements
- 10 KHz to 30 MHz
- 20 dB attenuator (gain set in tinySA to -20dB)
- VFO-005 set to 10 MHz
- Sinewave
- VFO set at 10 MHz
- Triangle wave
- Square wave
- Half square wave
- 7 MHz sinewave
